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All Journal Jurnal Teknoin Jurnal Teknik Mesin Indonesia
Kuncoro Diharjo
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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KAJIAN PENGARUH TEKNIK PEMBUATAN LUBANG TERHADAP KEKUATAN TARIK KOMPOSIT HIBRID SERAT GELAS DAN SERAT KARUNG PLASTIK Kuncoro Diharjo
Teknoin Vol. 11 No. 1 (2006)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/.v11i1.96

Abstract

        In panels or components, there are holes for joinning with other part. There are two method for manufacturing a hole, i.e. by boring and molding processes. The objective of this research is to investigate the effect of hole manufacturing method on the tensile properties of hybride composite reinforced  chopped strand mat of E-glass fiber and woven roving fiber of plastic bag.         The materials in this research are plastic bag fiber, chopped strand mat of E-glass fiber (300 gr/m2), unsaturated polyester 157 BQTN-EX, and MEKPO hardener. The composite was made using press mold method, prepared with 4 laminates of glass fiber and 3 laminates of plastic bag fiber. The weight fraction fiber (Wf) of the composite was around 38%. The tensile test specimens were produced according to ASTM D 5766. In the middle of each specimen, there is a hole with 4, 6, or 8 mm in diameter. There are two types hole, i.e. holes were manufactured using boring  and molding process methods.         The result shows that the highest tensile strength of the composites occurs on the composite with 6 mm in diameter of hole manufactured by boring and molding process. It can be recommended that composite has the higher strength for 6 mm in diameter of hole for joining. The composites with 4 and 6 diameters of holes manufactured by molding process have higher tensile strength compared to that manufactured by boring process. In contrast, the tensile strength of the composite with 8 mm in diameter of hole produced by boring is higher than that of the composite with 8 mm in diameter of hole produced by molding process.Keywords : plastic bag fiber, E-glass fiber, molding process, boring.
Pengaruh kandungan serat dan perlakuan alkali terhadap sifat tarik, bending dan impak bahan komposit serat aren-poliester Arga Ahmadi Nugraha; Kuncoro Diharjo; Wijang Wisnu Raharjo
Jurnal Teknik Mesin Indonesia Vol 15 No 2 (2020): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v15i2.165

Abstract

Kajian ini bertujuan untuk menyelidiki efek dari fraksi volume serat dan perlakuan alkali (5% NaOH) serat terhadap sifat mekanis komposit serat aren acak dengan matrik poliester. Bahan utama yang digunakan adalah serat aren (acak), larutan alkali (5% NaOH), Unsaturated Polyester Resin dengan tipe 157 BQTN, dan hardener methyl ethyl keton peroksida (MEKPO). Metode compression molding (cetakan tekan) digunakan untuk membuat komposit dengan fraksi volume serat 0,15, 0,25, 0,35, dan 0,40. Perlakuan alkali dilakukan dengan cara merendam serat aren dalam larutan alkali (5% NaOH) dengan lama waktu perendaman 1, 2, 3, dan 4 jam. Sifat mekanis ditentukan dengan melakukan uji bending, uji tarik dan uji impak. Hasil kajian menunjukkan penambahan fraksi volume meningkatkan kekuatan bending, kekuatan tarik dan ketangguhan impak. Nilai tertinggi dari kekuatan bending, kekuatan tarik dan ketangguhan impak adalah 54,47 MPa, 25,61 MPa, dan 6,60 kJ/m2. Sifat mekanis komposit serat aren-poliester meningkat setelah diberi perlakuan alkali. Nilai tertinggi kekuatan bending, kekuatan tarik dan ketangguhan impak adalah 65,44 MPa, 27,92 MPa, dan 9,46 kJ/m2 setelah diberi perlakuan alkali selama 4 jam.
Co-Authors Arga Ahmadi Nugraha Wijang Wisnu Raharjo