Studi Numerik Kekuatan Bahan pada Struktur Sasis Mobil Microcar dengan Beban Statis dan Dinamis

Rahmatia, Rahmatia (2025) Studi Numerik Kekuatan Bahan pada Struktur Sasis Mobil Microcar dengan Beban Statis dan Dinamis. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pertumbuhan kendaraan mikro (microcar) sebagai solusi mobilitas perkotaan menuntut desain struktur yang efisien namun tetap kuat dan aman. Penelitian ini bertujuan untuk menganalisis performa struktural chassis microcar menggunakan pendekatan simulasi numerik berbasis Metode Elemen Hingga (Finite Element Method/FEM) dengan perangkat lunak ANSYS Workbench. Evaluasi dilakukan terhadap lima jenis material—Aluminium 6061-T6, Aluminium 6082, Steel AISI 1018, Steel S355JR, dan Carbon Fiber Reinforced Polymer (CFRP) Prepreg melalui analisis statis, dinamis, dan pendekatan Multikriteria (MCDM) yaitu Analytic Hierarchy Process (AHP) dan Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) . Hasil simulasi menunjukkan bahwa semua material memiliki nilai safety factor di atas 1, dengan CFRP prepreg mencatat nilai tertinggi. Hasil keputusan dengan metode Multikriteria (MCDM) menunjukkan Steel AISI 1018 mempunyai skor tertinggi yaitu 0.9434. Pada analisis dinamis, seluruh struktur menunjukkan respons aman terhadap beban getaran acak akibat ketidakteraturan permukaan jalan, meskipun terdapat potensi resonansi pada frekuensi tertentu. Oleh karena itu, analisis kelelahan (fatigue) direkomendasikan untuk evaluasi jangka panjang. Studi ini memberikan kontribusi penting terhadap perancangan chassis microcar yang ringan, aman, dan berkelanjutan. Kata kunci: Finite Element Method, ANSYS Workbench, safety factor, Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS)
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The growth of microcars as an urban mobility solution demands a structural design that is both efficient and remains strong and safe. This study aims to analyze the structural performance of a microcar chassis using a numerical simulation approach based on the Finite Element Method (FEM) with ANSYS Workbench software. The evaluation was carried out on five types of materials—Aluminum 6061-T6, Aluminum 6082, Steel AISI 1018, Steel S355JR, and Carbon Fiber Reinforced Polymer (CFRP) Prepreg—through static and dynamic analyses, as well as a Multi-Criteria Decision Making (MCDM) approach, namely the Analytic Hierarchy Process (AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). The simulation results show that all materials have a safety factor above 1, with CFRP prepreg recording the highest value. The decision results using the Multi-Criteria (MCDM) method indicate that Steel AISI 1018 has the highest score, at 0.9434. In the dynamic analysis, all structures demonstrated a safe response to random vibration loads caused by road surface irregularities, although there is potential for resonance at certain frequencies. Therefore, fatigue analysis is recommended for long-term evaluation. This study makes a significant contribution to the design of lightweight, safe, and sustainable microcar chassis.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Finite Element Method, ANSYS Workbench, safety factor, Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS)
Subjects:	T Technology > T Technology (General) > T57.62 Simulation T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30101-(S2) Master Thesis
Depositing User:	Rahmatia Rahmatia
Date Deposited:	07 Aug 2025 08:34
Last Modified:	07 Aug 2025 08:34
URI:	http://repository.its.ac.id/id/eprint/127927

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