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All Journal Jurnal Rekayasa Material, Manufaktur & Energi
M.yani M.yani
Fakultas Teknik Universitas Muhammadiyah Sumatera Utara Jalan Kapten Muchtar Basri No. 3 Medan 20238, Indonesia
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Mechanical Properties Komposit Limbah Plastik M.yani M.yani; Bekti Suroso; Rajali Rajali
Rekayasa Material, Manufaktur dan Energi Vol 2, No 1: Maret 2019
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1069.747 KB) | DOI: 10.30596/rmme.v2i1.3071

Abstract

Objek dari penelitian ini adalah rekayasa material yaitu  komposit resin epoxy yang diperkuat serat plastik. Serat plastik diperoleh dari limbah cup minuman jenis polypropelen dari pengepul. Limbah cup plastik dipotong-potong sampai ukuran serat. Pemanfaatan limbah cup plastik untuk dijadikan material baru dan menjadi produk yang berguna di masyarakat masih jarang dilakukan. Material komposit yang diperkuat serat plastik dibuat dengan berdasarkan  massa masing-masing penyusunnya, dimana  rasio antara serat dan resin adalah 0,25%:99,55%; 0,5%;99,5%  dan 0,75%:99,25%. Spesimen uji dibuat dengan cara penuangan ke dalam cetakan menurut ASTM D1621-00 dan selanjutnya dilakukan pengujian kekuatan tekan statik.  Dari hasil pengujian tekan statik dan analisa data dengan cara perhitungan  pada 4 buah spesimen uji,dengan rasio komposisi serat : resin = 0,25% : 99,75%  diperoleh nilai rata-rata tegangan sebesar 44,59 MPa, komposisi serat : resin = 0,5% : 99,5% diperoleh nilai tegangan sebesar 17,04 MP. dan komposisi serat : resin = 0,75% : 99,25% diperoleh nilai tegangan sebesar 12,26 MPa. 
Membandingkan Cetakan Terbuka Dengan Tertutup Pada Pembuatan Papan Skate Board Dari Limbah Sawit M Yani; Bekti Suroso
Rekayasa Material, Manufaktur dan Energi Vol 2, No 2: September 2019
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.622 KB) | DOI: 10.30596/rmme.v2i2.3669

Abstract

This study aims to compare open and closed molds, hand lay-up method in the manufacture of skate board boards from oil palm empty fruit bunches (OPEFB) fiber reinforced composites. The constituent materials of this composite are OPEFB fiber and unsaturated polyester resin. The mixing of both of materials with the ratio of the composition of the OPEFB fiber and polyester resin is made based on a volume fraction of 20:80. The diameter of the OPEFB fiber that is used ranges from 0.1 to 0.8 mm mixed into the unsaturated polyster resin liquid. OPEFB fibers are arranged longitudinally with one layer according to the thickness of the skate board. Skate board prints made using a cover have smooth surfaces on both sides. However, to ensure that the resin has filled the entire surface of the mold from a closed mold seen from the presence of resin that comes out of the closing gap. This resin can not be used anymore because it will dry up and freeze. When compared with printouts without pentup has a rough surface on the top side of the skate board. The conclusion is that the use of closed molds has better results when compared to open molds.
Co-Authors Rajali Rajali Suroso, Bekti