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Media Mesin: Majalah Teknik Mesin
Published by Universitas Muhammadiyah Surakarta
ISSN : 14114348     EISSN : 25414577     DOI : 10.23917/mesin
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 24, No 1 (2023)" : 5 Documents clear
THE EFFECT OF WEBBING ANGLE ORIENTATION ON PHYSICAL AND MECHANICAL PROPERTIES OF BOEHMERIA NIVEA FIBER COMPOSITES Fajar Perdana Nurrullah; Fajar Paundra; Anas Maulana; Abdul Muhyi; Akhmad Nurdin; Indriyani Indriyani
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.18406

Abstract

Composites are a combination of two or more different materials with different mechanical properties. The purpose of this research was to determine the effect of the angle orientation of the Boehmeria Nivea fiber-reinforced composite woven on the physical and mechanical properties. Boehmeria Nivea fiber is soaked in an alkaline solution and made into ropes with a diameter of 2-3 mm and then woven with angle orientations of 0o/15o, 0o/30o, 0o/45o and 0o/90o. The composite manufacturing process uses the press molding method. The tests in this study consisted of a tensile test with the ASTM D3039 standard, a flexural test with the ISO 178 standard and a density test with the ASTM C271 standard. Tensile test results show that the highest tensile strength occurs at 0°/15° webbing angle orientation, which is 13.77 Mpa. While the highest bending test results occur at the orientation of the 0°/15° webbing angle, which is 60.52 MPa. Tensile and flexural strength increases with smaller webbing angle orientation.
COMPUTATIONAL FLUID DYNAMIC (CFD) SIMULATION ON REDESIGN BAFFLES OF YOGYAKARTA INTERNATIONAL AIRPORT TRAIN FUEL TANK Putri Novia; Bi Asngali; Agus Susanto; Riant Adzandy; Hedi Purnomo
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.19591

Abstract

The tank is one of the most important components in the train which serves as a place to store train fuel. However, so far the tank has been a component that has gone unnoticed, even though there is a very important issue to consider, namely how the fluid moves in the tank due to the movement of the train while moving. The free movement of the liquid fluid in a tank is called sloshing. Sloshing in the tank can be reduced by adding anti-sloshing in the tank called component baffles. So it is necessary to simulate the sloshing due to the movement of the train by taking into account the value of the vehicle subsystem of the train and the variation of the baffles design used. There are several models of fuel tank baffles used in this study, namely fuel tanks without baffles; longitudinal baffles (2) lateral baffles (1) - existing baffles; longitudinal baffles (3) lateral baffles (3) with circular perforations; and horizontal (2) lateral (1) baffles with circular perforations. This study aims to provide a baffles design configuration that can optimally reduce the sloshing that occurs. So in this study, a simulation of the fuel tank with variations in the baffles was carried out by applying the Computational Fluid Dynamic (CFD) method. From the simulation results, it is concluded that the configuration of longitudinal baffles (3) lateral baffles (3) has the best performance with an effectiveness of 34.33% in reducing sloshing.
THE IMPACT OF CHROME PLATED COPPER CATALYTIC CONVERTERS ON ENGINE PERFORMANCE WAS EVALUATED BY CHASSIS DYNAMOMETER EXPERIMENT Sudirman Rizki Ariyanto; Retno Wulandari; Suprayitno Suprayitno; Muhammad Yandi Pratama; Ata Syifa’ Nugraha
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.19679

Abstract

Emissions produced by motorized vehicles greatly contribute to various environmental and health problems. One technology that is currently being developed to reduce the number of emissions in the environment is the catalytic converter. This technology is proven to be able to reduce exhaust emissions well, but how big the impact on engine performance (torque and power) still needs further research. The main objective of this study was to determine the impact of using chrome plated copper (CuCr) catalytic converters on engine performance. The vehicle used in the test is a Yamaha Vixion Lightning 150 CC. Engine performance (torque and power) was measured using the Inertia Chassis Dynamometer test instrument with the SAE J1349 standard. The findings of this study indicate that the use of experimental exhaust results in a decrease in vehicle torque and power. This is certainly a compromising factor that must be accepted, considering that installing a catalyst is the same as increasing the exhaust gas flow barrier. The decrease in torque and power is still in the acceptable category, considering that the average decrease only occurs at about 5% for torque and 7% for power. All these arguments show that since the main purpose of using catalytic converters is to lower exhaust emissions, it makes engine performance lower than expected.
EFFECT OF LONGITUDINAL FEEDS ON FLAT GRINDING PROCESSES ON VIBRATION AND SURFACE ROUGHNESS IN OCR12VM MATERIAL Kurnia Dwi Artika; Suhardjono Suhardjono; Yuliana Ningsih
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.18396

Abstract

The grinding process is machining to achieve a high-quality surface finish and high dimensional accuracy. There are two primary processes, the roughing and finishing process. The roughing process generates higher dynamic cutting forces than the finishing process. It leads to a higher vibration that reduces the ground surface quality, tends to lower dimensional accuracy, and shortens the grinding wheel life. On the other hand, the roughing process is applied to reduce machining time, increasing productivity. We conducted this research to study the effect of longitudinal feed on vibration and the surface roughness of hardened tool steel OCR12VM (equivalent to JIS SKD 11), machined by the surface grinding process. The longitudinal feed was varied from 100 mm/s up to 250 mm/s with a 50 mm/s increment. Each variation was machined with a depth of cut of 0.01 mm, 0.02 mm and 0.03 mm, respectively. The constant machining parameter was set: n= 3000 rpm, transversal feeding= 0.04 mm/stroke. The dimension of the grit 80 Aluminium oxide grinding wheel= Ø 200 mm x 25 mm. The result of the research showed that the surface roughness of the ground surface was linearly proportional to the RMS vibration level. The longitudinal feed effects that increased feed resulted from higher surface roughness. The roughness data trend line on the surface has a square function to the longitudinal feed. The similarity, as previously mentioned, is that the vibrations level also increases quadratically with increasing the longitudinal feed. Thus, it is evident that the surface roughness of the ground surface is closely related to the vibration level during the grinding process. Based on this result, it can predict the roughness of the ground surface by measuring the vibration level during the grinding process without measuring the surface roughness.
TEKNOLOGI SEPARATOR PADA BATERAI LI-ION: MATERIAL, TEKNIK FABRIKASI, DAN UJI PERFORMA Nikolas Krisma Hadi Fernandez; Farid Triawan
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.20029

Abstract

The trend of using electric vehicles is increasing. With the increasing use of electric vehicles, it is necessary to master the key technologies used by electric vehicles, one of which is batteries, especially lithium-ion batteries (LiB). There are many important components in the LiB, one of which is a separator that serves to block short circuits between the anode and cathode of the battery while providing a way for ion exchange to continue. This article summarizes important information related to battery separator technology. The information includes the materials that have been used in commercial products and those of under research and development. In addition, the method of fabricating the separator using conventional methods and 3D printing is discussed. Finally, this article also discusses how several studies perform performance tests on separator materials. Keywords: battery separator, fabrication, materials, performance test, lithium-ion battery.

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