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Kamaludin, Muhammad Doni
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Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences

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ULTIMATE TENSILE STRENGTH ANALYSIS OF AN EPOXY COMPOSITE WITH PALM FIBERS AND ARECA CATECHU FIBERS Lubis, Gita Suryani; Tedi, Tedi; Noah, Muhammad Nouki; Noventa, Vinsen; Sajiwo, Tegar; Kamaludin, Muhammad Doni
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.2047

Abstract

There are many types of reinforcement that can be used in the making of composites, and one of the more recent and popular ones is fiber-reinforced polymer. There are many types of fibers that can be used for the composite; this experiment will focus on natural fibers, specifically palm branch fiber and Areca catechu trunk fiber (Known locally in Indonesia as Pinang) with epoxy as its matrix. The composite will be constructed with different parameters, such as different NaOH treatment time (1,2, and 3 hours), pinang: palm fiber composition (50:50, 30:70, and 70:30) and fiber orientation (Horizontal, Vertical, and Random). Through the tensile strength, it's been found that the average strength is 3.07 MPa, where the highest value is 4.04 MPa with the NaOH treatment time of 1 hour, pinang: palm fiber composition of 30:70, and fiber oriented vertically.
ANALISIS PENGARUH VARIASI DIAMETER THROTTLE BODY  DAN ECU TERHADAP PERFORMA PADA YAMAHA WR155R 2021 Kamaludin, Muhammad Doni
Integrative Perspectives of Social and Science Journal Vol. 3 No. 07 Juli (2026): Integrative Perspectives of Social and Science Journal
Publisher : PT Wahana Global Education

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Abstract

Penelitian ini bertujuan menganalisis pengaruh variasi diameter throttle body dan ECU terhadap performa Yamaha WR155R 2021. Variasi throttle body yang digunakan yaitu 28 mm, 32 mm, dan 34 mm dengan ECU standar dan ECU Juken 5+. Pengujian dilakukan menggunakan dynamometerpada putaran 3000–11000 rpm dengan bahan bakar Pertamax Turbo (RON 98). Parameter yang dianalisis meliputi torsi, daya, Air Fuel Ratio(AFR), Mean Effective Pressure (MEP), dan Brake Mean Effective Pressure (BMEP). Hasil penelitian menunjukkan bahwa kombinasi ECU Juken 5+ dan throttle body 28 mm menghasilkan torsi tertinggi sebesar 11,2 Nm pada 7000 rpm, sedangkan daya tertinggi diperoleh pada throttle body32 mm sebesar 9,47039 kW pada 11000 rpm. Nilai AFR pada ECU Juken 5+cenderung kaya (rich) dengan rentang 11,4:1 hingga 12,6:1 sementara ECU standar dengan throttle body 28 mm mendekati kondisi stoikiometri yakni dengan rentang 13,1:1 hingga 14,2:1. Peningkatan torsi dan daya juga menyebabkan nilai MEP dan BMEP meningkat. Hasil penelitian membuktikan bahwa penggunaan ECU Juken 5+ dengan variasi throttle body tertentu mampu meningkatkan performa mesin dibandingkan kondisi standar.    
Co-Authors GITA SURYANI LUBIS Noah, Muhammad Nouki Noventa, Vinsen Sajiwo, Tegar tedi, tedi