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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.
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Articles 14 Documents
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Search results for , issue "Vol. 12 No. 2 (2025)" : 14 Documents clear
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

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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.
PENGARUH LAMINAT SERAT RAMI DAN KARBON TERHADAP SIFAT MEKANIK KOMPOSIT HYBRID MATRIKS TUNGGAL EPOXY Sasmito, Cahyo; Adityo Noor Setyo H.D; M. Fendy Kussuma H.S
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

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Abstract

. Composite materials have developed rapidly over the years and now play an important role in the advancement of materials technology. It is believed that the use of mixed (hybrid) composites between natural fibers and artificial (synthetic) fibers can produce better composites. This research aims to determine the effect of the arrangement of hybrid composite laminates reinforced with hemp fiber and carbon fiber using an epoxy resin matrix on mechanical properties, namely tensile strength and impact toughness. The composite was made using the hand lay up method with variations in the laminate composition, namely Carbon-Hemp-Carbon-Hemp and Hemp-Carbon-Carbon-Hemp. The hemp fiber was treated with alkali by soaking in 5% Naoh for 2 hours. The research results show that of the two specimen variations, the Hemp-Carbon-Carbon-Hemp variation has the highest tensile strength value of 245 MPa with the highest strain reaching 0.074 while the highest elastic modulus in the Carbon-Hemp-Carbon-Hemp variation is 6.04 GPa. Charpy impact testing obtained the highest impact value in the Hemp-Carbon-Carbon-Hemp variation of 0.07762 J/mm².
DESAIN PERANCANGAN MESIN PEMOTONG KENTANG MULTIFUNGSI Arif Rohman
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.v12i2.334

Abstract

We often encounter potatoes in traditional and modern markets. Potatoes are very easy to process into various kinds of food, one of which is French fries. For this reason, this research has produced a multifunctional potato cutting machine design that is time efficient, fast in cutting potatoes, and is also a portable machine. The results of this multifunctional potato cutting machine design resulted in the design of machine components such as a potato funnel hopper with dimensions of 300 mm x 80 mm x 222 mm, a potato pusher with dimensions of 80 mm x 114 mm, and the main frame of the machine with dimensions of 421 mm x 300 mm x 380 mm. Then there are 3 variants of cutting knives consisting of flat, long/stick and soft cutting knives. Apart from that, the knife driver used is an electric motor and other drive transmission. Overall, the results of this design produce a design drawing for a potato cutting machine with dimensions of 421 mm x 300 mm x 544 mm.
ANALISIS PENGARUH DESAIN HEATSINK TERHADAP EFISIENSI PANEL SURYA MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMIC (CFD) Ari Irawan
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.v12i2.338

Abstract

The growing demand for energy aligns with the increasing intensity of human activities. Most energy currently relies on non-renewable fossil fuels such as oil, coal, and natural gas, which will eventually deplete if continuously used. Renewable energy serves as a potential alternative to address this issue, one of which is solar energy. Solar energy can be converted into electricity using solar panels, which currently have an efficiency of 14–20% at 25°C. However, every ±1°C temperature increase reduces solar panel efficiency by 0.5%. To mitigate this issue, a cooling system is required to lower the temperature of the solar panels. One such cooling method is passive cooling using heatsinks. This study aims to analyze various heatsink designs that achieve the most significant temperature reduction in solar panels and examine the impact of these designs on solar panel efficiency. The method used in this research is Computational Fluid Dynamics (CFD). The heatsink design variations studied include wave-shaped, square, and triangular designs made from aluminum, copper, and an aluminum-copper alloy. The solar panels used have capacities of 50 WP, 100 WP, and 120 WP. The results show that a 50 WP solar panel equipped with a wave-shaped heatsink made of copper achieves the lowest temperature, 45.85°C, with the smallest efficiency reduction of 13.44%.

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