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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi JTTM: Jurnal Terapan Teknik Mesin
Islam, Muhammad Irfa Nurul
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Variasi Fraksi Massa Komposit Hibrid Serat Goni/E-Glass Terhadap Kekuatan Tarik Dan Kekuatan Bending Maulana, Indra; Firmansyah, Hendrix Noviyanto; Permata, Shafira Nur; Islam, Muhammad Irfa Nurul
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.12662

Abstract

Material komposit menjadi pilihan utama dalam berbagai sektor industri karena keunggulannya yang ringan, tahan korosi, dan memiliki kekuatan mekanik tinggi dibanding logam konvensional. Salah satu pengembangan komposit adalah pemanfaatan serat alami dan serat sintetis dalam pembuatan komposit hibrid. Penelitian ini bertujuan untuk mengetahui pengaruh variasi fraksi massa komposit hibrid serat goni/e-glass terhadap kekuatan tarik dan kekuatan bending. Spesimen dibuat menggunakan metode hand lay up dengan variasi fraksi massa serat goni/e-glass yaitu A (19%:11%), B (12%:18%), C (15%:15%), dan D (23%:7%). Uji tarik dan bending dilakukan masing-masing sesuai standar ASTM D638 dan D790. Hasil pengujian tarik menunjukkan bahwa spesimen B memiliki nilai tegangan tarik dan modulus elastisitas tertinggi sebesar 117,199 MPa dan 3881,312 MPa, namun memiliki regangan tarik yang lebih rendah yang menandakan sifat material tersebut lebih getas. Sementara itu, hasil uji bending menunjukkan bahwa spesimen A menghasilkan tegangan bending dan modulus elastisitas bending tertinggi sebesar 41,106 MPa dan 689,987 MPa. Analisis makro mengungkapkan adanya kegagalan delaminasi, fiber breaking, void, dan deformasi pada patahan spesimen. Semua spesimen telah memenuhi standar minimal kekuatan tarik untuk bahan outer helm SNI. Secara keseluruhan, komposisi fraksi massa serat dan penempatan susunan serat berpengaruh signifikan terhadap sifat mekanik komposit hibrid ini.
Effect of mass fraction on tensile and bending strength of ramie/jute/e-glass composites Nur Permata, Shafira; Firmansyah, Hendrix Noviyanto; Islam, Muhammad Irfa Nurul; Maulana, Indra
JTTM : Jurnal Terapan Teknik Mesin Vol 6 No 2 (2025): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v6i2.1735

Abstract

Motorcyclist safety is highly influenced by the effectiveness of head protection, making material innovation in helmet manufacturing a primary focus particularly through the use of composite materials. This study aims to evaluate the mechanical properties of hybrid composites made from ramie, jute, and E-glass fibers, formulated with varying fiber mass fractions and epoxy resin as the matrix. The specimens were fabricated using the hand lay-up method and tested according to ASTM D638 for tensile strength and ASTM D790 for bending strength. The results showed that specimen D, which contained the highest mass fraction of E-glass fiber, demonstrated the best performance in tensile testing with an elastic modulus of 3062.244 MPa, tensile strength of 91.714 MPa, and the lowest strain at 2.14%, indicating high stiffness but brittle behavior. In contrast, specimen C, with the highest jute fiber content, had the lowest tensile modulus and strength, but the highest strain, indicating greater flexibility. In bending tests, specimen D showed the highest modulus of elasticity at 586.016 MPa, while specimen C recorded the highest flexural strength at 34.921 MPa. Macro observations revealed defects such as delamination, fiber breakage, and voids. The study concludes that fiber mass fraction significantly affects the mechanical properties of hybrid composites, and placing E-glass fibers in the outer laminate layers enhances flexural strength. This research contributes to the development of SNI-compliant helmets that are lightweight, strong, and environmentally friendly.
Co-Authors Hendrix Noviyanto Firmansyah, Hendrix Noviyanto Indra Maulana, Indra Nur Permata, Shafira Permata, Shafira Nur