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Jurnal Elemen
Published by Politeknik Negeri Tanah Laut
ISSN : 24424471     EISSN : 25812661     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering
Jurnal Elemen is a media for publishing scientific articles in the field of mechanical and automotive engineering which are published regularly in June and December each year. All articles presented are the results of research, conceptual ideas and reviews in the field of mechanical and automotive engineering that have never been published before. Jurnal Elemen managed by P3M in the Tanah Laut State Polytechnic has been ISSN, namely the printed version of ISSN 2442-4471 and online version of ISSN 2581-2661, and for now the Elementary journal has been indexed in ISJD (Indonesian Scientific Journal Database) in PDII-LIPI . then it can be indexed and accredited at SINTA, DOAJ and Scopus.
Arjuna Subject : -
Articles 267 Documents
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ANALISIS PENGELASAN KOMBINASI GMAW DAN FCAW PADA BAJA ASTM A36 TERHADAP SIFAT MEKANI Manta, Faisal; Wiguna, Ahmad Zulfikar Patria; Pratama, Kafinra; Haliq, Ridwan
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.278

Abstract

A36 steel as raw material for heavy equipment attachments, such as blades and buckets. Gas Metal Arc Welding (GMAW) and Flux-Cored Arc Welding (FCAW) are used for the connection. High heat input and weld metal protection mechanisms are suitable for joining thick plates, however, in the field, malfunctions were found due to damage to the weld joint. To overcome this problem, research was carried out on two welding techniques to obtain optimal joint strength values. The research uses GMAW, FCAW and combination welding to join A36 steel with a V-beam angle of 60°. On the welding results, Magnetic Particle Inspection (MPI) and bending tests will be carried out. MPI testing states combination welding meets the requirements of the AWS1015 standard. The highest bending strength in FCAW welding was 160,419 MPa and the lowest in GMAW was 71,724 MPa, while combination welding was 113,312 MPa. The difference in value is influenced by the phases formed from each welding method visible in the microphotographs in the weld metal, HAZ and base metal areas.
PENGARUH VARIASI DESAIN SUDU TERHADAP KARAKTERISTIK HIDRODINAMIKA TURBIN AKSIAL VORTEX ULTRA LOW HEAD MENGGUNAKAN METODE CFD Khanif, Masnurojak Bin; Rahman Saleh, Arif; Fajarningrum, Nurmala Dyah; Sulistiyo, Raka Mahendra
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.279

Abstract

Renewable energy is being developed by many advanced countries due to its positive impacts. Indonesia has a high potential for hydropower generation using axial vortex turbines, which are effective at low head heights. Researchers use experimental methods, employing CFD simulations with specific boundary conditions. In one blade variation, testing was conducted 18 times with speed variables (20, 40, 60, 80, 100, 120 RPM) and blade angles of 22.5°, 35°, 40°. Torque data was collected after achieving convergence. The results showed the highest torque at 22.5° blade angle and 80 RPM speed, amounting to 2.4 N.m, and efficiency of 57.90% at 120 RPM. Researchers concluded that the decrease in torque is caused by the increase in vortex flow, reducing interaction between the blade and fluid after 80 RPM, while the increase in torque before 80 RPM is due to minimal swirling in the basin.
RANCANG BANGUN TURBIN ANGIN SAVONIUS MENGGUNAKAN VARIASI SILINDER PENGGANGGU Syahyuniar, Rusuminto; Putra, Muhammad Rezky Fitri; Musthofa, Imron; Artika, Kurnia Dwi; Iranto, Roma
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.280

Abstract

Turbin angin Savonius sebagai alternatif sumber energi terbarukan. Turbin angin Savonius dirancang dengan prinsip kerja yang sederhana, efektif dalam menghasilkan energi listrik pada kecepatan angin rendah, dan mudah dalam perawatan. Tujuan dari penelitian ini adalah untuk merancang dan membuat turbin angin Savonius dengan memiliki efisiensi yang tinggi. Metode yang digunakan adalah metode ekperimental, pengumpulan data, perancangan turbin, pembuatan prototipe, dan pengujian. Pengujian dilakukan dengan mengukur putaran turbin dan menghitung rpm yang dihasilkan pada berbagai kecepatan angin dengan silinder pengganggu dan tanpa silinder pengganggu. Hasil penelitian menunjukkan bahwa desain turbin angin Savonius menggunakan material alumunium 6061 dengan jumlah 2 blade, tinggi blade 500 mm, diameter 722 mm. Pada kecepatan angin rendah 3 – 5 m/s blade dapat berputar untuk menggerakkan generator dan menghasilkan energi listrik, menggunakan power inverter dapat menghasilkan listrik 220 volt. Pengujian tanpa hambatan menghasilkan posisi ideal adalah jarak 0,5 meter dengan kecepatan angin sebesar 4,5 m/s menghasilkan 91 putaran permenit dan 93,7 rpm. Pengujian pengaruh variasi silinder pengganggu menghasilkan jarak ideal posisi silinder pengganggu adalah 20 cm, pengaruh silinder 4 dengan ukuran diameter 85 mm menghasilkan 73 putaran permenit, 91,2 rpm dan pengujian dengan beban generator menghasilkan kecepatan angin ideal dengan kecepatan angin 4,5 m/s dan jarak 0,5 meter menghasilkan 64 putaran permenit, 86,5 rpm dan 9,1 volt .Simulasi blade displance atau perubahan bentuk pada saat terkena angin menghasilkan nilai maksimal 0,07548 mm dan simulasi blade mises stress atau beban titik tumpu dengan nilai maksimal 3,561 MPa. Dari simulasi fluid dengan kecepatan angin 4 m/s dengan streamline 3,8 s/d 5,8 m/s.
RANCANG BANGUN SISTEM IDENTIFIKASI KELELAHAN BERDASARKAN DRIVING BEHAVIOUR Firdaus, Sukma; Artika, Kurnia Dwi
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.184

Abstract

Driver fatigue is a major crash factor, yet camera/physiology methods face cost, privacy, and calibration barriers. This paper presents an embedded, noninvasive system using four OBD-II PIDs—speed (0x0D), RPM (0x0C), throttle (0x11), and engine load (0x04)—polled in real time via ELM327 on Jetson Orin. Engineering values (Phys_) and raw ECU payloads (RAW_) are logged for DoCAN/ISO-TP auditing. The real-world dataset contains 51.80 h (5 drivers, 10 sessions, 2 contexts) at 2 Hz, labeled by KSS and mapped to a continuous fatigue score. Decoding fidelity is high (r≥0.9996, MAE<0.25). From 60 s/10 s windows we extract instability features (SD, 0.05–0.3 Hz corrective-oscillation bandpower). Wilcoxon exact tests show significant shifts at high fatigue (p≤0.001953). Cluster-robust regression improves R² 0.266→0.716; LODO reduces RMSE 0.198→0.122 and raises prediction correlation 0.525→0.823. Findings match reduced vigilance and sensorimotor control stability under fatigue. This supports 4-PID OBD-II as a low-cost edge fatigue-warning modality.
PENGARUH VARIASI WAKTU PELAPISAN MANGANESE PHOSPHATE PADA BAJA KARBON ST42 TERHADAP KETAHANAN KOROSI DAN KETAHANAN AUS Nanda, Zega
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pelapisan manganese phosphate merupakan salah satu jenis teknologi rekayasa dalam coating. Sifat utama yang menunjukkan kualitas dari hasil pelapisan manganese phosphate berupa daya tahan terhadap korosi dan ketahanan aus. Tujuan penelitian ini yaitu menganalisis pengaruh waktu pencelupan terhadap ketebalan, laju korosi, dan ketahanan aus pada baja ST42. Jenis pengujian antara lain pengujian Scanning Electron Microscope (SEM), pengujian laju korosi potensiodinamik, dan pengujian keausan universal wear. Penelitian ini menggunakan metode eksperimental pencelupan spesimen kedalam larutan pelapis manganese phosphate dengan menggunakan variasi waktu pencelupan 15 menit, 20 menit, 25 menit. Nilai ketebalan dalam uji SEM variasi 15 menit sebesar 26,89 µm, 20 menit sebesar 50,54 µm, dan 25 menit sebesar 25,56 µm. Variasi 15 menit mendapatkan nilai laju korosi 0,01278 mmpy, 20 menit mendapatkan nilai 0,004437 mmpy, dan 25 menit mendapatkan nilai 0,016429 mmpy. Nilai laju keausan spesifik pada pengujian universal wear variasi 15 menit sebesar 0,000435 mm3/kg.m, 20 menit sebesar 0,000288 mm3/kg.m, dan 25 menit sebesar 0,000633 mm3/kg.m. Hasil dari penelitian menunjukkan bahwa uji SEM, nilai laju korosi, dan pengujian keausan paling baik terdapat dalam pelapisan menggunakan variasi 20 menit. Parameter lama pencelupan pada proses pelapisan manganese phosphate tidak meningkatkan ketebalan, laju korosi, dan nilai keausan spesifik.
PENGARUH PENGELASAN LOGAM BERBEDA PLAT SS 400 DENGAN PLAT SUS 304 TERHADAP SIFAT MEKANIS Hamdan Faozi; Sri Hastuti
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

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Abstract

Metal welding technology used today can connect two different types of metals. The welding is still often found with welding defects, the problems that are often faced are differences in melting points, expansion coefficients, physical, and mechanical properties. The purpose of the research was to determine the effect of strong current variation between low carbon steel SS 400 and SUS 304 stainless steel on mechanical properties. This research method uses experimental, GTAW welding strong variations of currents 60 A, 80 A, and 100 A. The results of this study concluded that the strength of the current affects the tensile strength, and violence. The highest tensile strength is 346.63 MPa with a strain of 9.52 % and the modulus of elasticity is 36.59 MPa at a current strength of 100 A. This is due to the strong difference in currents resulting in different inputs and heat distributions in each specimen. The hardness test results show that specimens with strong current variations of 100 A have the highest hardness level of both the weld region, HAZ, and parent metal, rather than with strong current specimens of 60 A and 80 A, this is because the greater the welding ampere will increase the strength of the hardness.
PERANCANGAN PURWARUPA RANGKA, BONCENGAN, DAN TEMPAT BATERAI SEPEDA LIPAT LISTRIK UNTUK PRODUKSI MENGGUNAKAN PENGECORAN PASIR Romadhon, Hafif; Taufik, Ikhwan
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

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Abstract

Electric folding bikes are a modern transportation solution that offers practicality and efficiency of storage space. Production alternatives are needed to reduce dependence on pipes and welding processes. One alternative production process is to use the metal casting method. This study aims to design and analyze the strength the design of the frame, pillion, and battery holder of the electric folding bicycle for the metal casting process. The material used is A356 aluminum. The design and simulation process is carried out using CAD and CAE software. The loading simulation was conducted under real load conditions with a load of 99,5 kg. Based on the results of simulation and analysis, the design of the frame, bonnet, and battery compartment of the best electric folding bicycle has a von Mises stress value of 61,21 MPa, displacement of 1,712 mm, mass of 4,6 kg, and safety factor of 4,5.
STUDI KOMPARATIF PERFORMA MOTOR HONDA WIN 100 DENGAN PENGGUNAAN GROUND STRAP KABEL KOIL DAN VARIASI BUSI BERBEDA Irvan Ainur
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.324

Abstract

A method to improve engine performance on the ignition coil is the addition of a ground strap to the coil cable and the selection of the right type of spark plug. The ground strap functions to stabilize the electric current from the coil and allows for a larger and more stable spark plug. The study aims to determine the effect of using a coil cable ground strap and spark plug variations on the performance of the Honda Win 100. The spark plugs used are standard, iridum and platinum spark plugs. Testing was carried out using a Dyno test tool and a Honda Win 100 motorcycle. The first step is to test all types of spark plugs with standard coil cables, then all types of spark plugs are tested with ground strap coil cables. The test results show that iridium spark plugs with standard coil cables have the highest torque value compared to other variations and iridium spark plugs with ground strap coil cables have the highest power value compared to other variations. From the test results, the use of ground straps does not have much effect on changes in motorcycle power and torque.  
PEMANFAATAN KULIT DURIAN UNTUK MENGHASILKAN BAHAN BAKAR ALTERNATIF MELALUI PROSES FAST PYROLISIS Arsyad, Muhammad Zanu Nur Arsyad; Dewi, Rany Puspita; Hayati, Nur
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.325

Abstract

Durian skin waste has not been utilized properly so in the end it just piles up in the trash, so a study is needed to reduce the amount of durian skin waste that is not utilized properly. Pyrolysis is a heating process without oxygen. This study aimed to determine the amount of bio-oil, viscosity value, density value, and calorific value of the durian skin waste tested. Temperatures of 350 ℃, 400 ℃, and 450 ℃ are variations in this study. The study's results using the fast pyrolysis process were 120 ml, 130 ml, and 150 ml. The resulting viscosity values ​​are 5.4 mm²/s, 5.2 mm²/s, and 4.6 mm²/s, the resulting density values ​​are 725.5 kg/m³, 727.7 kg/m³, and 743.3 kg/m³. The resulting calorific values ​​are 14.6 MJ/kg, 17.1 MJ/kg, and 18.5 MJ/kg.
PERANCANGAN TURBIN PELTON SEBAGAI PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO DI SUNGAI JLAMPRANG DESA GENITO, WINDUSARI Yanuar, Yanuar Nugraha Husni Maulana
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

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Abstract

This study discusses the design of a Pelton turbine for a Micro Hydro Power Plant (PLTMH) in the Jlamprang River, Genito Village, Windusari. The goal is to utilize the potential of river flow with a large head and water discharge as a source of renewable energy. The methods include power potential analysis, turbine design using CAD, and dynamic fluid simulation with ANSYS to evaluate performance. Design optimization is carried out by considering various jet velocities, namely 45 m/s, 50 m/s, and 55 m/s. The optimal jet speed of 55 m/s produces 53 kW of power, 86% efficiency, 1124 Nm of torque, and 8.2 Pa of pressure, although turbulence increases. The design involves adjusting the nozzle diameter, number, and dimensions of the blades to maximize performance. The results show optimal fluid distribution, making this PLTMH a sustainable energy solution for rural areas. This technology is expected to increase the energy independence of Genito Village and reduce dependence on conventional electricity.

Page 26 of 27 | Total Record : 267

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