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All Journal Civil Engineering and Technology Journal Equivalent: Jurnal Ilmiah Sosial Teknik
Andi Ibrahim Soumi
Universitas Sarjanawiyata Tamansiswa
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences Transportation

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STUDI NUMERIK PENGARUH LEBAR SPESIMEN TERHADAP SIFAT TARIK AISI 1010 MENGACU PADA ASTM E8 Iskandar Yasin; Andi Ibrahim Soumi
CivETech: Civil Engineering and Technology Journal Vol. 7 No. 2 (2025): CivETech
Publisher : Fakultas Teknik Universitas Cokroaminoto Yogyakarta

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Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi lebar spesimen terhadap sifat mekanik tarik baja karbon rendah AISI 1010 melalui pendekatan simulasi numerik berbasis metode elemen hingga (Finite Element Analysis/FEA) menggunakan perangkat lunak Ansys Workbench. Spesimen uji tarik dimodelkan dalam bentuk dog-bone sesuai standar ASTM E8 dengan dua variasi lebar daerah ukur, yaitu 6 mm (sub-size specimen) dan 12.5 mm (standard specimen). Parameter material dimasukkan berdasarkan data sifat mekanik AISI 1010, sedangkan pembebanan diberikan dalam bentuk kendali perpindahan aksial pada ujung penjepit. Hasil simulasi menunjukkan bahwa spesimen dengan lebar 12.5 mm memiliki tegangan maksimum dan deformasi plastis yang lebih tinggi serta distribusi regangan yang lebih homogen dibandingkan spesimen 6 mm. Sebaliknya, spesimen berlebar 6 mm cenderung mengalami konsentrasi regangan pada daerah transisi fillet–gage sehingga kekuatan tarik yang diperoleh lebih rendah. Temuan ini menegaskan bahwa pemilihan lebar spesimen sesuai standar ASTM E8 berperan penting dalam memperoleh hasil uji tarik yang representatif dan akurat. Penelitian ini memberikan kontribusi dalam memperkuat pemahaman mengenai pengaruh geometri spesimen terhadap karakterisasi sifat mekanik material serta menjadi rujukan bagi penelitian dan pengujian lanjutan yang menggunakan pendekatan simulasi numerik.
Mechanical Performance and Structural Evaluation of Bamboo-Based Hybrid Composites Modified with Carbon Filler and Graphene Oxide Iskandar Yasin; Nurul Hasan; Widarto Sutrisno; Andi Ibrahim Soumi
Equivalent: Jurnal Ilmiah Sosial Teknik Vol. 8 No. 3 (2026): Equivalent: Jurnal Ilmiah Sosial Teknik
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jequi.v8i3.289

Abstract

Background: Bamboo-based composites have attracted attention as sustainable alternatives to conventional structural materials in civil engineering. However, their broader application is often limited by relatively low mechanical performance, weak interfacial bonding between fiber and matrix, and vulnerability to structural failure under loading conditions. Objective: This study aims to evaluate the mechanical performance and structural behavior of bamboo-based hybrid composites modified with carbon filler and graphene oxide (GO) to enhance strength, improve interfacial bonding, and reduce the risk of structural failure. Methods: An experimental and numerical approach was employed. Three composite configurations were fabricated and tested (n = 3 specimens per configuration): unfilled bamboo–epoxy (control), carbon-reinforced, and GO-modified composite. Mechanical properties were evaluated through tensile (ASTM D3039) and Charpy impact tests. Finite element analysis (FEA) using ANSYS Workbench validated experimental findings by comparing stress distribution, strain behavior, and total deformation under a 1000 kN axial tensile load, showing strong agreement (R² up to 0.779). Results: The results show that both carbon filler and GO significantly improve the mechanical properties of bamboo composites. The GO-modified composite exhibited the highest tensile strength and elastic modulus, along with enhanced crack resistance due to improved fiber–matrix adhesion and inhibition of crack propagation. FEA simulations support the experimental findings, demonstrating that GO-modified composites display more uniform stress distribution, lower strain concentration, and reduced deformation compared with the other configurations. Conclusion: GO-reinforced bamboo hybrid composites demonstrate superior mechanical performance and structural stability, indicating strong potential for mitigating structural failure risks.
Co-Authors Iskandar Yasin Nurul Hasan Widarto Sutrisno