ANALISIS PENGARUH SUHU DAN MATERIAL LINER DAN COMPOSITE TERHADAP KEKUATAN STRUKTUR DINDING HYDROGEN TANK TYPE III DENGAN FINITE ELEMENT METHOD

*Ilhan Raznand Allabib  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Mohammad Tauviqirrahman  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Sulistyo Sulistyo  -  Department of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia

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Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi suhu dan kombinasi material terhadap kekuatan struktur dinding tangki hidrogen Tipe III dengan menggunakan metode elemen hingga (Finite Element Method). Material yang digunakan pada bagian liner adalah baja AISI 4130, sedangkan untuk bagian komposit digunakan E-Glass/Epoxy. Simulasi dilakukan pada tekanan internal sebesar 70 MPa dengan tiga kondisi suhu operasi, yaitu -20°C, 20°C, dan 70°C. Hasil analisis menunjukkan bahwa deformasi struktural meningkat seiring dengan kenaikan suhu, yang disebabkan oleh penurunan kekakuan material akibat pelunakan termal. Meskipun demikian, nilai deformasi masih berada dalam batas aman. Di sisi lain, tegangan maksimum pada lapisan liner menunjukkan tren penurunan seiring naiknya suhu, mengindikasikan terjadinya relaksasi tegangan pada material logam. Penurunan ini bersifat moderat, sehingga struktur tetap menunjukkan stabilitas yang baik terhadap fluktuasi suhu. Secara keseluruhan, kombinasi material AISI 4130 dan E-Glass/Epoxy terbukti cukup andal dalam mempertahankan kekuatan struktural tangki hidrogen Tipe III di bawah kondisi termal yang bervariasi.

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Keywords: aisi 4130; e-glass/epoxy; finite element method; suhu operasi; tangki hidrogen tipe iii
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