Analisis Pengaruh Penambahan Lapisan Ketiga Pada Struktur Crashbox Tubular Hibrida Pla Auxetic Re Entrant-Aluminium Terhadap Kinerja Crashworthiness

Abidien, Aly Zain Al (2026) Analisis Pengaruh Penambahan Lapisan Ketiga Pada Struktur Crashbox Tubular Hibrida Pla Auxetic Re Entrant-Aluminium Terhadap Kinerja Crashworthiness. Other thesis, Insitut Teknologi Sepuluh Nopember.

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Abstract

Pengembangan crashbox hibrida yang ringan dan efektif sangat penting untuk keselamatan penumpang. Struktur hibrida tubular yang menggabungkan Polylactic Acid (PLA) auxetic dengan aluminium menawarkan solusi berbiaya rendah. Namun, penelitian sebelumnya pada konfigurasi dua lapis menunjukkan kelemahan, meskipun menguat di beberapa parameter crashworthiness (IPF & MCF tinggi), deformasinya tidak stabil (nilai CFE rendah) dan tidak efisien secara bobot (nilai SEA stagnan). Penelitian ini bertujuan untuk mengoptimasi desain tersebut dengan menganalisis kinerja crashworthiness struktur berkonfigurasi sandwich tiga lapis. Penelitian ini menggunakan metode uji tekan quasi-static untuk mengevaluasi empat jenis spesimen yaitu baseline Aluminium, baseline PLA Auxetic Re-entrant (RE), dan dua konfigurasi sandwich tiga lapis (dual auxetic dan dual re-entrant). Kinerja dievaluasi berdasarkan parameter Initial Peak Force (IPF), Mean Crushing Force (MCF), Energy Absorption (EA), Specific Energy Absorption (SEA), dan Crush Force Efficiency (CFE). Hasil menunjukkan bahwa penambahan lapisan ketiga memperbaiki kelemahan yang ditemukan pada desain 2 lapis yaitu dengan kenaikan SEA sebesar 25-63% dan CFE sebesar 23-50%. Konfigurasi 3 lapis dual aluminium menunjukkan karakteristik paling ideal, dengan performa SEA dan CFE yang lebih tinggi dibandingkan dengan dual auxetic serta IPF yang lebih rendah. Analisis menunjukkan bahwa struktur sandwich 3-lapis menghadirkan efek double confinement yang lebih baik dibandingkan performa confinement pada struktur 2 lapis. Penelitian ini menyimpulkan bahwa penambahan lapisan ketiga pada crashbox memberikan struktur yang lebih layak sebagai komponen penyerap energi pada kendaraan.
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The development of lightweight and effective hybrid crash boxes is crucial for passenger safety. A hybrid tubular structure combining auxetic Polylactic Acid (PLA) with aluminum offers a low-cost solution. However, previous research on two-layer configurations revealed weaknesses: although they showed improvements in some crashworthiness parameters (high IPF & MCF), their deformation was unstable (low CFE values) and they were not weight-efficient (stagnant SEA values). This study aims to optimize the design by analyzing the crashworthiness performance of a three-layer sandwich-configured structure. This study used a quasi-static compression test method to evaluate four types of specimens: baseline aluminum, baseline PLA auxetic re-entrant (RE), and two three-layer sandwich configurations (dual auxetic and dual re-entrant). Performance was evaluated based on the following parameters: Initial Peak Force (IPF), Mean Crushing Force (MCF), Energy Absorption (EA), Specific Energy Absorption (SEA), and Crush Force Efficiency (CFE). The results show that adding a third layer addresses the weaknesses found in the two-layer design, as evidenced by increases in SEA and CFE. The three-layer dual-aluminum configuration (auxetic core with aluminum layers) exhibits the most ideal characteristics, with significant improvements in SEA compared to the two-layer baseline data, as well as a lower IPF than other three-layer specimens (dual-auxetic). Analysis indicates that the three-layer sandwich structure provides double confinement, forcing the structure to deform more stably. This study concludes that adding a third layer to the two-layer crash box results in a structure that is more suitable as an energy-absorbing component in vehicles.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Auxetic, crashbox, crashworthiness, hybrid tube
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Industrial Technology > Mechanical Engineering
Depositing User:	Aly Zain Al Abidien
Date Deposited:	01 Aug 2026 05:31
Last Modified:	01 Aug 2026 05:31
URI:	http://repository.its.ac.id/id/eprint/141216

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