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All Journal Jurnal MEKANIKAL Rekayasa Mesin Jurnal Teknik Mesin Indonesia International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Abmas Negeri (JAGRI)
Sri Chandrabakty
Program Sarjana Teknik Mesin, FakultasTeknik, Universitas Tadulako
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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Journal : Jurnal MEKANIKAL

 1 
PENGARUH LINGKUNGAN KOMPOSIT SERAT SABUT KELAPA UNTUK APLIKASI BALING-BALING KINCIR ANGIN Bakri, Bakri; Chandrabakty, Sri; Alfriansyah, Alfriansyah; Tahir, Mohammad
Jurnal MEKANIKAL Vol 5, No 1 (2014)
Publisher : Jurnal MEKANIKAL

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Abstract: Environmetal Effect of Tensile, Modulus and Shear Strength of Coir Fibre Composite. The aim of this research is to know the environmetal effect of tensile, modulus and shear strength of coir fibre composite. In this research, coir is used as reinforcement and matrix uses epoxy resin. Coir is soaked in water with 5% NaOH during 24 hours. Composite is moulded with 17 % fibre volume fraction and 83% matrix volume fraction. Then, the tensile specimen used ASTM D638-02 and shear specimen used ASTM D5379 standard. Universal Testing Machine is used to test of these spesimens. The specimens of tensile and shear include without and with treatment to environmental influence during 10, 20, and 30 days. The result shows that tensile strength, modulus and shear strength  of  specimen treatment during 10, 20, 30 days are not significantly decreased   from  specimen without treatment. This result can be used as recommadation for material of wind blade for the future.   Keywords: composites, coir fiber, shear strength, tensile strength
SIFAT MAMPU BASAH (WETTABILTY) SERAT BATANG MELINJO (GNETUM GNEMON) SEBAGAI PENGUAT KOMPOSIT MATRIKS EPOXY-RESIN Chandrabakty, Sri
Jurnal MEKANIKAL Vol 1, No 1 (2010)
Publisher : Jurnal MEKANIKAL

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This study aims to knowing the influence of surface treatment of fibers t wettability and adhesion ability melinjo bast fiber with epoxy-resin matrix. Wettability  had affected on mechanical properties of fiber reinforced composite. The research process was begun with providing treatment to the melinjo fiber surface, which is boiled with pure water and NaOH 5%  each for 60, 120 and 180 minutes. Contact angle specimen test conducted by dripping droplets of matrix on a single fiber, then the contact angle that occurs is measured using Image Pro Analyzer software (IPWin) through photographs taken by using optical microscope. The results showed that the largest  average of contact angle is  untreated fiber (42.37°) and the lowest is  media treatment of NaOH 5% (33.14°).
PENGARUH PANJANG SERAT TERTANAM TERHADAP KEKUATAN GESER INTERFACIAL KOMPOSIT SERAT BATANG MELINJO-MATRIKS RESIN EPOXY Chandrabakty, Sri
Jurnal MEKANIKAL Vol 2, No 1 (2011)
Publisher : Jurnal MEKANIKAL

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This research is aimed to understand the effect of length-embedded fibres to interfacial shear strength on epoxy resin composite reinforced “melinjo” stem fibres. Pull-out testing was performed with variation of length-embedded fibres including 1 mm, 3mm, and 5mm. Prior to pull-out testing, fibres were treated with boiling with water media and 5% NaOH media. The results showed that fibres with surface treatment using boiling of 5%NaoH have higher interfacial fibre shear strength, but fibres without surface treatment have lower interfacial fibre shear strength. For length - embedded fibre, the highest  interfacial fibre shear strength were obtained on the length-embedded fibre respectively from 1 mm, then 3 mm and 5mm.
EVALUATION OF MECHANICAL PROPERTIES OF COIR-ANGUSTIFOLIA HAW AGAVE FIBER REINFORCED HYBRID EPOXY COMPOSITE Bakri, Bakri; Chandrabakty, Sri; Putra, Kusuma Angga
Jurnal MEKANIKAL Vol 8, No 1 (2017): Jurnal Mekanikal Januari 2017
Publisher : Jurnal MEKANIKAL

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Abstract

This article presents the mechanical properties of coir-angustifolia Hawagave fiber hybrid composite. Prior to form composite, these fibers were soaked in 5%w/v NaOH solution during 24 hours. Coir fibers were twisted and composed one direction like mat and agave fibers were also composed one direction and formed mat. Epoxy resin was used as matrix in this hybrid composite.The hybrid composites were manufactured using hand layup technique followed by compression molding. The variation of fraction volume of coir fiber and agave fiber was 10:20, 15:15 and 20:10 respectively. The tensile strength, tensile modulus, flexural  strength and flexural modulus were evaluated. Fracture tensile was analysed by Scanning Electronic Microscopy (SEM). Result showed that 15%Vf coir and 15% Vf agave fibers on the hybrid composite yield high tensile strength, tensile modulus and flexural modulus compared to other fraction volume. SEM analysis exhibits that all fraction volume variations on the composite tend to undergo fiber fracture without pull-out and matrix damage.Keywords : hybrid composite,  coir fiber, angustifolia Haw agave fiber, matrix, mechanical properties.
Co-Authors Alfriansyah Alfriansyah Anindito Purnowidodo Bakri Bakri Bakri Bakri Khairil Anwar M Rusdi Mohammad Tahir Muhammad Iqbal Muhammad Sadat Hamzah Muhammad Syaiful Fadly Naharuddin Naharuddin Nilasari, Sri Putra, Kusuma Angga Putu Hadi Setyarini Wahyu Richard Nugraha