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All Journal Rotasi Quantum Teknika Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Dhewanto, Santo Ajie
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Quantum Teknika

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Karakterisasi Bahan Kampas Rem Sepeda Motor Dari Komposit Serbuk Kayu Jati Yudhanto, Ferriawan; Dhewanto, Santo Ajie; Yakti, Suluh Widya
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 1, No 1 (2019): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.010104

Abstract

Commonly the prime material for brake pad of the commercial motorcycle using asbestos, these materials cause a disease like as cancer of respiration if the abrasive particles were sniffed. The SKJ (Serbuk Kayu Jati) brake pad is alternative to replacement the asbestos brake pads. The mechanical test includes a wear test, hardeness test, friction coefficient test, and heat resistant test. The hot press process for SKJ as main material of brake pad based by variation of temperature there are 160ºC, 170ºC, and 180ºC. The optimum test result of SKJ brake pads is a variation of 180ºC with wear test result is 3,36 x 10-7 mm2/kg, the hardeness result is 25,1 BHN, the friction coefficient test is 0,59 and not damaged on the heat resistant test with a temperature of 300ºC during an hour.
Pengaruh Bentuk Geometri Papan Komposit Serbuk Kayu Terhadap Serapan Bising Ruang Yudhanto, Ferriawan; Rachmawati, Putri; Yusuf, Mirza; Dhewanto, Santo Ajie
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 7 No. 2 (2026): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v7i2.31141

Abstract

This study aims to analyze the effect of variations in surface geometry on the acoustic performance of composite boards made from jackfruit sawdust waste. The material was combined with urea-formaldehyde adhesive and catalyst, then processed using a hot-press method at 160°C and 60 tons. The specimens were formed into four geometric variations, namely funnels, cones, tubes, and pillars, using a CNC machine. Tests were conducted using the impedance tube method over the frequency range of 200-1600 Hz to determine the sound absorption coefficient (α) and reflection coefficient (RC). The results show that the α value increases with increasing frequency. At low frequencies (200-400 Hz), the absorption capacity remains low but increases significantly at medium to high frequencies. The pillar geometry showed the best performance with a maximum α value of around 0.42 and the lowest reflection value. It indicates that modification of the surface geometry plays an important role in improving wave interaction and the effectiveness of sound absorption.
Co-Authors Faisal Arif Nurgesang Ferriawan Yudhanto, Ferriawan Kasim, Muhammad Alfaarisi Maulana Muhammad Khafidh Paryanto, P Putri Rachmawati, Putri Ridlwan, Muhammad Yakti, Suluh Widya Yustiasih Purwaningrum Yusuf, Mirza