Potensi serat sabut kelapa perlu diteliti untuk dibuat komposit. Tujuan penelitian ini adalah mengetahui pengaruh fraksi volume serat sabut kelapa terhadap sifat tarik, sifat bending dan ketangguhan impak komposit dengan matrik polyester, katalis MEKPO, dan NaOH. Serat sabut kelapa yang digunakan ber diameter 0.2 mm. Komposit dibuat dengan metode cetak tekan pada fraksi volume 20-35%. Pengujian sesuai standar ASTM D638 (uji tarik), ASTM D790 (uji bending) dan ASTM D5941 (uji impak) dengan metode impak izot. Pengamatan foto makro untuk menganalisis kegagalan. Kekuatan tarik dan regangan tarik semakin meningkat dengan peningkatan fraksi volume. Modulus elastisitas tertinggi pada Vf 31,4% sebesar 0,206 GPa dan menjadi 0,11 GPa pada Vf 34,88% dengan kekuatan tarik 17,48 MPa, regangan 16.64%. Kekuatan bending meningkat dengan penambahan fraksi volume. Peningkatan kekuatan bending tertinggi (tanpa perlakuan alkali) pada fraksi volume 33,7% sebesar 34.17 MPa dan modulus bending sebesar 2.10 GPa. Peningkatan fraksi volume serat sabut kelapa dapat meningkatkan ketangguhan impak, dengan nilai tertinggi sebesar 26,42 kJ/m2 pada fraksi volume 35,84%. Penampang patah pada pengujian tarik didominasi patahan tunggal sedangkan pada pengujian bending dan impak terjadi patahan banyak serta terjadi fiber pull-out
The main problem of Padamulya Village is the lack of a technology utilization system in the field of fisheries. Fish farming systems still use conventional, so that monitoring of fish quality is limited in time and place. The main purpose of this service is to provide knowledge to the community related to smart agriculture technology in the fisheries sector in Padamulya Village to increase quality fish production. The training activity was held on December 10, 2019 in the Hall of the Muhammadiyah University of Tasikmalaya. The results of this service show that the community is starting to have knowledge and provide land to make ponds with smart agriculture technology.
The main problem in the manufacturing process in vocational schools is the limited number of manufacturing machines for the practical process because the equipment is very expensive. Therefore, the main objective of this activity is to provide training on manufacturing processes both theoretically and experimentally to vocational high school students in Tasikmalaya City. The results of this activity indicate that vocational high school students gain experience and knowledge in operating manufacturing machinery from start to finish.
The purpose of this research for analyze composite material reinforced tesk wood powder and brass powder and epoxy resin matriks as brake pads material. The mix of composite brake pads divided into three kinds are Spesimen A, Spesimen B, Spesimen C, with different material composition next made to be mixing process, compacting, and sintering. This testing done with way test violence through Brinell method, test of wear rate use tool of Ogoshi high speed universal wear testing machine produce data of highest violence composite owned by Spsesimen A with score 10 HBN and highest wear rate owned by Spesimen C with score 0.0004 Kg/mm2. Composite material teak wood powder and brass powder and epoxy resin matriks have character of mechanics if composite have score of big violence so wear rate will more low and otherwise if composite have score of little violence so the wear rate will more high.
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