Putra, Wildan Haryanto Muhammad (2021) Pengaruh Densitas Material Terhadap Koefisien Gesek, Kekerasan Permukaan, Dan Keausan Pada Material Komposit Serbuk Serabut Kelapa. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Menurut data yang didapatkan dari badan pusat statistik (BPS), jumlah kendaraan sepeda motor di Indonesia setiap tahunnya mengalami peningkatan. Menurut BPS pula angka kecelakaan lalu lintas pada tahun 2015 ke tahun 2016 mengalami peningkatan. Pada tahun 2015 angka kecelakaan lalu lintas sebanyak 98 ribu kasus dan pada tahun 2016 angka kecelakaan lalu lintas sebanyak 106 ribu kasus. Salah satu penyebab banyaknya kecelakaan yang terjadi salah satunya adalah rem blong. Rem blong sendiri menyumbang 31% dari total kasus kecelakaan yang terjadi.
Penelitian ini bertujuan untuk mengetahui pengaruh densitas material terhadap kekerasan permukaan, koefisien gesek, dan keausan dari material komposit resin epoxy, serbuk serabut kelapa, dan silika (SiO2) yang nantinya diharapkan dapat digunakan sebagai referensi pembuatan kampas rem. Variasi densitas material didapatkan dari pemberian tekanan pada saat pencetakan. Pengujian dilakukan dengan menggunakan durometer shore tipe D untuk pengujian kekerasan permukaan, PASCO untuk pengujian koefisien gesek, dan tribometer pin-on-disk untuk pengujian keausan. Variasi densitas spesimen uji dilakukan dengan pemberian tekanan dengan nilai 15, 30, 45 psi dan tanpa diberikan tekanan.
Setelah dilakukan pengujian dan analisa data diketahui penambahan tekanan saat pencetakan material komposit dengan nilai tertentu dapat mempengaruhi densitas dan sifat material komposit serbuk serabut kelapa. Dari analisa data diperoleh nilai densitas terbesar yaitu 1,0987 g/cm3 pada variasi tekanan sebesar 45 psi dan densitas terkecil yaitu 0,9495 g/cm3 pada variasi tanpa diberikan tekanan. Dari pengujian diperoleh data koefisien gesek kinetis terbesar didapat pada material komposit serbuk serabut kelapa dengan nilai 0,325 pada material komposit dengan densitas 0,9495 g/cm3 dan koefisien gesek kinetis terkecil didapat pada material komposit serbuk serabut kelapa dengan nilai 0,258 pada material komposit dengan densitas 1,0987 g/cm3. Untuk nilai Specific Wear Rate terendah pada rasio densitas-kekerasan permukaan 0,0133 dengan nilai 0,00019953 mm3/Nm dan nilai Specific Wear Rate tertinggi pada rasio densitas-kekerasan permukaan 0,0124 dengan nilai 0,00074624 mm3/Nm.
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According to data obtained from the Central Statistics
Agency (BPS), the number of motorbikes in Indonesia has
increased every year. In 2015, the number of motorcycles in
Indonesia was 98 million motorcycles. In 2016, the number of
motorcycle vehicles in Indonesia was 105 million motorbikes.
According to BPS, the number of traffic accidents from 2015 to
2016 has increased. In 2015 the number of traffic accidents was 98
thousand cases and in 2016 the number of traffic accidents was 106
thousand cases. One of the reasons for the many accidents that
occur is a failed brake. Failed brakes alone accounted for 31% of
the total accident cases.
This study aims to determine the effect of material density
on surface hardness, friction coefficient, and wear rate of
composite epoxy resin, coconut fiber powder, and silica (SiO2)
which is expected to be used to be used as a reference for making
brake pads. The variation in material density is obtained from
applying pressure at the time of casting. Tests were carried out
using shore type D durometer for surface hardness testing, PASCO
for friction coefficient testing, and pin-on-disk tribometer for wear
testing. Density variations of the test specimens were carried out
by applying pressure with a value of 15, 30, 45 psi and without
applying pressure.
iv
After testing and analyzing the data, added pressure
during the molding of the composite material with a certain value
could affect the density and properties of the composite material.
From the data analysis, it was obtained that the largest density
value was 1,0987 g/cm3
at the pressure 45 psi and the smallest
density was 0,9495 g/cm3
in the variation without being
pressurized. From the test, the highest kinetical friction coefficient
data was obtained on composite material with a value of 0,325 in
composite material with density of 0,9495 g/cm3
and the smallest
kinetic friction coefficient was obtained on composite material with
a value of 0,258 on a composite material with density of 1,0987
g/cm3
. For the Specific Wear Rate, the lowest value is at a densitysurface hardness ratio of 0,0133 with a value of 0,00019953
mm3
/Nm and the highest Specific Wear Rate value at a densitysurface hardness ratio of 0,0124 with a value of 0,00074624
mm3
/Nm.
Item Type: | Thesis (Undergraduate) |
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Uncontrolled Keywords: | kekerasan, keausan, koefisien gesek, densitas, resin epoxy, silika (SiO2), serabut kelapa |
Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ561 Surface |
Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
Depositing User: | Wildan Haryanto Muhammad Putra |
Date Deposited: | 13 Mar 2021 01:54 |
Last Modified: | 13 Mar 2021 01:54 |
URI: | http://repository.its.ac.id/id/eprint/84175 |
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