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
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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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