2026-08-24T07:20:42Z https://journals2.ums.ac.id/mesin/oai

oai:ojs2.journals2.ums.ac.id:article/2374 2025-02-03T18:32:17Z mesin:ART

CHARACTERIZATION OF CENTRIFUGAL CASTING METHOD FOR PULLEY MANUFACTURING USING VARIABLE ROTATIONAL SPEED Wisnujati, Andika Shomad, Muhammad Abdus centrifugal casting brake shoe pulley characterization material Due to advancements in the industrial sector, aluminum is progressively gaining popularity as a material of choice in the field of engineering. A pulley is a component that functions as a link or transfers power or engine rotation to the load via the V-belt belt. This study aims to determine the characterization of aluminum material made by the centrifugal casting method from used brake shoes with rotational speed variables of 0 RPM, 100 RPM, and 200 RPM. The characterization of the casting results in this study was analyzed using the Brinell hardness test and the Charpy impact test. The results of the Brinell hardness test showed that aluminum castings for making pulleys with an additional 100 RPM die rotation speed had a Brinell hardness value of 53.22 BHN. The results of the impact test with the Charpy method showed that specimens with a mold rotation speed of 100 RPM had an impact value of 0.0135 kg.m/mm2. The results of this study concluded that variations in rotational speed of 100 RPM in the casting of pulleys made of used aluminum using the centrifugal casting method can produce products that have good toughness. Universitas Muhammadiyah Surakarta 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/2374 10.23917/mesin.v25i2.2374 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 2 (2024); 92-99 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/2374/2338 Copyright (c) 2024 Andika Wisnujati, Muhammad Abdus Shomad https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/2464 2025-02-03T18:04:19Z mesin:ART

THE EFFECT OF ZNO/CUO-WATER- HYBRID NANOFLUID CONCENTRATION RATIO ON HEAT TRANSFER CHARACTERISTICS IN ELECTRONIC EQUIPMENT COOLING SYSTEMS Alfian, Devia Gahana Cindi Meliala, Arvin Ade Guna Riayatsyah, T. M. Indra Silitonga, Dicky Januarizky heat transfer nanofluids hybrid nanofluids Reynolds Number convection coefficient The use of hybrid nanofluids CuO-ZnO /distilled water as a cooling medium was tested in this study to determine the characteristics of convection heat transfer. The hybrid nanofluids preparation process was carried out first by dispersing the CuO and ZnO nanofluids using an ultrasonic cleaner for 3 hours and then allowed to settle for 24 hours. Furthermore, the CuO and ZnO nanofluids were mixed based on the stipulated ration of CuO:ZnO (25%:75%), (50%:50%) and (75%:25) with a volume fraction of 0.5% and agitated for 1 hour. Testing of the hybrid nanofluids CuO-ZnO/distilled water was carried out using a water block as an electronic cooling device with a flow rate variation of 0.7 – 1.9 l/min. From experimental results, the convection coefficient, as one of performance parameters of cooling device, and its relation to Reynolds numbers was able to be determined. Overall, the results show that the rate of heat transfer with the hybrid nanofluids is higher compared to distilled water. At a particular configuration of flowrate and nanoparticle ratio, the hybrid nanofluid has more than 2.5 times higher coefficient of convection than distilled water. In addition, the experiment revealed that the synthesized nanofluid created a temperature drop of around 40ᵒC across the water block at a heater power of 10 W. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/2464 10.23917/mesin.v25i1.2464 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 21-30 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/2464/2331 Copyright (c) 2024 Devia Gahana Cindi Alfian, Arvin Ade Guna Meliala, T. M. Indra Riayatsyah, Dicky Januarizky Silitonga https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/2815 2025-02-03T18:01:33Z mesin:ART

COMPARATIVE ANALYSIS OF PRESSURE AND FLOW CHARACTERISTICS IN BASIC AND MODIFIED AIR COMPRESSOR PIPELINE USING COMPUTATIONAL FLUID DYNAMICS IN POWER PLANT TANJUNG ENIM 3X10 MW Septano, Gurruh Dwi Ramadhoni, Tri Satya Sumarna, Herlin compressors pipeline computational fluid dynamics pressure flow Air compressor plays a crucial role by converting electrical energy into kinetic energy in the form of compressed air. This study specifically concentrates on assessing the performance of two compressors that operate alternately, with one compressor in standby mode. Unfortunately, compressor unit #1 faced issues with its drying system, rendering it unable to function within the current pipe network. In order to rectify this, proposed modifications to the pipeline network are introduced and scrutinized. To analyze these modifications, Computational Fluid Dynamics (CFD) is employed to evaluate and compare pressure and flow characteristics in both the existing and modified pipe configurations. The CFD analysis utilizes computer engineering software, with SolidWorks serving as the primary modeling and simulation tool. The assumption is made that the Reynolds number corresponds to laminar flow, factoring in pipe diameter and compressor volume rate.The resulting CFD data offers valuable insights into pressure and velocity distributions within the existing and modified pipeline networks. During the pressure simulation, surface pressure and output on both standard and modified pipes exhibit relatively similar pressure values at 7 bar. However, in the air velocity simulation, surfaces of standard and modified pipes maintain a consistent range of 0 – 5 mm/s. Notably, from the pipe output side, air velocity in standard and modified pipes displays distinct speed contours. Standard pipes show the highest speed between 0.25 – 0.38 mm/s, whereas modified pipes exhibit the highest speed within the range of 0.15 – 0.2 mm/s. This study aims to provide a comprehensive evaluation of the proposed modifications, seeking to enhance understanding of the fluid dynamics within air compressor systems. The outcomes of this research have the potential to contribute significantly to optimizing the performance and efficiency of these systems, thereby offering benefits across various industrial applications. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/2815 10.23917/mesin.v25i1.2815 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 10-20 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/2815/2330 Copyright (c) 2024 Gurruh Dwi Septano, Tri Satya Ramadhoni, Herlin Sumarna https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/2848 2026-01-31T07:56:25Z mesin:ART

EXPERIMENTAL STUDY THE MECHANICAL PROPERTIES OF GMAW WELDING RESULTS ON S355J2+N MATERIAL WITH POST WELD HEAT TREATMENT (PWHT) Arif, Muhammad Yuwono, Indarto Salim, Alfi Tranggono Agus Dharmawan, Alit Zuriah, Dara Lathiful PWHT GMAW S355J2+N sifat mekanik struktur mikro Assembly underframe trains are a connecting process part-part into a system that has a unified function, the process of which uses GMAW-type welding. From the welding results, there is potential for the formation of residual stress which is a problem in this research, so it is minimized using the method Post Weld Heat Treatment (PWHT) thermal. The research aims to determine and analyze the effect of PWHT on the mechanical properties and microstructure of low-carbon steel type S355J2+N resulting from GMAW welding. The research method uses experiments with PWHT temperatures at 450 °C, 750 °C, and non-PWHT to find out the mechanical properties of materials, use the tensile test and micro-Vickers hardness test. Meanwhile, to determine the microstructure formed is used micro examination. The test results, were compared between the welding material with PWHT and the welding material non-PWHT. The results of the research are that the largest tensile strength value of 576 MPa was produced in the material using PWHT at a temperature of 450 °C, the largest elongation of 34.85% was produced in the material with a PWHT temperature of 750 °C, and the highest hardness value was 207.44 HV in the material non-PWHT. The conclusion of the research shows that with increasing PWHT temperature, the hardness and tensile strength values of the material decrease, and there is an increase in the ductility value of the material which is influenced by changes in the dominance of ferrite and pearlite in the material. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/2848 10.23917/mesin.v25i1.2848 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 1-9 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/2848/2328 Copyright (c) 2024 Muhammad Arif, Indarto Yuwono, Alfi Tranggono Agus Salim, Alit Dharmawan, Dara Lathiful Zuriah https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/2896 2025-02-03T18:06:24Z mesin:ART

ANALYSIS OF CUTTING FLUID ON MASS LOSS OF CARBIDE INSERT IN THE MILLING PROCESS Nasution, Arya Rudi Affandi, Affandi Umurani, Khairul Rahmatullah, Rahmatullah Refan, Muhammad Milling Coolant Tool Wear Carbide Insert The Machining process is manufacturing in the world industry that is widely used. The coolant in the machining process functions to lower the temperature and lubricate and clean the gram in the cutting process. The application of coolant in the cutting process is to maintain the quality of the workpiece during the cutting process and also serves to improve tool life so that the tool does not wear out easily. This study aims to determine the effect of a chemical-based coolant based on dromus oil and vegetable CPO on tool wear in the face milling process and to determine whether or not the liquid is effective in reducing and slowing down tool wear. In this research, the face milling process used a grey cast iron specimen as the workpiece specimen used and also used a carbide insert chisel cutting tool with the TPKN 22 VC2 type. The research was carried out by varying the engine speed and also the coolant variation, the engine speed variations used were 80, 360 and 720 Rpm. In the process of administering coolant using the method, it is sprayed directly onto the workpiece area which is cut continuously, in the milling process with a response variable that can be in the form of data or tool wear values that have been observed and tested using a microscope test tool, using the weight (mass) method to see the wear value. This research aims to see how effective the use of vegetable- based coolant (CPO) during experiments as a coolant in the machining process aims to ensure that the final value of tool insert wear must be smaller with (CPO) compared to chemical coolant (dromus). Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/2896 10.23917/mesin.v25i1.2896 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 31-40 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/2896/2332 Copyright (c) 2024 Arya Rudi Nasution, Affandi Affandi, Khairul Umurani, Rahmatullah Rahmatullah, Muhammad Refan https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/3012 2025-02-03T18:23:23Z mesin:ART

CLAMPING DIES DESIGN TO MINIMIZE AUTOMOTIVE COMPONENT DIES SETUP TIME AT PT GANDING TOOLSINDO Purbaningrum, Sanurya Putri Lianny, Indah Kurnia Mahasih Solih, Edwin Sahrial Arohman, Abdul Wahid Satiman , Bayu dies clamping dies design MTM setup dies PT Ganding Toolsindo was faced with the problem of high automotive component die setup times. The main cause of the high setup time is the process of tightening and releasing the bolts which is done manually. The aim of this research is to design a tool for clamping dies which functions to help speed up the bolt installation process, so that the setup time for automotive component dies is reduced. The method used in this research is field observation followed by the die clamping design process. Design planning begins by drawing the object using CAD software based on the results of load calculations and determining the dimensions of the dies themselves and the press machine as well as selecting the dies material. Furthermore, proof was carried out that this die clamping design could reduce dies setup time using movement analysis with a pre-determined time study Measurement Time Method (MTM) method, where the results showed a time saving of 92.4%. Universitas Muhammadiyah Surakarta 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/3012 10.23917/mesin.v25i2.3012 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 2 (2024); 77-84 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/3012/2336 Copyright (c) 2024 Sanurya Putri Purbaningrum, Indah Kurnia Mahasih Lianny, Edwin Sahrial Solih, Abdul Wahid Arohman, Bayu Satiman https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/3224 2025-02-03T18:13:20Z mesin:ART

DESIGN AND ANALYSIS OF CHASSIS FRAME FOR CHOPPER-STYLE MOTORCYCLE Rahmadi, Apri Mursalin, Mursalin custom build motorcycle chopper-style chassis frame Finite Element Method (FEM) Other than being a means of transportation, motorcycles represent a lifestyle for automotive enthusiasts. One way these enthusiasts express their passion is by customizing motorcycles. One common modification involves altering the motorcycle's original form, known as a custom-built motorcycle. There are several types of custom-built motorcycles, including cafe racers, street trackers, scramblers, bobbers, and choppers. Of these types, chopper-style motorcycles typically use a frame chassis which is built from scratch. This research aims to design and analyze the frame of a custom chopper-style motorcycle. The process involves creating a 3D model and analyze the strength of chassis frame using the Finite Element Method (FEM) by using Autodesk Inventor Professional 2022 software. The engine mass supported by the frame is assumed to be 30 kg. The frame is assumed to be ridden solo and with a passenger, resulting in total rider weights of 70 kg, 90 kg, 140 kg, and 180 kg. The result of this research is a chopper motorcycle frame design made of steel, weighing 11.74 kg, capable of supporting a rider's load of up to 140 kg, with a safety factor value of 3.20. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/3224 10.23917/mesin.v25i1.3224 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 64-76 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/3224/2335 Copyright (c) 2024 Apri Rahmadi, Mursalin Mursalin https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/3266 2025-02-03T18:11:11Z mesin:ART

EFFECT OF CYLINDER HEAD GASKET ADDITION AND VARYING OCTANE NUMBER GASOLINE TO INTERNAL COMBUSTION ENGINE PERFORMANCE Rahmat, Bahtiar Wijaya , Mohammad Burhan Rubai Bahtiar, Fahmy Zuhda Wirawan, Yuris Bahadur Muttaqin, Katiko Imamul cylinder gasket octane number compression performance The aim of this research was to investigate the different impacts of compression pressure on power and torque outputs using gasoline RON 92, RON 95, and RON 100. The study involved experiments using a single-cylinder motorcycle engine with a capacity of 125 cm. The selection of this type of engine is based on the popularity of vehicles in Indonesia that use a single-cylinder engine with a capacity of 125 cm. To modify the compression pressure, variations in the number of gaskets were applied to the cylinder head, with quantities of 1 and 3 gaskets. Dynamometer tests were conducted to measure the engine's performance differences. Throughout the testing, the settings for the main jet, pilot jet, and the number of idle screw rotations on the carburetor remain constant. The findings indicate that the engine with the highest compression pressure of 11.8 Kg/cm, using RON 100 gasoline, produces the highest power output at 7.9 kW, with the highest torque at 10 Nm. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/3266 10.23917/mesin.v25i1.3266 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 50-63 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/3266/2334 Copyright (c) 2024 Bahtiar Rahmat, Mohammad Burhan Rubai Wijaya , Fahmy Zuhda Bahtiar, Yuris Bahadur Wirawan, Katiko Imamul Muttaqin https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/3284 2025-02-03T18:09:15Z mesin:ART

EFFECT OF ZIGZAG AND LINE PRINTING PATTERN ON TENSILE STRENGTH AND SURFACE ROUGHNESS OF FUSED DEPOSITION MODELING PRODUCT Sari, Ayu Perwita Rhohman, Fatkur Winata, Ayis Nuredi Herlanto, Frendy Edo Lubis, Abdul Munir Hidayat Syah Anggono, Agus Dwi 3D Printing Poly Lactic Acid (PLA) Filling Pattern Tensile Test This research aims to test the results of 3D printing using Polylactic acid (PLA) filament on surface roughness and tensile strength. Experiments were carried out by adjusting the differences in printing fill density for the pattern used. Filling density uses variations of 60%, 80%, and 100%. The tensile test is used to measure the tensile mechanical properties of polymers (σ). The roughness test is obtained to determine the average surface roughness (Ra), root mean square roughness (Rq), and ten-point height (Rz). The test specimen uses the ASTM D638 type 4 standard model and size. The nozzle diameter is 0.4 mm, the temperature is 220 °C, and the heat bed temperature is 60 °C. The mechanical properties test results of the printing pattern showed that the zigzag pattern had the highest yield strength, maximum load, and elongation values, namely 0.97 N/mm2, 52.99 N, and 9.43%. Meanwhile, in the line pattern, the highest yield strength, maximum load, and elongation values were 1.51 N/mm2, 62.72 N, and 3.54% and the highest yield of the two patterns was in the highest printing pattern, namely 100%. It was concluded that the larger the printing pattern, the wider the filament will be, as a, result the level of surface roughness will also be higher. Universitas Muhammadiyah Surakarta 2024-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/3284 10.23917/mesin.v25i1.3284 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 1 (2024); 41-49 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/3284/2333 Copyright (c) 2024 Ayu Perwita Sari, Fatkur Rhohman, Ayis Nuredi Winata, Frendy Edo Herlanto, Abdul Munir Hidayat Syah Lubis, Agus Dwi Anggono https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/3494 2025-04-22T08:08:47Z mesin:ART

EVALUATION OF ECONOMIZER HEAT TRANSFER IN BOILER RECOVERY UNITS IN PULP FACTORY Panjaitan, Jabosar Ronggur Hamonangan Manurung, Anggun Theresia Galingging, Vanisa Helena Purba, Sasro Arif boiler economizer heat transfer A boiler generates steam by principally exchanging heat. The economizer helps heat the feed water as part of a boiler system. Economizer and boiler functions predictably can improve heat transfer efficiency. Specifically, this study's research method for heat transfer and economizer efficiency of the boiler is in the pulp production plant unit. The heat transfer coefficient and efficiency were calculated based on water temperature and flue gas entering and exiting the economizer. Based on this research, it was found that during the second to fourth-day evaluation, the heat transfer effectiveness and heat transfer coefficient were low. The lowest economizer heat transfer effectiveness on the second day was 72%. Meanwhile, the lowest economizer heat transfer coefficient on the fourth day was 925 W/m2K. The low value of the heat transfer effectiveness and heat transfer coefficient can be caused by scaling in the economizer, so heat transfer was not optimal. The higher the value of heat transfer effectiveness in the economizer, the more flue gas heat will be extracted. Maximum heat transfer can be reached by the economizer cleaning process to remove the scaling, so heat transfer between flue gas and water occurs maximally. Universitas Muhammadiyah Surakarta 2025-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/3494 10.23917/mesin.v26i1.3494 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 1 (2025); 10-15 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/3494/2324 Copyright (c) 2025 Jabosar Ronggur Hamonangan Panjaitan, Anggun Theresia Manurung, Vanisa Helena Galingging, Sasro Arif Purba https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/4349 2025-02-03T18:40:47Z mesin:ART

EFFECTS OF CONTINUOUS AND FRACTURED RIBS PLACED AT THE ENDWALL SURFACE UPSTREAM OF THE TURBINE-VANE LEADING-EDGE Shote, Adeola Suhud Aasa , Samson Abiodun Olakoyejo , Olabode T Bamiduro, Aderemi Musiliudeen vane-blade mid-stream total pressure loss heat transfer Total pressure loss, chaotic and heavy flow downstream of the turbine passage exit area are a few effects of the desired increase in inlet temperature input at the upstream part of the turbine vane passage. Huge amount of energy from the cross-flows near the middle of the vane actual chord are transported downstream by this chaotic flow which often results in aerodynamic loss and differential heat penalties. To compare the different arrangement, comparisons of the two geometries, the impact of adding various rib configurations upstream are studied for heat augmentation efficacies. The leading-edge rib(s) effects at the mid-stream of the vane passage are quantitatively examined in this work using computational fluid dynamics (CFD) technique. With the employment of Reynolds Averaged Navier-Stoke energy equations, the geometries are modelled choosing the appropriate boundary conditions. Polyhedral mesh is used with fifteen prism layer mesh at the endwall and vane surfaces to capture the flow physics close to the endwall area. Although the two configurations employed showed relative reduction in the total pressure loss coefficient, however, the fractured ribs produced superior outcomes of Nusselt number reduction of over 10% along the passage exit region. The data demonstrate a considerable difference in the overall pressure loss between the two configurations. Universitas Muhammadiyah Surakarta 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/4349 10.23917/mesin.v25i2.4349 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 2 (2024); 116-121 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/4349/2340 Copyright (c) 2024 Adeola Suhud Shote, Samson Abiodun Aasa , Olabode T Olakoyejo , Aderemi Musiliudeen Bamiduro https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/4628 2025-02-03T18:28:47Z mesin:ART

STUDY OF INNER AND OUTER POCKET CHARACTERISTICS USING AREA ROUGHING METHOD Suryono, Edy Kristiawan, Y. Yulianto Raharjo, Emanuel Budi Siburian, Jonas Andika Fajar, Jodi Muhammad pocket milling area roughing depth cut step over percent Pocket milling is one of the CNC milling processes. This research aims to analyze the characteristics of pocket milling using Area Roughing on surface roughness and machining time. The method applied is experimental research on the Area Roughing method for working on inner and outer pockets. Research variables include depth cut 0.5, 1, 1.5, and 2 mm, stepover percent 40, 50, and 60%. The test is in the form of surface roughness value, while the analysis of the machining process is the time during the milling process. The workpiece material is 2024 aluminum and a flat endmill tool with a diameter of 12 mm. The expected result is the parameter that has the most optimal value for the processing time and surface roughness value. So it can be a guide for milling processes, especially those that use Area Roughing. The machining results show that the faster machining time results from larger settings for depth cut and stepover percent. Average machining time increase of 28%. Meanwhile, the surface roughness value will increase as the depth cut and stepover settings increase, namely 17.65% for the outer pocket and 18.61% for the inner pocket. The surface roughness value of the ordering results ranges from 2.4-4.8 µm. Universitas Muhammadiyah Surakarta 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/4628 10.23917/mesin.v25i2.4628 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 2 (2024); 85-91 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/4628/2337 Copyright (c) 2024 Edy Suryono, Y. Yulianto Kristiawan, Emanuel Budi Raharjo, Jonas Andika Siburian, Jodi Muhammad Fajar https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/4771 2025-08-15T06:36:39Z mesin:ART

OPTIMIZING PROCESS PARAMETERS FOR FILAMENT 3D PRINTING USING THERMOPLASTIC POLYURETHANE (TPU) WITH RESPONSE SURFACE METHODOLOGY (RSM) Salbiah, Umi Khulsum Shieddique, Apang Djafar Rohman, Rohman 3D printing filament TPU response surface methodology (RSM) 3D Printing utilizes the fabrication process of Fused Deposition Modeling (FDM), which is an Additive Manufacturing (AM) technology that builds objects layer by layer (Pristiansyah et al., 2019). The use of 3D Printing technology has rapidly increased in recent years, significantly contributing to the quality and cost efficiency of prototype production. TPU (Thermoplastic Polyurethane) filament is often used because it produces heavier, harder, and more durable products. Optimizing the 3D printing process is crucial to achieving optimal results, one of which is through the Response Surface Methodology (RSM) method. In this study, RSM was used with 2 factors to find the best response in tensile strength and material hardness of TPU. The experimental results showed that the optimal parameters for tensile strength are a temperature of around 190°C and a print speed of 45mm/m, resulting in a tensile strength of 2.34 kgf/mm². Meanwhile, for maximum hardness, the optimal parameters are a temperature of 214.15°C and a print speed of 45mm/m, with a hardness value of 72.67 HRR. Thus, the RSM method can be an effective approach in improving the 3D Printing results on TPU material. Universitas Muhammadiyah Surakarta 2025-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/4771 10.23917/mesin.v26i2.4771 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 2 (2025); 59-70 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/4771/4114 Copyright (c) 2025 Umi Khulsum Salbiah, Apang Djafar Shieddique, Rohman Rohman https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/4865 2025-04-22T08:09:26Z mesin:ART

FRICTION PRESSURE PREDICTION OF SUPERCRITICAL CO2 TURBULENT FLOW IN A CONCENTRIC ANNULUS Uddin, Md. Hossan, Md. Nahid Ahmed, Mim Mashrur Karal, Raihan supercritical CO2 annulus turbulent flow pressure gradient friction factor comparison This study uses a numerical approach to examine the visual axial pressure gradient and friction factor characteristics of supercritical CO2 turbulent flow in a concentric annulus. The Computational Fluid Dynamics (CFD) software package (FLUENT) was applied for the investigation. The inlet temperature varied from 31 to 110 °C at two operating pressures 9 MPa and 14 MPa. The effect of mass flow rate, annulus clearance, and shaft rotational speed on the pressure gradient and friction factor are investigated. The results show that the pressure gradient is non-linear and the friction factor changes abruptly near the critical point. The effect of mass flow rate and shaft rotational speed on the friction factor is found significant whereas the effect of clearance is insignificant. The friction factor for a given condition is found in the range 0.042-0.029. A one-and-a-half times increase in the friction factor was found when there was a two-time increase in the rotational speed. A satisfactory agreement is obtained between the results predicted by CFD (fluent) when compared with the results predicted by the Darcy Weisbach equation and the Moody diagram and then with the experimental. Hence the Darcy Weisbach equation and Moody diagram can be an effective means of determining the pressure and friction factor respectively for the supercritical CO2 turbulent flow application through the concentric annulus. Universitas Muhammadiyah Surakarta 2025-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/4865 10.23917/mesin.v26i1.4865 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 1 (2025); 26-36 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/4865/2326 Copyright (c) 2025 Md. Uddin, Md. Nahid Hossan, Mim Mashrur Ahmed, Raihan Karal https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/5146 2025-02-03T18:36:13Z mesin:ART

IMPACT OF CHEMICAL REACTION ON MHD BOUNDARY LAYER FLOW OF NANOFLUIDS OVER A NONLINEAR STRETCHING SHEET WITH THERMAL RADIATION HAAR WAVELET COLLOCATION METHOD N, MAHESH KUMAR Awati, Vishwanath B Goravar, Akash MHD chemical reaction stretching sheet thermal radiation Haar wavelet In this paper, we investigate the effects of chemical reaction and thermal radiation on MHD boundary layer fluid flow of nanofluid moving over a nonlinearly stretching sheet through semi-numerical approach. The nanofluid physical model of the problem comprises with effects of thermophoresis, radiation and chemical reaction parameters. The mathematical model scrutinizes mass, momentum, heat transfer and concentration equations are reduced to couple nonlinear ordinary differential equations over infinite domain using proper similarity variables. Haar wavelet collocation method is used to solve the resulting equations. The obtained results are compared with available numerical findings and are comparable which confirms and verifies the wavelet method. The effects of various non-dimensional parameters on the rate of heat and mass transfer are depicted through tables and graphs. It predicts that, the local Sherwood number increases with increase in the parameters of Brownian motion and thermophoresis. For both temperature and volume fraction profiles decreases due to an increase in the Schmidt number. Universitas Muhammadiyah Surakarta 2024-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/5146 10.23917/mesin.v25i2.5146 Media Mesin: Majalah Teknik Mesin; Vol. 25 No. 2 (2024); 100-115 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/5146/2339 Copyright (c) 2024 MAHESH KUMAR N, Vishwanath B Awati, Akash Goravar https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/5241 2025-04-22T08:09:43Z mesin:ART

Synthesizing Iron Atom Doped Carbon Nanotubes Kutelia, Elguja R Bakhtiyarova, Ayten S Bakhtiyarov, Sayavur I polytetrafluoroethylene (PTFE) iron cluster-doped carbon nanotubes (CNT) nanocomposite synthesis Chemical Vapor Deposition (CVD) SEM-EDX analysis electromagnetic shielding One of the main challenges in synthesizing polytetrafluoroethylene (PTFE)-based iron cluster-doped carbon nanotube (CNT) nanocomposites is achieving uniform doping without causing aggregation or phase separation of the iron clusters, which can adversely affect the material’s properties. Iron nanoparticles tend to agglomerate due to their strong magnetic interactions and high surface energy, resulting in inhomogeneous doping that diminishes the effectiveness of the composite in applications like electromagnetic shielding, catalysis, or energy storage. To mitigate this, controlled synthesis techniques such as Chemical Vapor Deposition (CVD) with regulated precursor flow rates or solution-based methods with surfactants can be utilized. Accurate characterization using SEM-EDX analysis is also crucial, although distinguishing iron clusters from the carbon matrix can be difficult due to similar contrast levels. Complementary techniques like transmission electron microscopy (TEM) or X-ray photoelectron spectroscopy (XPS) can provide more detailed structural insights. Universitas Muhammadiyah Surakarta 2025-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/5241 10.23917/mesin.v26i1.5241 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 1 (2025); 37-45 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/5241/2327 Copyright (c) 2025 Elguja R Kutelia, Ayten S Bakhtiyarova, Sayavur I Bakhtiyarov https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/5419 2025-04-22T08:08:18Z mesin:ART

HYDROGEN GAS PRODUCTIVITY FROM PEAT WATER ELECTROLYSIS WITH DISTILLED WATER INJECTED INTO AN INTERNAL COMBUSTION ENGINE (ICE) Julianto, Eko Binyamin, Binyamin Gunarto, Gunarto Rahmadi, Apri Iwan, Muhammad hydrogen gas electrolysis peat water aquades water HHO gas exhaust gas Hydrogen gas is one of the alternative fuels that is currently being widely researched. HHO generator is a tool with the working principle of water electrolysis and is used to produce hydrogen gas. In some studies, peat water has been considered to be used as an electrolyte. This research uses experimental methods to obtain hydrogen gas results from peat water electrolysis. The electrolysis reactor used can handle as much as 400 ml of peat water. The electrodes are stainless steel (SS) with a large cross-sectional area of 0.01884 m2. The electric power used was 12 Volts DC and the time in the electrolysis process was 1 minute. Based on the results of the research that has been done, among others, where the increase in HC in the exhaust gas in Aquades water looks very efficient at the initial rotation at 2000 rpm which produces a thermal efficiency of 60% While in peat water the increase in HC in the exhaust gas in Aquades water looks very efficient at the initial rotation at 2000 rpm which produces a thermal efficiency of 90%. The influence of rpm and the unstable rotation of rpm causes the CO value in the exhaust gas of the vehicle to be unstable where at low rotation readings 223. 24 ppm, middle 634.94 ppm and top 606.89 ppm, it can be seen that in the upper round the value even decreases from the middle round, while in HHO peat water when the low round reading is 104.4 ppm, middle 101.94 ppm and top 121.29 ppm, it can be seen that in the upper round the value increases from the initial round to the top. Universitas Muhammadiyah Surakarta 2025-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/5419 10.23917/mesin.v26i1.5419 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 1 (2025); 1-9 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/5419/2323 Copyright (c) 2025 Eko Julianto, Binyamin Binyamin, Gunarto Gunarto, Apri Rahmadi, Muhammad Iwan https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/6108 2025-04-22T08:09:07Z mesin:ART

THE EFFECT OF VARIATIONS IN PVC FOAM CORE THICKNESS ON THE FAILURE ANALYSIS OF BENDING TEST IN SANDWICH COMPOSITE Rodian, Afiko Paundra, Fajar Afisna, Lathifa Putri Nurullah, Fajar Perdana Pujiyulianto, Eko sandwich composite core thickness bending strength modulus elasticity vacuum bagging PVC foam The composite sandwich core is one of the parts that act as an additional material. Despite the thinner core, it should produce a stiff, strong, and lightweight composite, and the higher the bending strength value obtained. This study aims to observe and analyze the influence of core thickness on bending strength and obtain elastic modulus as well as analyze the results of sandwich composite fracture after bending testing. The materials used are polyester resin, 240 gsm twill carbon fiber and core PVC foam. Variations in core thickness of 2 mm, 3 mm, 5 mm, 8 mm, and 10 mm. The method used is vacuum bagging. The tests carried out are bending tests using the ASTM C393 standard. The bending strength value of sandwich composite was obtained at a core thickness variation of 2 mm, which was 81.34 MPa, while the lowest bending strength value was found in a core thickness variation of 10 mm, which was 13.08 MPa. Universitas Muhammadiyah Surakarta 2025-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/6108 10.23917/mesin.v26i1.6108 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 1 (2025); 16-25 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/6108/2325 Copyright (c) 2025 Afiko Rodian, Fajar Paundra, Lathifa Putri Afisna, Fajar Perdana Nurullah, Eko Pujiyulianto https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/6977 2025-11-26T06:29:20Z mesin:ART

DESIGN AND SAFETY FACTOR SIMULATION OF AN AUTOMATED FEEDER FOR BLANKING MACHINES Wijayanto, Hendi Lilih Zulfianti Yusdianto S, Hairun Apriadi Ramadhan Usman simulation feeder blanking safety factor design The displacement of the stainless-steel plate to the printing work area is still managed manually by theoperator. Additionally, there is no clear benchmark to determine whether the plate is in the correct position andaligned according to the printed pattern. Thus, the print results are frequently less than perfect and require a longprocess. To address these conditions, an additional feeder is required with an automatic system that can operatein conjunction with the blanking machine, simplifying the operator's work and enhancing the blanking processefficiency. The objectives of this research are to determine the design of the feeder machine design by the needsand specifications of the machine, to discover the value of the safety factor of the Feeder machine design, and toreveal the movement system of the Feeder machine design using SolidWork 2019. This final project was carriedout in June 2023 at Politeknik Industri Logam Morowali (PILM) in Labota Village, Bahodopi District, MorowaliRegency, Central Sulawesi Province. The results show that: Researchers can make a design with the provisionsof a length of 550 mm and a width of 250 mm, while the known safety factor value for both areas is declared safesince it has Factor of Safety (FOS) value of 1 and the design movement system displayed on the animation systemin SolidWork 2019 software. Universitas Muhammadiyah Surakarta 2025-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/6977 10.23917/mesin.v26i2.6977 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 2 (2025); 98 - 111 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/6977/4684 Copyright (c) 2025 Hendi Lilih Wijayanto, Zulfianti, Yusdianto, Hairun Apriadi Ramadhan S, Usman https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/8587 2026-04-22T06:55:05Z mesin:ART

STUDY ON THE INFLUENCE OF THE ANGULAR DIRECTION OF ALUMINUM COOLING FINS ON THE WORKING TEMPERATURE OF SOLAR PANELS Binyamin, Binyamin Riswan, Muhammad Nugroho, Andi Julianto, Eko solar panel aluminium cooling fin fin angle solar panel temperature The utilization of solar energy through solar panels as a source of electrical energy for households and street lighting is increasing rapidly. However, solar panels face problems related to working temperature. When the absorption of solar radiation is too high, it results in a decrease in efficiency. High temperatures cause solar panels to produce lower energy than in cold conditions. Therefore, the purpose of this study was to explore the effect of aluminum cooling fins on solar panels, with variations of fin inclination angles of 30° and 45°, and compared with panels without a cooling system to reduce the working temperature of solar panels by using cooling fins and air blowing media. The results showed that at an angle of 30°, the panel temperature was 43.60°C at the 13th iteration, with a temperature drop of about 3.13%. At an angle of 45°, the temperature obtained was 41.80°C with a temperature drop of about 6.68%. Meanwhile, the uncooled condition reached a maximum temperature of 44.40°C. No cooling causes the panel temperature to be higher, and the 45° angle provides a better cooling effect than the 30° angle, although the difference is not very significant when compared to the uncooled condition. Universitas Muhammadiyah Surakarta 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/8587 10.23917/mesin.v27i1.8587 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 1 (2026); 9-21 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/8587/5203 Copyright (c) 2026 Binyamin Binyamin, Muhammad Riswan, Andi Nugroho, Eko Julianto https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/8738 2025-08-15T06:32:33Z mesin:ART

NUMERICAL AND ANALYTICAL ANALYSIS OF THE SHAFT DESIGN FOR A ROTATING DRUM BIOREACTOR USING STAINLESS STEEL 304 MATERIAL Putero, Gladion Alim Affandy, Rahmat Fauzi, Mochamad Zain, Fikri Isya Prabawanto, Moch. Nur Irsyad Faizin, Ahmad Khairul safety factor von mises rotating drum bioreactor stainless steel 304 FEM The safety factor and Von Mises stress need to be analyzed so that the components remain safe against combined stress and the risk of failure due to dynamic loads and unexpected conditions. This study aims to analyze the safety factor and von mises of the shaft design on a rotating drum bioreactor using 304 stainless steel material. This machine is designed to support the shrimp paste fermentation process using the Solid State Fermentation (SSF) method. The analysis process is carried out through simulation using the finite element method (FEM) to evaluate the stress distribution and safety factor value on the shaft. The simulation results show that the von mises value or maximum stress on the shaft is 10.98 N/mm², still below the yield strength of 304 stainless steel material of 205 N/mm². The minimum safety factor obtained from the analysis is 19, indicating that this design is safe to withstand loads during the operation process. In addition, the results of the numerical analysis using manual calculations obtained a maximum shaft stress value of 10.95 N/mm² with a minimum safety factor value of 18.7. Through a comparison of the results of the analytical simulation analysis and manual numerical calculations, a machine design with a level of reliability and structural safety that is considered safe, as well as minimizing the risk of mechanical failure.   Universitas Muhammadiyah Surakarta 2025-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/8738 10.23917/mesin.v26i2.8738 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 2 (2025); 46-58 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/8738/4113 Copyright (c) 2025 Gladion Alim Putero, Rahmat Affandy, Mochamad Fauzi, Fikri Isya Zain, Moch. Nur Irsyad Prabawanto, Ahmad Khairul Faizin https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/9853 2026-08-16T11:12:30Z mesin:ART

ANALYSIS OF PROCESS PARAMETERS OF THE ENDER-3 V2 SERIES 3D PRINTER ON THE TENSILE AND COMPRESSIVE STRENGTH OF PLA FILAMENT TEST SPECIMEN USING TAGUCHI METHOD Diratama, Mohammad Yazid Nadi, Muhammad Rizki Gorbyandi Ariefijanto, Dedy Maulana, Irfan Suhendri, Andri FDM (Fused Deposition Modeling) tensile strength compressive strength Taguchi Method process parameters polylactic acid FDM (Fused Deposition Modeling) has emerged as one of the most popular additive manufacturing technologies in recent years, possessing the capability to produce objects with intricate designs. In this process, the object is constructed layer by layer using thermoplastic polymer materials. One notable FDM machine is the Ender-3 V2 series 3D printer. The strength and quality of the printed object are influenced by key process parameters, namely infill density, printing speed, and wall thickness. This research aims to analyze the impact of these process parameters; infill density, printing speed, and wall thickness on the tensile and compressive strength of polylactic acid (PLA) using the Taguchi Method. Standard specimens of ASTM D638 and ASTM D695, printed on the Ender-3 V2 series 3D printer, were employed. The Taguchi L4(23) orthogonal array design incorporated a combination of process parameters: infill density (50, 75) %, printing speed (30, 60) mm/s, and wall thickness (0.8, 1.2) mm, representing the quality of the printed parts. The results indicate that the compressive strength response is primarily influenced by infill density, while the tensile strength response is predominantly influenced by wall thickness. Thus, it can be concluded that lower printing speeds produce higher tensile and compressive strengths. The object density is greatly influenced by infill density and wall thickness, as confirmed by the results of microstructural examination. Universitas Muhammadiyah Surakarta 2026-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/9853 10.23917/mesin.v27i2.9853 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 1-9 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/9853/6193 Copyright (c) 2026 Mohammad Yazid Diratama, Muhammad Rizki Gorbyandi Nadi, Dedy Ariefijanto, irfan Maulana, Andri Suhendri https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/9939 2026-04-22T06:55:05Z mesin:ART

THE EFFECT OF USING DUST AS A BENTONITE SUBSTITUTION ON THE CHARACTERISTICS OF RECYCLED GREENSAND MOLDS Hariningsih, Hariningsih Rizka, Tasha using dust metal casting molding sand greensand green compression strength The metal casting industry faces global challenges in managing greensand dust waste containing silica and clay from bentonite and silica sand, which has the potential to cause environmental and health impacts. Therefore, this study analyzes the effect of greensand dust utilization on the characteristics of greensand molds made from return sand. Additionally, this study aimed to ascertain the ideal percentage of dust required to attain the maximum green compression strength (GCS) value. This study examined dust usage variations of 0%, 15%, 30%, and 45% relative to the weight of bentonite. When calculated based on the weight of sand, these proportions translate to 0%, 0.09%, 0.18%, and 0.27%. The sand underwent several tests, including assessments for compactibility, moisture, permeability, grain fineness number (GFN), green compression strength (GCS), dry compression strength (DCS), wet tensile strength (WTS), active clay, volatile combustible material (VCM), and loss on ignition (LOI). The application of dust from greensand molds in the metal casting sector suggests that this dust can effectively replace bentonite. The ideal formulation for the molding sand includes 100% return sand, 0.42% bentonite, 0.18% dust, and 2.9% water. Specifically, the most efficient binder combination consists of 70% bentonite and 30% dust. This particular mixture achieves the highest GCS of 13.4 N/cm². A greater GCS value signifies that the molding sand possesses an improved ability to withstand the pressure from the molten metal during the pouring process. Universitas Muhammadiyah Surakarta 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/9939 10.23917/mesin.v27i1.9939 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 1 (2026); 1-8 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/9939/5201 Copyright (c) 2026 Hariningsih Hariningsih, Tasha Rizka https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/10390 2025-11-26T06:45:40Z mesin:ART

DESIGN AND CFD ANALYSIS OF 1 KW PICO HYDROPOWER SIMULATOR WITH CENTRIFUGAL WATER PUMP AND FRANCIS TURBINE Sutisna, Nanang Ali Aditama, Fauzan Yasa Simulation is essential for a design study. This article illustrates the result of a research aimed to design andbuild a Pico Hydro Generator simulation system using a water pump as a source of water flow. Pico HydroGenerator is a small-scale power generation technology that utilizes water energy as a renewable energy resource.Through this simulation system, the design and testing of the Pico Hydropower simulator design can be carriedout to determine the efficiency value of the design. The planning process begins by determining the specificationsof the water turbine to be used, including water discharge, headwater, and the required capacity. Based on thesedata, it is possible to select the type of water pump that is suitable for the needs of the turbine. Then the design ofPico Hydropower components such as turbines, generators, water tanks, water channels, and system panels isdesigned. The design process uses CAD (Computer Aided Design) software to design parts and assemblies on thesimulator. Then the design performance will be analyzed using Computational Fluid Dynamic (CFD) software.The final result of this study is a Pico Hydropower simulator design that has been optimized and can be simulatedby using a water pump as a flow source. This simulation system can allow research and development in the formof learning tools for students to understand how Pico Hydro power plants work and how to calculate theirefficiency. Universitas Muhammadiyah Surakarta 2025-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/10390 10.23917/mesin.v26i2.10390 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 2 (2025); 85-97 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/10390/4686 Copyright (c) 2025 Nanang Ali Sutisna, Fauzan Yasa Aditama https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/11804 2026-08-20T04:01:50Z mesin:ART

EVALUATION OF CORROSION UNDER INSULATION AND REMAINING LIFE OF CARBON STEEL PIPELINES Muhammad Syukron Dahniar Muhammad Rizky Fajarullah Aura Wulanuari Kikin Hermanto Analysis of Corrosion Under Insulation (CUI) and calculation of the remaining life of corroded pipes of A-106-B material is carried out based on API 571, and ASME B31.3 standards which aim to determine the operational and environmental parameters for the formation of CUI on the pipeline. The tests used include chemical composition test using Positive Material Identification type portable OES and XRF, pipe thickness testing using Ultrasonic Thickness and microscope, corrosion deposit on the pipes was tested using SEM-EDX, hardness testing using Micro Vickers Hardness Test. The results of the analysis showed that the pipe had corrosion in the Outside Diameter (OD) which was categorized as CUI. The corrosion products on the outside of the pipe surface that are formed are Fe2O3 and Fe3O4. The result of the hardness value in the specimen is influenced by the surrounding environment which causes the specimen to become harder. The calculations of the remaining life of the pipes are 2.0, 5.4 and 9.2 years for NG, CG and CH pipes respectively. Universitas Muhammadiyah Surakarta 2026-08-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/11804 10.23917/mesin.v27i2.11804 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 76-91 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/11804/6308 Copyright (c) 2026 Muhammad Syukron, Dahniar, Muhammad Rizky Fajarullah, Aura Wulanuari, Kikin Hermanto https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/12059 2026-03-06T05:52:15Z mesin:ART

DEVELOPMENT AND ANALYSIS OF A 7040 PROPELLER AIRSCREW TEST BENCH USING EXPERIMENTATION AND CFD Sarjito, Sarjito Prabowo, Anggit Bayu Wijianto, Wijianto Junaidin, Buyung 7040 Propeller performance static thrust CFD simulation ANSYS CFX experimental validation test bench This study presents a performance evaluation of a 7×4 propeller using both experimental and computational approaches. A test bench was developed to measure static thrust and power consumption across various rotational speeds (RPM), while Computational Fluid Dynamics (CFD) simulations were performed using ANSYS CFX to analyze the aerodynamic behavior and thrust generation under identical conditions. The experimental setup employed an Arduino-based system integrated with sensors for thrust, voltage, current, and RPM measurements. Thrust values increased proportionally with RPM, reaching a maximum of 2.7468 N at 9000 RPM. In comparison, the CFD simulation predicted a higher thrust of 3.6358 N at the same speed. Although some deviations were observed—particularly at higher RPMs—the overall trends between experimental and CFD results were consistent, indicating that both methods effectively capture the propeller’s performance characteristics. The findings confirm that the test bench provides reliable measurements under static conditions and that CFD can serve as a predictive tool for propeller performance. Further improvements through dynamic testing and simulation refinement are recommended to enhance accuracy and represent real-world flight conditions. Universitas Muhammadiyah Surakarta 2025-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/12059 10.23917/mesin.v26i2.12059 Media Mesin: Majalah Teknik Mesin; Vol. 26 No. 2 (2025); 71-84 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/12059/5335 Copyright (c) 2025 Sarjito Sarjito, Anggit Bayu Prabowo, WIjianto, Buyung https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/12615 2026-04-22T06:55:05Z mesin:ART

ENHANCEMENT OF HEAT TRANSFER PERFORMANCE OF FLAT VERTICAL TUBE USING SIO2/WATER NANOFLUIDS Saputra, Eqwar Surono, Arif Prasetyo, Andi Afifah, Dini Nur Aripin, Janatin Nur nanofluid heat transfer temperature radiator This research aims to evaluate the heat transfer characteristics of a radiator using silicon dioxide (SiO2) nanofluid. The study was conducted experimentally, and the research scheme consisted of a water/nanofluid reservoir tank, a heater for water heating, a pump to circulate water/nanofluid to the radiator, and a cooling fan to dissipate heat. The research results indicate a 15% increase in the average heat transfer coefficient at a temperature of 60°C. The maximum heat transfer enhancement occurred at a concentration of 0.2%, with a 21% increase at a Reynolds number of 3200 at a temperature of 60°C. At a temperature of 70°C, there was an 18% increase in the average heat transfer coefficient. The maximum heat transfer enhancement occurred at a concentration of 0.2%, with a 24% increase at a Reynolds number of 3200. Universitas Muhammadiyah Surakarta 2026-02-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/12615 10.23917/mesin.v27i1.12615 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 1 (2026); 22-30 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/12615/5334 Copyright (c) 2026 Eqwar Saputra https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/13553 2026-08-19T09:45:08Z mesin:ART

PERFORMANCE EVALUATION OF A SMALL-SCALE LPG ALUMINIUM MELTING FURNACE USING FOUR-LAYER REFRACTORY INSULATION Hariningsih Syamsudin, Arif Darmawan, Bangun Rifki aluminium daur ulang peleburan tungku insulasi Aluminium scrap derived from automotive and industrial machinery components holds considerable potential for recycling; however, small and medium enterprises (SMEs) and vocational institutions still need compact, thermally efficient melting furnaces. This study outlines the design, thermal performance analysis, and experimental assessment of a 7 kg LPG-fired aluminium melting furnace, which features a four-layer refractory lining made up of ceramic fibre paper, ceramic fibre blanket, ceramic fibre board, and LCF384A insulating castable. The furnace includes a combustion chamber with a diameter of 280 mm and a height of 320 mm, along with a steel crucible that measures 165 mm in diameter and 233 mm in height. Thermal analysis indicated that the crucible offers an effective volume of 3.49 dm³, which corresponds to a capacity of 9.44 kg of solid aluminium and 8.05–8.24 kg of molten aluminium. The multilayer refractory lining achieved an overall thermal resistance of 0.809 K/W, leading to an estimated conductive heat loss of around 1.195 kW at a furnace temperature of 1000 °C. Six melting trials were performed using aluminium scrap from pistons, engine blocks, and textile machines. The furnace successfully melted 7 kg of aluminium within a time frame of 1380–1965 seconds (23.0–32.8 minutes) while consuming between 2.0 and 3.2 kg of LPG. The combustion parameter (λ) varied from 1.02 to 1.21, indicating stable and clean combustion. Optical emission spectroscopy revealed that the recycled engine block and piston alloys had chemical compositions that were closest to those of commercial casting aluminium alloys, although additional Cu is necessary to fully meet standard specifications. The proposed furnace exhibits dependable thermal performance, minimal conductive heat loss, and stable melting characteristics, making it ideal for vocational education and small-scale aluminium casting applications. Universitas Muhammadiyah Surakarta 2026-08-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/13553 10.23917/mesin.v27i2.13553 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 45-49 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/13553/6294 Copyright (c) 2026 Hariningsih, Arif Syamsudin, Bangun Rifki Darmawan https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/15652 2026-08-16T11:09:36Z mesin:ART

ANALYSIS OF THE CAPABILITY OF FIBER METAL LAMINATE COMPOSITES AS BULLETPROOF VEST MATERIAL USING FINITE ELEMENT METHOD Amme, Rudi Muhammad Syahid Hairul Arsyad Lukman Kasim aluminium composite projectile vest simulation This study analyzes the capability of Fiber Metal Laminate (FML) composites as bulletproof vest materials using the Finite Element Method (FEM) by varying the position of the aluminum layers on the composite plate. The material consists of 25 layers with an aluminum configuration at the front, middle, and back. The project Element Method (FEM) involves varying the position of the aluminum layer on the composite plate. The material consists of 25 layers with aluminum configurations at the front, center, and rear. A 9 mm diameter projectile model was used to simulate the impact and analyze the kinetic energy reduction of the bullet. The simulation results show that the aluminum position at the front produces the fastest kinetic energy reduction and the lowest residual energy of 128.726 J, while the middle and rear positions produce 156.566 J and 129.585 J, respectively. All configurations meet the safety limits of the National Institute of Justice (NIJ) with residual energy values below 170 J. These results indicate that the position of the metal layer significantly affects impact energy absorption capacity. The combination of aluminum and composite fibers in the FML structure effectively distributes impact energy through matrix cracking, fiber fracture, and delamination mechanisms. Thus, FML composite has the potential to become an alternative material for bulletproof vests that are lightweight, strong, and efficient in protecting the body from projectile penetration. Universitas Muhammadiyah Surakarta 2026-08-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/15652 10.23917/mesin.v27i2.15652 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 60-66 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/15652/6295 Copyright (c) 2026 Rudi Amme, Muhammad Syahid, Hairul Arsyad, Lukman Kasim https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/16145 2026-04-22T06:55:05Z mesin:ART

STRUCTURAL AND OPTICAL CHARACTERIZATION OF HEAT-TREATED SIC PARTICLES DERIVED FROM RICE HUSK ASH FOR PHOTOVOLTAIC Riza, Ramzul Irham Ngafwan Masyrukan Krisnoadi, Ridwan Kurniawan, Adhyaka Billy Silicon carbide nanoparticles heat treatment UV-Vis spectroscopy solar panel light absorbance This study explores the potential of nanoscale silicon carbide (SiC) particles synthesized from rice husk ash to enhance light absorption characteristics in solar panel applications. The SiC particles were produced by burning rice husks, followed by purification and division into two groups: one group underwent heat treatment at 400 °C, while the other was kept untreated for comparative analysis. High-Energy Milling (HEM) for 60 hours was used to reduce the particle size of selected samples. Comprehensive characterization was performed using Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and UV-Vis spectroscopy in the wavelength range of 200–1100 nm. The results of the study indicate that heat-treated SiC exhibits significantly reduced agglomeration and better particle dispersion compared to untreated samples. FTIR analysis confirmed the presence of additional functional groups (C=C and O–H) in the treated SiC, which contribute to surface chemical modification. Most importantly, the UV-Vis spectra show that the treated SiC maintains consistently higher absorbance values (0.5–0.6) in the visible to near-infrared region (400–1100 nm), whereas the untreated SiC exhibits a decreasing trend (0.4–0.2). These findings suggest that thermal processing can enhance the optical performance of SiC nanoparticles by improving dispersion and introducing functional groups that strengthen light-matter interactions. The superior absorption characteristics of the processed SiC demonstrate promising potential as an additive or nanostructured layer to improve photon capture and overall efficiency in photovoltaic devices Universitas Muhammadiyah Surakarta 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/16145 10.23917/mesin.v27i1.16145 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 1 (2026); 31-41 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/16145/5496 Copyright (c) 2026 Ramzul Irham Riza, Ngafwan, Masyrukan, Ridwan Krisnoadi, Adhyaka Billy Kurniawan https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/16440 2026-08-20T08:57:35Z mesin:ART

DEVELOPMENT AND PRELIMINARY CHARACTERISATION OF A MULTI-ORIENTATION PROPELLER TEST BENCH FOR STATIC THRUST-VECTOR MEASUREMENT IN TILT-CAPABLE UAV APPLICATIONS Junaidin, Buyung Agung Prakoso Sarjito Harmanto, Dani Nugroho, Adam Ghuthruf Thoriq, Dana Fitra UAV propulsion tilt-capable UAV propeller test bench thrust vectoring experimental instrumentation This study develops and preliminarily characterises a low-cost multi-orientation propeller test bench for static thrust-vector measurements relevant to tilt-capable unmanned aerial vehicle (UAV) propulsion research. The platform combines a servo-actuated 0-90 degree tilt mechanism, an Arduino Uno data-acquisition unit, nominal 1 kgf load-cell instrumentation with HX711 conditioning, an MPU6050 orientation sensor, RPM monitoring, and an inline electrical power meter. The prototype was evaluated using a 63.5 mm HQProp T63-6 propeller driven by an iFlight XING 1404 4600 KV motor at discrete tilt angles of 0, 30, 45, 60, and 90 degrees over several rotational-speed settings. The preliminary measurements show the expected redistribution of the propulsion-force vector in the laboratory reference frame: the horizontal component is dominant at 0 degrees, the vertical component is dominant at 90 degrees, and approximately balanced components occur near 45 degrees. Increasing rotational speed increases the measured force magnitude across the tested orientations. The present experiment is intentionally interpreted as static multi-orientation force-vector characterisation rather than a reproduction of transition-flight aerodynamics, because no external freestream was imposed. The results demonstrate the practical functionality of the rotating test-bench architecture and its suitability as a foundation for more rigorous propulsion-system characterisation. Universitas Muhammadiyah Surakarta 2026-08-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/16440 10.23917/mesin.v27i2.16440 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 67-90 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/16440/6309 Copyright (c) 2026 Buyung Junaidin, Agung Prakoso, Sarjito https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/16506 2026-08-16T11:06:45Z mesin:ART

GEOMETRIC DESIGN OPTIMIZATION OF SUBMERSIBLE PUMP CASING FOR IMPROVED STRUCTURAL STRENGTH AND EROSION RESISTANCE UNDER FLUID FLOW USING FEA AND CFD APPROACHES Muslim, Dede Buchori Rahmi, Meri Ramdhani, Muhammad Rifky Hidayat, Reza Yadi Nahrowi, Muhammad Soetopo, Antonius Adi Komara, Asep Indra Mudji S, Paulus Pump Casing Submersible Computational Fluid Dynamics (CFD) Finite Element Analysis (FEA) Geometry Variations Reverse Engineering The structural performance of submersible pump components, particularly the casing, is influenced by its geometric configuration and the impact of fluid flow. Premature damage to submersible pump casings in mining environments is often triggered by the interaction of fluid flow with erosive solid particles. This study analyzes the effect of variations in the internal geometry of the submersible pump casing on the durability of FCD 700 cast iron materials. The method used in this study is the integration of Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA). The reverse engineering process to obtain a 3D model of the existing pump, followed by fluid flow simulations to obtain pressure distribution, and continued with structural analysis to determine the Von Mises stress and Safety Factor. Variations in geometric parameters such as bend radius (R-bend), chamfer angle (C-angle), and inlet radius (R-in) are analyzed against the distribution of pressure, stress, and particle erosion rate. CFD simulations are performed to analyze the pressure distribution resulting from internal flow conditions, which are then applied as boundary conditions in the FEA model to evaluate the resulting stress and deformation. Simulation results show that geometric changes significantly affect stress concentrations and erosion patterns in critical areas of the casing. Geometry with smoother curved transitions can reduce maximum stress and erosion potential compared to existing designs. These findings contribute to the optimization of submersible pump casing designs to increase service life and operational reliability in mining industry applications. Universitas Muhammadiyah Surakarta 2026-08-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/16506 10.23917/mesin.v27i2.16506 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 10-29 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/16506/6194 Copyright (c) 2026 Dede Buchori Muslim, Meri Rahmi, Muhammad Rifky Ramdhani, Reza Yadi Hidayat, Asep Indra Komara, Muhammad Nahrowi, Antonius Adi Soetopo, Paulus Mudji S https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/16601 2026-08-11T07:26:24Z mesin:ART

TECHNO-ECONOMIC STUDY OF PV INTEGRATION INTO A GAS ENGINE-BASED POWER SYSTEM CONSIDERING CURTAILMENT IMPACT: A CASE STUDY OF THE ALOR POWER SYSTEM Prihananto, Adiartha Susanto, Edy LCOE PLTS PV hybrid renewable energy The Solar PV capacity addition target in the 2025–2034 Electricity Supply Business Plan (RUPTL) is set at 17.1 GW. The Alor Power System has one of the highest solar irradiation potentials, reaching approximately 6 kWh/m²/day; however, no grid-connected photovoltaic (PV) plant has yet been deployed in the system. This study investigates the technical and economic feasibility of integrating Solar PV into the existing gas engine-based power system by utilizing the former constrained power plant site in Alor. The evaluation considers three PV penetration scenarios 15%, 20%, and 30% of daily energy demand simulated using HOMER Pro and integrated with the existing 10 MW gas engine power plant (GEPP). Unlike previous studies, this research contributes by evaluating the interaction between PV penetration, curtailment losses, and system-level LCOE to determine an economically optimal renewable penetration limit for an isolated gas-engine-dominated grid. The simulation results indicate that higher PV penetration reduces fuel consumption and operational costs of the gas engine plant but leads to significant daytime curtailment. Among the evaluated scenarios, 20% PV penetration yields the lowest LCOE at IDR 3,334/kWh, outperforming both the 15% and 30% scenarios as well as the GEPP-only base case (IDR 3,435/kWh). The findings demonstrate that a hybrid system configuration with 20% PV penetration and a 10 MW gas engine plant provides the most optimal LCOE for the Alor Power System. This configuration is therefore considered technically and economically feasible to support the national PV capacity expansion target of 17.1 GW under the 2025–2034 RUPTL. Universitas Muhammadiyah Surakarta 2026-08-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/16601 10.23917/mesin.v27i2.16601 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 2 (2026); 30-44 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/16601/6280 Copyright (c) 2026 Adiartha Prihananto, Edy Susanto https://creativecommons.org/licenses/by/4.0

oai:ojs2.journals2.ums.ac.id:article/16741 2026-04-22T06:55:05Z mesin:ART

NUMERICAL INVESTIGATION OF THICKNESS AND MATERIAL EFFECTS ON THE MECHANICAL BEHAVIOR OF MILD STEEL DAMPERS USING FINITE ELEMENT ANALYSIS Yasin, Iskandar Sutrisno, Widarto Hasan, Nurul Soumi, Andi Ibrahim Mild Steel Damper Finite Element Analysis Plate Thickness Variation Material Properties Mechanical Behavior Mild steel dampers are widely utilized as energy dissipation devices due to their ductility and stable mechanical behavior. This study presents a numerical investigation of the effects of plate thickness and material variation on the mechanical performance of an H-type mild steel damper using nonlinear finite element analysis. The model is developed in ANSYS with three-dimensional solid elements, incorporating material and geometric nonlinearity to capture structural response under loading. Two parametric studies are conducted, including plate thickness variations (15 mm, 20 mm, 25 mm, and 30 mm) and material variations (structural steel, grey cast iron, and aluminum alloy). The mechanical behavior is evaluated based on deformation, equivalent stress, and strain distribution along the damper height. The results show that increasing plate thickness significantly reduces deformation and strain while improving stress distribution, indicating enhanced structural stiffness. However, excessive thickness may limit deformation capacity. In terms of material performance, structural steel exhibits the most stable behavior with low deformation and controlled stress and strain distribution. Aluminum shows higher deformation and strain due to its lower stiffness, while grey cast iron demonstrates limited ductility and higher stress concentration. An optimal configuration is identified at a thickness of 20-25 mm using structural steel, providing a balance between stiffness and deformation capability. These findings contribute to the design optimization of metallic dampers for structural applications. Universitas Muhammadiyah Surakarta 2026-01-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://journals2.ums.ac.id/mesin/article/view/16741 10.23917/mesin.v27i1.16741 Media Mesin: Majalah Teknik Mesin; Vol. 27 No. 1 (2026); 42-67 2541-4577 1411-4348 eng https://journals2.ums.ac.id/mesin/article/view/16741/5546 Copyright (c) 2026 Iskandar Yasin, Widar Sutrisno, Nurul Hasan, Andi Ibrahim Soumi https://creativecommons.org/licenses/by/4.0