Legiviani, Rani (2016) Pengaruh Perbandingan Komposisi Penyusun Polyurethane Dan Fraksi Massa Serat Kelapa Terhadap Koefisien Absorbsi Suara Dan Kekuatan Lentur Komposit Serat Kelapa Pada Aplikasi Muffler. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Suara keras yang dihasilkan dari engine yang disalurkan
lewat knalpot dapat membuat kebisingan lingkungan. Cara
mengurangi kebisingan tersebut adalah dengan muffler. Muffler
berfungsi mengurangi jumlah suara yang dipancarkan oleh
knalpot dari pembakaran internal mesin. Muffler terdiri dari dua
bagian yaitu tabung berlubang dan sound absorption materials.
sound absorption materials yang biasa digunakan untuk muffler
adalah glasswool namun glasswool tidak baik untuk lingkungan.
Bahan komposit berbahan dasar matriks serat selabut kelapa
merupakan sebuah alternatif material peredam akustik yang
ramah lingkungan karena memanfaatkan material limbah
pertanian. Varibel yang digunakan pada penelitian ini adalah
pengaruh komposisi penyurun polyurethane ( polyol dan
isocyanate) serta fraksi berat serat. Dari hasil SEM didapat
bahwa penambahan serat mengecilkan pori komposit
polyurethane. Hasil uji koefisien absorbsi suara didapat koefisien
absorbsi terbesar dari PU(50PPI:50PPG)-5% Serat sebesar
0.444 pada frekuensi 2000Hz. Hasil Bending menunjukkan
kekuatan bending tertinggi dicapai oleh PU(50PPPI:50PPG)
murni sebesar 14.79 MPa dan hasil densitas menunjukkan
densitas tertinggi dicapai oleh PU (40PPI:60PPG)-7.5% Serat
kelapa
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A loud noise generated from the engine is channeled
through the exhaust can make a noisy environment. To reduce the
noise used muffler. Muffler serves to reduce the amount of noise
emitted by the exhaust of internal combustion engines. Muffler
consists of two parts, the hollow tubes and sound absorption
materials. Glass wool is commonly used as sound absorption
materials, but glass wool is not good for the environment. Matrix
composite material made from coconut fiber selabut is an
alternative acoustic absorbing materials that are environmentally
friendly because it uses agricultural waste material. Variables
used in this study was the effect of the composition polyurethane
composition (polyol and isocyanate) and the weight fraction of
coir fiber. From the result of SEM found that the addition of
polyurethane fiber composite shrink pores. The result of the
absorption coefficient of sound absorption coefficient obtained
the largest of PU (50PPI: 50PPG) -5% fiber by 0.444 at a
frequency of 2000Hz. Bending results showed the highest bending
strength achieved by pure PU (50PPPI: 50PPG) of 14.79 MPa
and density results show the highest density achieved by PU
(40PPI: 60PPG) -7.5% coconut fiber,
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 668.423 9 Leg p |
| Uncontrolled Keywords: | Sound Absorption Material, Automotive, Muffler, Serat kelapa, Polyurethane, komposit |
| Subjects: | T Technology > TN Mining engineering. Metallurgy T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 25 Nov 2019 04:20 |
| Last Modified: | 25 Nov 2019 04:20 |
| URI: | http://repository.its.ac.id/id/eprint/72015 |
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