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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Perancangan awal wind tunnel untuk pengujian turbin angin Alexander Matthew; Levin Halim
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.350

Abstract

As the supply of natural resources related to petroleum is dwindling, the step that can be taken is to switch to renewable energy sources that can minimize existing problems. Renewable energy sources themselves have several types, namely solar, water, and wind power. Which will be discussed further on the type of wind that is considered quite potential if developed in Indonesia. To be able to produce electrical energy from the wind, a Wind Turbine is also needed which is used as a supporting tool. The development of the Wind Turbine is still very necessary because the Wind Turbine itself needs to be adjusted to the conditions of placement and the conditions of the place that wants to use the Wind Turbine. In addition, to test the Wind Turbine itself is quite difficult because it depends on the uncertain natural conditions and the position of the placement of the Wind Turbine itself. For this reason, the Wind Tunnel can be used to support the research and development of the Wind Turbine. Wind Tunnel itself has several types that are tailored to the desired needs and needs. In this discussion, the Wind Tunnel discussed is a Subsonic type which has a Mach Number < 1. By using the Wind Tunnel itself, it is hoped that the research and analysis process of the Wind Turbine can be helped and it can be easier to find what things need to be developed. As a support for Wind Tunnel design, Solidworks software is also used which can be used to support the desired Wind Tunnel design process, because it can also be used to simulate.
Studi awal material komposit berpenguat serat bambu dengan matriks resin epoksi/hardener sebagai material antipeluru Harmiansyah; Burmawi; Risky Arman; Rustam Efendi
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.351

Abstract

Bulletproof material is used as a bulletproof vest material that functions to protect the human body from the threat of physical attack, especially attacks from firearms. Bulletproof material serves to reduce the kinetic energy of the projectile so it does not hit the bulletproof vest user. The main material in the manufacture of bulletproof material is steel with a high density so that the weight of the bulletproof material is high which causes the user to be unable to move freely. Composite is a material consisting of two or more elements that have good mechanical properties and low density so that it can be used as an alternative to steel for bulletproof materials. The bulletproof material used was reinforced with bamboo fiber with a matrix of epoxy resin/hardener mixture and the addition of 20, 25, and 30 ml ceramic granules, the composite material was tested for ballistics using a variation of the firing range parameter 2; 2.5; and 3 m. Based on the results of ballistic tests, all variations of the addition of ceramic granules were able to reduce the energy of the projectile with a penetration depth of < 1 mm where the kinetic energy of the projectile was 209.83 joule. Based on the macro photo analysis of projectile traces on the bulletproof material, the cracks that occur in the bulletproof material are ductile cracks due to the spread of the cracks to other areas on the surface of the bulletproof material.
Design and performance test of overshot water wheel with variation of inner diameter Alif Ramadhan; Asral
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.376

Abstract

This research was conducted to find out how to design an overshot type waterwheel and the effect of variations inner diameter of the overshot type waterwheel on work performance, the waterwheel is classified into the category of picohydro power plants that can generate electricity less than 5000 Watt, the overshot type waterwheel has a motion mechanism using a push water that comes from the top of the waterwheel, the overshot type waterwheel has greater efficiency than other types of waterwheels, therefore to get a large amount of power an overshot type waterwheel is used. The testing of the designed waterwheel has been adapted to conditions in the Riau Province area, where the Riau area has many rivers and reservoirs so it is suitable for use for hydroelectric power plants, and the height of the water fall in the Riau area on average is about 1 meter to 3 meters. The size of the inner diameter of the waterwheel was tested starting from the size of 0.25 m, 0.5 m, 0.75 m, this size variation was made to test whether the effect of the inner diameter of the waterwheel affects the amount of torque produced by the waterwheel by using the same discharge so that it can produce power optimally, a waterwheel with an inner diameter of 0.5 m has the best performance because the efficiency of the waterwheel is the highest, from this test it can be seen that the dimensions of the waterwheel must be directly proportional to the discharge given to the waterwheel so that the power generated more optimal.
Analisis kegagalan sprocket pada transmisi mobil Antawirya Muhammad Farras Farshal; Sri Nugroho; Yusuf Umardani
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.377

Abstract

Sprocket is one part of the transmission system commonly used in motor vehicles. In transmission system of the eco car Antawirya team from Diponegoro University also uses sprocket as one of its components. When starting first attempt of the race and do full throttle, the sprocket become failure since deformation happens on sprocket. The sprocket run into plastic deformation and then caused chain exiting its path and come off. The purpose of this study is to find the cause of fatigue that occurs by hardness test, chemical composition test and stress analysis. Sprocket use aluminum alloy 7075-T6 as a material. As a result of chemical composition testing, aluminum content is 97.3% which is more than the standard maximum limit of 91.4%. The percentage of zinc is 0.06% while the minimum limit of standard is 5.1%. There are also differences from other chemical elements such as magnesium and copper. The addition of that other elements serves to increase the strength of the material because Al 7075-T6 is well known as material with high strength. The results of stress analysis using ANSYS software found that the loading that occurred produce a Von-Mises stress of 392 MPa and yield strength of the material is 503 MPa, from that figure makes 1.28 a safety factor value and there should be no deformation on the sprocket. As a result of the hardness test, it is known that the value of hardness in the area close to deformation is 76.16 HV while the standard is 175 HV.
Studi komparasi pengaruh penggunaan variasi konsentrasi inhibitor amine oxide terhadap laju korosi pipa baja API 5L grade B di lingkungan fluida drain line Dian Ahmad Sudali; Priyo Tri Iswanto
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.378

Abstract

API 5L Grade B Steel Pipes is one of the most used in pipeline system for oil and gas industry because it has the appropriate strength and characteristics. Nevertheless, API 5L Grade B Steel Pipes potential for corrosion due to working in a corrosive environment. One of the efforts that can be done to prevent corrosion in this piping system is the use of inhibitors. The purpose of this study was to study the effect of using variations in the concentration of amine oxide inhibitors on the corrosion rate of API 5L Grade B steel pipe in the drain line fluid environment. The inhibitors used in this study were organic inhibitors, namely amine oxide with a concentration variation of 0.5% and 0.9%. Corrosion measurement using Potentiodynamic Polarization method. Tests for composition, microstructure, Vickers hardness, and tensile tests were carried out to support the test data. The results showed that the corrosion rate of API 5L Grade steel pipe in a drain line fluid environment without inhibitors was 68.94 mpy. The addition of amine oxide inhibitor was effective in reducing the corrosion rate and the optimum concentration was obtained at a concentration of 0.9% with a corrosion rate of 8.16 mpy.
Perancangan alat pemotong kayu dengan dua mata pisau menggunakan dinamo sebagai mesin penggerak yang multifungsi M Miko Mizar; Asnawi Lubis; Tumpal Ojahan Rajagukguk
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.379

Abstract

Technology continues to develop all the time along with the progress of the times, in addition to facilitating human work, the use of machines is very helpful in increasing productivity in a relatively faster time, including wood processing craftsmen in Indonesia. To make it easier for wood craftsmen, a modern saw machine is needed so that it is hoped that the demand from the community can be met. This study aims to design a wood cutting tool and find out how long it takes to cut wood with a thickness of 0.75 cm, 1.75 cm, 2.75 cm and 3.75 cm, and a cutting width of 3 cm. The design of this multifunctional tool uses cutting blades and an AC 220 V – 180 watt dynamo as a driving machine. The result of the design is shaped like a table with two blades that can be used interchangeably, and there is sandpaper on the front that functions as a smoothing part of the cut wood. This tool has a height of 90 cm, a width of 50 cm, a length of 70 cm, and the height of the top blade holder is 15 cm, and the top blade holder is 60 cm long, the sandpaper holder is on the front side. This tool is able to cut the type of wood medang aged approximately 15 years in the form of blocks with a thickness of 0.75 cm in 2.51 seconds, 1.75 cm 3.72 seconds, 2.75 cm in 6.27 seconds, and 3. 75 cm with 8.70 seconds average time.
Pengaruh fraksi massa dan ukuran butir basalt terhadap sifat mekanik komposit hibrid serat rotan Bely Agusti; Tumpal Ojahan Rajagukguk; Slamet Sumardi; Yusup Hendronursito
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.380

Abstract

Composite is a material that continues to be developed because of its advantages as an engineering material. With its diverse geographical environment, Indonesia has resources that can use as a composite material, and Lampung Province is no exception, which has basalt and rattan fiber resources. This research is needed to determine the effect of using basalt powder as a filler and rattan fiber as a polyester resin matrix composite reinforcement. Basalt was reduced to size variations of 100, 200, and 325 mesh with 2%, 7%, and 12% mass fractions. Rattan is made into fiber and washed with 5% NaOH, then dried. Rattan fibers were arranged randomly with a fixed mass fraction of rattan at 10% with a fiber size of 2 mm in diameter and 5 cm in length. SHCP 2668 polyester resin matrix with 2% catalyst. The composite was made using the hand lay-up method by pressing 3 tons for 15 minutes and drying the composite. Mechanical testing includes tensile strength test based on ASTM D638 standard and three-point bending test based on ASTM D790, macro test observations to determine the shape of the fracture after mechanical testing. ANOVA analysis showed the significant effect of mass fraction and size of basalt powder on tensile strength with a P-value <5%. The basalt particle size contributed 84% dominantly, while the mass fraction was 15.6% to the tensile sterngth. The grain size of the basalt contributes 62.13% to the flexural strength with a significant effect of P-value <10%. In flexural strength, rattan fiber has more influence than tensile stress. The small grain size of the basalt provides a denser bonding density between the particles than the larger particles. Resin can fill small cavities formed by small particles to make the composite board thicker and more robust.
Pengaruh parameter pemesinan dan komposisi campuran polyester - vinylester terhadap keutuhan permukaan silindris Adam Malik
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.381

Abstract

The surface integrity of the cylindrical machining is an absolute requirement for ready-to-assemble components. This deficiency causes the components to fail to be assembled. This is due to the contribution of various factors involved in producing a cylindrical surface. Especially on the cylindrical surface of components made of composite materials. This study reports the effect of lathe & drill parameters, polyester-vinylester blend composition on roundness, roughness, and changes in surface hardness, as well as the main contribution of these factors. This study aims to examine the influence and contribution of polyester-vinylester blend composition, feedrate, speed and depth of cut on roundness, roughness, and changes in surface hardness of lathe & drill products. To achieve this goal, a series of cylindrical surface machining experiments were carried out on workpieces of the polyester-vinylester blend of different compositions. In the experimental set, the Taguchi L9(4)3-OAs method was used. The experimental results show that the most influential on the roundness and surface roughness is the size of the composition of the polyester-vinylester blend followed by the size of the feedrate carried out. Cutting speed and depth of cut don't really matter. While the change in hardness that is very influential is the feed followed by the depth of cut, the composition of the mixture actually shows the opposite between lathe and drilling. The novelty obtained from this experiment is to obtain the desired surface integrity of the components made of composites by mixing composite matrix materials.
Analisis potensi energi panas matahari untuk digunakan pada sistem refrigerasi absorpsi di bangunan perkantoran Yusvardi Yusuf; Imron Rosyadi; Mekro Permana Pinem
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.382

Abstract

Conventional cooling systems used in office buildings are one of the causes of ozone layer depletion and greenhouse effects. It requires the advancement of new technologies that are safe for the environment to be used in cooling systems in office buildings. Absorption cooling systems using solar thermal energy have many advantages by using non-destructive working fluids such as water, or in the form of saline solutions. This is a form of energy saving and safe for the environment. In order to obtain real and objective measurement data, testing is performed in two stages, namely the test equipment testing stage and the second stage is data collection when the test equipment is fully operational. The test equipment can be used in stand-alone systems or conventional air conditioners. In the test, it is known that the average percentage of solar thermal energy consumption per day is 40% of total energy so due to solar thermal energy consumption, the average COP value of this system per day is 2 and this value is greater than similar absorption cooling systems. conventional, then by knowing the value of solar energy consumption, can be seen the value of CO2 emissions reduction of 143.8 kg CO2 per day.
Pembuatan masker aerator untuk atlet difabel sebagai pencegahan hypoxia saat latihan di masa pandemi COVID-19 Faiz Nur Fauzi; Diasdamara Fakhri Nugroho; Rizqi Husain Alfathan; Wijang Wisnu Raharjo; Bambang Kusharjanta; Ubaidillah
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.383

Abstract

During the current COVID-19 pandemic, we are encouraged to always obey health protocols. One of them is to use a mask. The use of masks on athletes, especially athletes with disabilities has a bad impact on the athlete's body itself. Because in the course of training, the athletes will do heavy work that requires adequate oxygen supply. In this case, the mask can reduce the athlete's respiratory effectiveness due to hypoxia. Hypoxia is a condition in which the body lacks oxygen levels. To prevent hypoxia in athletes who must continue to carry out training with the COVID-19 health protocol is to use a mask that can regulate air circulation properly. Therefore, an idea emerged to make an aerator mask that can help the respiratory system and can prevent athletes from getting hypoxia during training during a pandemic, because the aerator mask that we made is equipped with dual fans that can supply oxygen properly. Thus, athletes can exercise without fear of experiencing hypoxia disorders and remain compliant with health protocols.

Page 18 of 30 | Total Record : 291

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