ANALISA KEKUATAN DESAIN UPPER ARM PADA SISTEM SUSPENSI KENDARAAN SAAT BERBELOK

Djatinegoro, Sultantyo (2025) ANALISA KEKUATAN DESAIN UPPER ARM PADA SISTEM SUSPENSI KENDARAAN SAAT BERBELOK. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini membahas pengembangan desain upper arm pada sistem suspensi semi-aktif kendaraan dengan tujuan meningkatkan performa struktural saat kendaraan bermanuver, khususnya pada kondisi menikung. Kajian dilakukan menggunakan pendekatan simulasi numerik berbasis metode elemen hingga (Finite Element Method) melalui perangkat lunak Ansys Workbench. Model kendaraan yang digunakan adalah Toyota FT86 dengan konfigurasi suspensi double wishbone, yang dikenal responsif terhadap dinamika lateral dan representatif untuk pengujian simulasi suspensi. Material EN-19 (AISI 4140) dipilih sebagai bahan utama upper arm karena memiliki kekuatan tarik tinggi, ketahanan terhadap beban siklik, serta keuletan yang baik. Optimalisasi desain dilakukan melalui pendekatan topology optimization, penyesuaian geometri untuk efisiensi struktural, penerapan toleransi bebas (freeplay), serta penyederhanaan sambungan mekanis untuk mendukung efisiensi manufaktur dan perakitan. Simulasi dilakukan pada berbagai skenario kecepatan kendaraan (0–70 km/h) untuk mengevaluasi respons deformasi, tegangan Von Mises, dan faktor keamanan akibat gaya lateral (Fsx) dan gaya vertikal (Fz).
Hasil simulasi menunjukkan bahwa desain pengembangan mampu menahan beban secara efektif dengan nilai deformasi maksimum sebesar 0,00127 mm dan tegangan Von Mises sebesar 4,87 MPa, keduanya masih berada dalam batas aman menurut karakteristik material. Selain itu, terjadi pengurangan massa upper arm sebesar 32,35%, dari 3,20 kg pada desain awal menjadi 2,17 kg tanpa mengorbankan integritas struktural. Penelitian ini memberikan kontribusi terhadap desain suspensi semi-aktif yang lebih adaptif, ringan, kuat, dan efisien untuk aplikasi kendaraan modern. komprehensif untuk desain komponen otomotif masa depan yang lebih aman, ringan, dan ekonomis.
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This study focuses on the design development of the upper arm component in a semi-active vehicle suspension system, aiming to enhance structural performance during cornering maneuvers. A numerical simulation approach based on the Finite Element Method (FEM) was employed using Ansys Workbench. The Toyota FT86 was selected as the reference model due to its double wishbone suspension configuration, which is known for its responsiveness to lateral dynamics and suitability for suspension simulation analysis. EN-19 (AISI 4140) alloy steel was selected as the primary material for the upper arm due to its high tensile strength, excellent fatigue resistance, and superior toughness. The design was optimized through a topology optimization process, with geometry refinement for structural efficiency, implementation of freeplay tolerances to prevent component interference, and simplification of mechanical joints to enhance manufacturing and assembly efficiency. Simulations were conducted across a range of vehicle speeds (0–70 km/h) to evaluate deformation response, Von Mises stress, and safety factor under lateral (Fsx) and vertical (Fz) loading conditions.
The simulation results demonstrated that the redesigned upper arm effectively withstands the applied loads, with a maximum deformation of 0.00127 mm and a Von Mises stress of 4.87 MPa, both well within the safe limits of the selected material. Additionally, the new design achieved a mass reduction of 32.35%, decreasing from 3.20 kg to 2.17 kg, without compromising structural integrity. This research contributes to the advancement of lightweight, structurally sound, and adaptable suspension components for future vehicle applications.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Lengan ayun atas, Suspensi semi-aktif, FEM, Ansys, Topology Optimazation Upper arm, Semi-active suspension, FEM, Ansys, Topology Optimization
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL257 Springs and suspension T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL270 Automobiles--Wheels--Alignment.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Sultantyo Djatinegoro
Date Deposited:	04 Aug 2025 03:18
Last Modified:	04 Aug 2025 03:18
URI:	http://repository.its.ac.id/id/eprint/126044

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