Pengaruh Variasi Fraksi Volume Polyesterserat Sisal Dan Struktur Serat Terhadap Karakteristik Bending Komposit

Anindya, Dewi Nastiti (2016) Pengaruh Variasi Fraksi Volume Polyesterserat Sisal Dan Struktur Serat Terhadap Karakteristik Bending Komposit. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Sumber energy yang semakin menipis menuntut manusia untuk berinovasi pada segala bidang, terutama pada bidang transportasi yang membutuhkan sumber energy sangat besar. Pada bidang otomotif terutama sudah banyak dikembangkan komposit sebagai pengganti matrial metal yang tergolong berat dan menghabiskan banyak sumber energy. Komposit yang banyak digunkan sekarang ini adalah komposit dengan penguat sintesis, sedangkan seperti yang diketahui bahwa penguat sintesis masih berbahaya untuk lingkungan dan terutama bagi kesehatan manusia. Maka penguat yang berasal dari alam sedang dikembangkan, misalnya seperti serat alam. Banyak penguat yang ditemukan dari daun nanas, daun sisal, serabut kelapa, dan lain-lainnya, namun untuk kekuatan serat alam masih setengah dibawah serat sintesis. Aplikasi dari komposit serat alam ini seperti body dan bumper mobil yang ringan dan juga ramah lingkungan. Penelitian dilakukan dengan mencampurkan polyester dan serat sisal. Dimensi spesimen uji bending dibuat sesuai standart pengujian bending ASTM D 790M- 84a dengan variasi fraksi volume serat sisal 40%, 50%, dan 60% dan dengan variasi struktur serat anyaman, continue, chopped. Kemudian di-curing pada temperatur kamar (± 27°C) selama 24 jam. Selanjutnya setelah didapatkan kekuatan paling optimum lalu memvariasikan ukuran panjang serat sisal. Dari proses pengujian ini didapatkan hasil kekuatan bending tertinggi pada fraksi volume 60% dengan struktur serat continue, nilai tegangannya 165,08 MPa dan modulus elastisitasnya 31,17 GPa. Dan kekuatan bending terendah pada fraksi volume 40% dengan struktur serat chopped, nilai tegangannya 33,03 MPa namun modulus elastisitasnya 10,99 GPa, pada fraksi volume 50% dengan struktur serat anyaman ========================================================================================== Energy resources decrement, demands people to innovate in all kind of field of studies, especially in transportation that needs a high amount of energy resources. In automotive industry, composites have been developed as an alternative material that are heavy and consumes high amount of energy. Composites used in the present times are composites with synthetic reinforces. However, synthetic reinforces are known as dangerous materials for the environment and moreover to human’s health. Therefore, natural reinforces are being developed, like natural fiber for example. Many of them are made up from pineapple leaves, sisal leaves, coconut fibers, and others, but their strength are still half below the synthetic reinforces. Application of natural fiber composites are for example in manufacturing of light and environmental friendly car bodies and bumpers. This experiment is conducted by mixing polyester and sisal fibers. Test specimen dimentions are made according to the bending test standard D 790M-84a with the variation of volume fractions of the sisal fibers, 40%, 50%, and 60%, and also by varying the fibers’ braid, continue and chopped. After that, it is cured at room temperature, (± 27°C) for 24 hours. When the optimum strength is required, the length of the sisal fibers, are then varied. The result of this experiment are the highest bending strength is 165,08 MPa and 31,17 GPa modulus of elasticity, which are acquired by 60% of volume fraction with the continue fibres’ structure. While the lowest bending strength is 33,03 MPa, which is acquired by 40% of volume fraction with the chopped structure fibers. But the lowest modulus of elasticity is 10,99 GPa, which is acquired by the 50% volume fraction with the braid structure fibers

Item Type: Thesis (Undergraduate)
Additional Information: RSM 620.118 Ani p
Uncontrolled Keywords: polyester, fraksi volume, komposit, serat sisal, struktur serat
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials.
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: EKO BUDI RAHARJO
Date Deposited: 08 Jun 2020 05:21
Last Modified: 08 Jun 2020 05:23
URI: http://repository.its.ac.id/id/eprint/76114

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