Pengaruh Panjang Serat Terhadap Nilai Koefisien Absorpsi Suara Dan Struktur Morfologi Komposit Berpenguat Serat Rami Dan Bambu Betung Dengan Matriks Gypsum Untuk Aplikasi Otomotif

Shabrina, Nabilla (2016) Pengaruh Panjang Serat Terhadap Nilai Koefisien Absorpsi Suara Dan Struktur Morfologi Komposit Berpenguat Serat Rami Dan Bambu Betung Dengan Matriks Gypsum Untuk Aplikasi Otomotif. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

[img]
Preview
Text
2711100015-Undergraduate-Theses.pdf

Download (2MB) | Preview

Abstract

Penelitian ini dilakukan untuk membuat material komposit gypsum berpenguat serat alam yaitu serat bambu betung dan rami untuk bahan penyerap suara. Permasalahan yang dikaji adalah untuk mengetahui hubungan panjang serat pada komposit bermatrik gypsum terhadap nilai koefisien absorpsi suara (α), serta morfologi dari material. Panjang serat yang digunakan adalah 20mm dan 60mm dengan fraksi volum 30% serat : 70% gypsum. Terdapat 4 macam variasi spesimen yaitu (20mmR/20mmB-G), (20mmR/60mmB-G), (60mmR/20mmB-G), dan (60mmR/60mmB-G) Tujuannya untuk mendapatkan hubungan nilai koefisien absorpsi suara, serta morfologi material dengan panjang serat yang diberikan serta aplikasinya dalam material penyerap suara yang memenuhi standar ISO 11654. Selain itu material juga diuji TGA(Thermogravimetric Analysis) untuk mengetahui kerentanan terjadinya degradasi terhadap kenaikan temperatur. Metode pembuatan komposit yang digunakan adalah hand lay up. Metode pengujian berdasarkan standart ASTM E1050, ASTM E2809 dan ASTM E1131. Hasil pengujian menunjukkan bahwa spesimen (60mmR/60mmB-G) memiliki nilai α yang tertinggi pada frekuensi 4000Hz. Menurut hasil pengamatan dengan Scanning Electron Microscope, spesimen (60mmR/60mmB-G) memiliki struktur yang lebih berpori dibandingkan ketiga spesimen lainnya yang menjelaskan nilai α terbesar yang ada di spesimen ini.Uji Thermogravimetric Analysis menjelaskan batas temperatur yang diperbolehkan untuk aplikasi material R/B-G sebelum mengalami degradasi yaitu 300oC. ======================================================================================== This research was done to make gypsum composite fiber reinforced material to be a sound absorbing material. The problems studied was to understand the connection between the length of ramie and betung bamboo fiber with gypsum matrix composite on the sound absorption coefficient value (α), and the morphological structure. The fiber length was varied in 20mm and 60mm with the volume fraction of 30% fibers: 70% gypsum. 4 varieties of specimens were observed in this research, (20mmR/20mmB-G), (20mmR/60mmB-G), (60mmR/20mmB-G), and (60mmR/60mmB-G0). The aim was to get a good relation between sound absorption coefficient value and morphological structure with given fibers length and its application as sound absorbing material according to ISO 11654 standard. Specimens were also tested by Thermogravimetric Analysis to get the range of safe temperature for the application of this material before the degradation. Method used to fabricate the composites was hand layup. Methods of testing were in accordance to ASTM E1050, ASTM E2809 and ASTM E1131 standards. The result shows that the (60mmR/60mmB-G) specimen owned the highest α value at the frequency of 4000 Hz. From Scanning Electron Microscope, the correlations between α value and morphological structure of the composites were revealed. (60mmR/60mmB-G) specimen show the most porous structure among the others 3 specimens as a proved of the highest α value. From Thermogravimetric Analysis, the working temperature of R/B-G composites before the degradation was also revealed. This composites should not working above the temperature of 300oC

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.118 Sha p
Uncontrolled Keywords: gipsum, koefisien absorpsi, morfologi material, serat rami, serat bambu betung, absorption coefficient, betung bamboo fiber, gypsum, morphological structure, ramie fiber
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: Mrs Anis Wulandari
Date Deposited: 14 Jul 2017 05:35
Last Modified: 27 Dec 2018 07:44
URI: http://repository.its.ac.id/id/eprint/42166

Actions (login required)

View Item View Item