Analisis Simulasi Fatigue Life Dan Vibration Yang Terjadi Pada Chassis Hybrid Car Dengan Metode Finite Element Analysis (FEA)

Rahmatuloh, M. Maulana (2025) Analisis Simulasi Fatigue Life Dan Vibration Yang Terjadi Pada Chassis Hybrid Car Dengan Metode Finite Element Analysis (FEA). Diploma thesis, Institut Teknologi Sepuluh Nopember.

Text 2038211018-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (6MB) | Request a copy

Abstract

Dalam era modern, teknologi kendaraan hybrid menjadi inovasi utama dalam meningkatkan efisiensi konsumsi bahan bakar dan mengurangi emisi karbon. Kendaraan hybrid menggunakan kombinasi mesin pembakaran internal dan motor listrik, menjadikannya solusi ramah lingkungan sesuai dengan kebijakan pemerintah Indonesia dalam Peraturan Presiden Nomor 55 Tahun 2019. Salah satu komponen penting dalam desain kendaraan hybrid adalah chassis, yang harus mampu menahan beban statis maupun dinamis dan memiliki ketahanan terhadap kelelahan material dan getaran untuk memastikan keamanan serta kenyamanan berkendara. Penelitian ini bertujuan untuk menganalisis umur kelelahan (Fatigue Life) dan respon getaran harmonik pada chassis hybrid car menggunakan metode Finite Element Analysis (FEA). Analisa meliputi pemodelan 3D chassis dengan software Autodesk Inventor, simulasi fatigue life dan respon vibration dilakukan menggunakan software ANSYS Workbench untuk menganalisa fatigue dan respon vibration dari chassis hybrid car. Dua desain chassis dibandingkan, yaitu chassis lama dan chassis baru, menggunakan material AISI 1080. Simulasi dilakukan melalui tahapan static structural, modal analysis, dan harmonic response dengan software ANSYS Workbench. Hasil analisis menunjukkan bahwa kedua chassis memiliki fatigue life mencapai 10.000.000 cycle pada seluruh variasi pembebanan, serta nilai tegangan mean stress dan alternating stress chassis lama dan chassis baru kondisi A tercatat 31.21 MPa dan 29.13 MPa, kondisi B 35.79 MPa dan 33.67 MPa, kondisi C 48.12 MPa dan 48.64 MPa, sedangkan kondisi D mencapai 67.55 MPa dan 68.07 MPa. Nilai tegangan yang diperoleh berada di bawah batas kegagalan menurut kriteria diagram Goodman. Analisis harmonic response menunjukkan bahwa resonansi terjadi pada frekuensi sekitar 101–102 Hz. Chassis lama menghasilkan tegangan amplitudo maksimum sebesar 20,694 MPa dan deformasi 62,14 mm, sedangkan chassis baru hanya sebesar 4,24 MPa dan deformasi 18,027 mm. Perbedaan signifikan ini membuktikan bahwa chassis baru lebih efektif dalam meredam amplitudo tegangan dan deformasi akibat beban harmonik, sehingga memiliki stabilitas dinamis dan ketahanan struktural yang lebih baik. Oleh karena itu, desain chassis baru lebih layak untuk digunakan pada hybrid car yang memiliki karakteristik pembebanan dinamis yang kompleks.
================================================================================================================================
In the modern era, hybrid vehicle technology has become a key innovation in improving fuel efficiency and reducing carbon emissions. Hybrid vehicles utilize a combination of internal combustion engines and electric motors, making them an environmentally friendly solution aligned with the Indonesian government’s policy in Presidential Regulation No. 55 of 2019. One of the critical components in hybrid vehicle design is the chassis, which must be capable of withstanding both static and dynamic loads while maintaining resistance to material fatigue and vibrations to ensure driving safety and comfort. This study aims to analyze the fatigue life and harmonic vibration response of a hybrid car chassis using the Finite Element Analysis (FEA) method. The analysis involves 3D chassis modeling with Autodesk Inventor software, while fatigue life and vibration response simulations were conducted using ANSYS Workbench to evaluate the fatigue and vibration response of the hybrid car chassis. Two chassis designs, the old and the new, were compared using AISI 1080 material. The simulation was carried out through static structural analysis, modal analysis, and harmonic response using ANSYS Workbench. The results show that both chassis designs achieved a fatigue life of up to 10,000,000 cycles under all loading variations. The mean stress and alternating stress values for the old and new chassis in condition A were recorded at 31.21 MPa and 29.13 MPa, condition B at 35.79 MPa and 33.67 MPa, condition C at 48.12 MPa and 48.64 MPa, and condition D at 67.55 MPa and 68.07 MPa. These stress values are below the failure limit according to the Goodman diagram criteria. The harmonic response analysis revealed that resonance occurred at a frequency of around 101–102 Hz. The old chassis generated a maximum stress amplitude of 20.694 MPa and deformation of 62.14 mm, while the new chassis only produced 4.24 MPa and deformation of 18.027 mm. This significant difference demonstrates that the new chassis is more effective in damping stress amplitude and deformation caused by harmonic loads, thereby offering better dynamic stability and structural durability. Therefore, the new chassis design is more suitable for use in hybrid cars with complex dynamic loading characteristics.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Chassis, Fatigue Life, Finite Element Analysis (FEA), Respone Vibration
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA174 Computer-aided design. T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	M Maulana Rahmatuloh
Date Deposited:	30 Jul 2025 01:33
Last Modified:	30 Jul 2025 01:33
URI:	http://repository.its.ac.id/id/eprint/123086

Actions (login required)

View Item