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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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Perhitungan Teoritis Kinerja Mesin GLP III Sport Dibandingkan dengan Hasil Dynotest Saputra, Alfian Ady; Sabiqunassabiqun
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.731

Abstract

In reciprocating internal combustion engines, the air-fuel mixture significantly influences the thermodynamic changes in the engine and the performance of its components. This study aims to compare the performance of standard and modified engines using Pertalite fuel. The experimental results are also compared with theoretical calculations to evaluate the impact of the modifications on engine performance. The method used in this research is experimental, conducted on both standard and modified Honda GLP III Sport engines. Measurements were performed using a dynotest and unloaded stop tests to obtain data on power, torque, engine speed (rpm), and specific fuel consumption (SFC). The results show that the modified engine exhibits significant increases in power and torque, along with a reduction in SFC compared to the standard engine. At an engine speed of 5000 rpm, the power output of the standard engine is 4.35 kW, while the modified engine reaches 9.11 kW, representing a 109.42% increase. The torque produced by the standard engine is 8.32 N.m, whereas the modified engine achieves 17.4 N.m, indicating an increase of 109.13%. The specific fuel consumption of the standard engine is 482.896 g/kW.h, whereas the modified engine has a specific fuel consumption of 323.38 g/kW.h, showing a decrease of 33.03%. In conclusion, the modifications made to the Honda GLP III Sport engine positively impact its performance, with significantly higher power and torque and improved fuel efficiency. These modifications are proven to enhance engine performance based on both experimental and theoretical results.
Pengujian Konsumsi Energi Baterai pada Sepeda Motor Listrik Konversi Tipe Mid Drive 2 kW Roza, Avifudin; Ismail, Andhi Akhmad; Kristianto, Daniel Janthinus
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.732

Abstract

A convertible electric motorcycle is a motorcycle that has undergone a change from a fuel-driven motor to an electric motor. When testing on a converted electric motorcycle, the battery indicator shows a significant decrease when passing an uphill track. This study aims to calculate battery energy consumption on a converted electric vehicle using a BLDC motor with a 2 kW mid drive type, both without and with the addition of internal gear. The process of testing and collecting data from battery energy consumption on a converted electric motorcycle is carried out by road tests on a flat track and a track that has an extreme climb. The test results on a converted electric motorcycle without the addition of internal gear with a distance of 100 meters on a flat road are 2,016 Wh, elevation 15° of 3,909 Wh, elevation 28° of 4,449 Wh, and elevation 40° of 5,059 Wh. While the test results of the converted electric motorcycle with the addition of internal gear on a horizontal track amounted to 2,421 Wh, elevation 15° of 4,240 Wh, elevation 28° of 5,528 Wh, and elevation 40° of 5,599 Wh.
Pemanfaatan Serbuk Sabut Kelapa Sebagai Bahan Alternatif Pembuatan Kampas Rem Non-Asbestos Pada Sepeda Motor Alfarisy, Abdul Aris Alfarisy; Burhanudin, Aan; Ma'mun, Hisyam
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.735

Abstract

This study is an experimental study in the manufacture of composite materials with coconut fiber powder reinforcement from coconut waste and aluminum powder from industrial waste. From this study, the characteristics of composite materials will be obtained with variations in the composition of coconut fiber powder and aluminum powder as reinforcement with a polyester resin matrix. This study is considered necessary to find composite materials that are not only superior in mechanical properties, but also optimal and utilize waste materials in large quantities that require proper management so as not to cause problems. The manufacture of this composite material uses coconut fiber powder, aluminum powder and polyester resin with a volume ratio of 30% coconut fiber powder, 30% aluminum powder, 40% resin, 40% coconut fiber powder, 20% aluminum powder, 40% resin, 45% coconut fiber powder, 15% aluminum powder, 40% resin, 50% coconut fiber powder, 10% aluminum powder, 40% resin, 60% coconut fiber powder, 0% aluminum powder, 40% resin. The process of making this composite material uses a press method with a vertical force pressure of 2,500 kg with sintering at a temperature of 150oC for 30 minutes. The characterization carried out includes the hardness and wear of each material composition. The hardness value closest to the hardness value of the comparative brake pads is the KL45AL15 specimen with an average hardness value of 33.1 kg/mm² with a composition of 45% coconut fiber powder, 15% aluminum powder, and 40% resin. And in the results of the brake pad wear test, the wear value closest to the wear value of the comparative brake pads is the KL60AL0 specimen with a wear value of 0.00252. with a composition of 60% coconut fiber powder, 0% aluminum powder, and 40% resin.
Efek Carburizing Terhadap Sifat Mekanik Limbah Drum Oli sebagai Bahan Baku di Industri Kecil Pande Besi Hadi Darmo, Adityo Noor Setyo; Listyanda, Faiz; Hayati, Nur
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.748

Abstract

Oil drum waste, cheap but not yet optimally utilized. This waste has the potential to be a substitute for carbon steel base material for making metal crafts through heat treatment. This research aims to determine the effectiveness of the influence of beef bone and barium carbonate as an energizer on the sharpness of coconut shell charcoal carbon diffusion into used oil drum waste after the pack carburizing process. The used drum test specimen with a content of 0.0379% C, was placed in a carburizer environment of coconut shell charcoal powder mixed with 20%, 25%, and 30% beef bone meal energizer and 20% barium carbonate (BaCO3) heated at a temperature of 800 0C, 850 0C and 900 0C with a holding time of 30 minutes immediately quenched. The effectiveness of carbon diffusion and macro structure were evaluated using a "Desktop Metals Analyzer" and an optical microscope, while the hardness was "Micro Vickers Hardness Tester" at a load of 200 gf with a pressing time of 5 seconds. The test results show, for a mixture of 1kg of carburizer, energizer 30%, 25%, 200%, and barium carbonate 20%, the carbon element has increased to 0.442%C, 0.335%C, and 0.322%C from the original 0.0379%C, while the hardness becomes 1043.73 VHN0.20, 964.03 VHN0.20, and 885.55 VHN0.050, from the initial hardness of 150.68 VHN0.050 in a matrix of martensite and bainite with other phases ferrite and pearlite.
Proses Produksi Soft Magnetic Composite (SMC) Berbahan Dasar Fe Waloyo, Hery Tri; Firmansyah, Muhammad Gilang; Setiyawan, Khanif; Mujianto, Agus
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.765

Abstract

This study discuss in various production methods of iron-based Soft Magnetic Composite (SMC) and to identify the most effective production. The increase in carbon emissions and the need for alternative energy drive the development of electromagnetic technology, including the use of SMC in electric motors. The method used in this study is a literature review, by reviewing relevant articles from national and international journals. The results of the study indicate that traditional production methods and Additive Manufacturing (AM) are the two main methods used in SMC production. Among these methods, the traditional production method with Powder Metallurgy (PM) technology proved to be more effective in producing SMC with better quality and more efficient production processes. This research provides in-depth insights into various SMC production techniques and can serve as a foundation for future research in the development of electromagnetic materials.
Analisis Radiography dan Macro Structure Baja Karbon EH36 dengan Grade A Terhadap Hasil Pengelasan FCAW Variasi Ampere widodo, risriki; Purwanto; Siswadi
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.787

Abstract

Ship superstructure or commonly called superstructure in welding fabrication found problems arising from the welding process. Problems caused by welding such as defects on the surface of the weld and defects in the weld. Defects inside the weld require radiography and macro structure testing to see indications that arise such as porosity, slag inclusion and incomplete fusion. The purpose of this research is to determine the results of Flux Cored Arc Welding (FCAW) between Grade EH36 carbon steel material and Grade A with V Groove connection type and for backing material using ceramic strip without gouging. The research process that has been carried out includes welding the two materials with the Flux Cored Arc Welding (FCAW) method using parameters 160 A, 200 A and 250 A. Non Destructive Test (NDT) testing used is Radiography Test while Destructive Test (DT) testing is Macro Structure Test, both of which aim to find indications of defects in the weld. The conclusions found after the Radiography and Macro Structure tests were found no indication of defects in the weld metal at parameter variations of 160 Ampere, 200 Ampere and 250 Ampere.
Analisis Aspek Ergonomi pada Prototipe Alat Peraga Pendidikan Batang Truss untuk Mata Kuliah Kekuatan Material Nia N. Permata; Royandi, Muhamad Aditya; Yessa F. Giantoyo; Asep Indra Komara; Muhammad Abdurrahman; Fadhlin Rizki
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.788

Abstract

Educational aids are very helpful in improving students' understanding of abstract subjects such as exact sciences. The Strength of Materials (SOM) course in the Manufacturing Design Engineering Department is supported by practical activities in the SOM studio using teaching aids, including truss bar tests. However, the currently used teaching aids have been complained about by students due to their complexity. Therefore, the development of a more user-friendly truss teaching aid prototype is needed. This article focuses on the evaluation of the impact of the developed teaching aid on its suitability for use in easier operations. The method used is observation techniques and interviews with students who have tried the previous teaching aids and the prototype being developed. The results showed that the prototype developed was better than the previous tool, because the procedure for using the tool was simpler and the duration of disassembling and assembling the test specimens was faster. Thus, it can be stated that the developed truss test teaching aid prototype is easier for students to use than the previous tool used in the SOM studio. Therefore, the development process and performance tracking of the developed prototype can be carried out at the next development stage.
Rancang Bangun Sistem Transmisi Belt dan Pulley Pada Mesin Crusher Plastik High Density Polyethylene (HDPE) Pramudi, Ganjar; Wibowo, Alif Sebrio
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.795

Abstract

High-Density Polyethylene (HDPE) plastic is one of the most widely used types of plastic, commonly found in products such as bottles, containers, and pipes. However, if not managed properly, HDPE plastic waste poses a significant environmental challenge. An HDPE plastic crusher machine is a tool designed to shred HDPE plastic waste into fine powder, facilitating recycling and its use in composite materials. The objective of this research is to design and construct an efficient and effective HDPE plastic crusher machine. The HDPE plastic crusher machine features a rotary knife and a robust steel frame. The rotary blade is crafted from a hard, sharp material, while the steel frame provides support for the machine's body and drive motor. The machine is powered by a 3 HP electric motor operating at a speed of 1400 RPM. Power transmission is achieved through a belt and pulley system. The machine functions by transferring power from the main 3 HP electric motor to the shaft of the crusher knife. Direct testing of the HDPE plastic crusher machine was conducted using shredded HDPE plastic. The testing process was divided into two types: one without HDPE plastic and one with HDPE plastic. The results indicated that the machine produced 100 grams of fine powder in 30 minutes. The belt and pulley transmission system demonstrated a maximum tension of 216.5 N and a working tension of 176.4 N.
Pengaruh Kandungan Serbuk Sekam Padi, Serbuk Kulit Kacang Tanah, dan Serat Ijuk Terhadap Kekuatan Impak dan Mikrostruktur Komposit Matriks Resin Nurgiansyah, Rama; Muhamad Fitri
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.808

Abstract

This study is driven by the utilization of organic materials of rice husk powder, peanut shell powder, and palm fiber for the needs of environmentally friendly composite materials. This research seeks to ascertain the largest percentage within the impact test resistance of each material and the characteristics of the composite microstructure. This research was conducted using the experimental test method at Mercu Buana University’s Mechanical Engineering Laboratory, where the examination is carried there was an utilizing the Charpy to test the impact method, while the microstructure characteristics were carried out using optical microscopy (OM). The experiment was employed in this investigation by dividing into 9 composition variations on the impact test specimen by manual molding using a specimen mold and drying it under sunlight for 1-2 hours, after which an impact test was conducted in order to assess the durability of the specimen and analyze the microstructure of the specimen. Based on the studies that have been conducted, the specimen with the highest toughness is combination B which has a toughness value of 20 kJ/m2
A Pengaruh Kuat Tekan dan Daya Serap Air Laut Pada Material Komposit Sandwich Serat Sabut Kelapa Jayadin; Muhammad Mujiburohman; Handik Hendratama; Tri Widayatno; Nur Arifah Hidayati; Hamzarudin Hikmatiar
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): 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.v20i1.809

Abstract

The need for boards as a material for furniture is increasing, therefore alternative materials are needed to replace wooden boards, such as sandwich composite boards. Coconut is a tropical plant that has long been known by Indonesian people. Coconut is one of the plants that can be used as a composite board, namely coconut fiber. This research aims to make composite boards from coconut fiber to determine the compressive strength and absorption capacity of sea water. The materials for this research are coconut fiber and polyester resin. Coconut fiber is a waste that is rarely used so the waste can become serious waste. This research uses the Compressing Molding method at room temperature where the mold is loaded. In this research, compression testing uses ASTM D 659 standards and seawater absorption testing uses ASTM D 570 standards. The results of this research show optimal conditions at a volume fraction of 20% with a core thickness of 6 mm, namely 8,230 MPa in compression testing and 25% thickness. The 8 mm core in the Sea Water Absorption Capacity test had the lowest absorption capacity at 0.16%.

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