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All Journal Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering
Ali Saifullah, Ali
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Mechanical Engineering

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The Effect of Heat Treatment on Hardness and Microstructure of Al-Cu Squeeze Casting Product Saifullah, Ali; Reynaldi, Ferdian; Aisyah, Iis Siti; Heri Soegiharto, Achmad Fauzan
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol 4, No 1 (2019)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (702.787 KB) | DOI: 10.22219/jemmme.v4i1.8531

Abstract

This research was conducted with the purpose of knowing the change mechanical properties of Al - Cu squeeze casting product which applied  heat treatment and quenching. This study uses Al with the addition  of 2% and 4% Cu,with the squeeze casting pressures applied are 100, 200, 300 and 400 bar.  Heat treatment temperature constant at 520 ° C and 90 minute holding time. The heat treatment results were observed using Optical Microscopy with 800 times magnification and the hardness was measured using the Vickers hardness test method. . The highest result of hardness is on the pressure  400 bar with the addition of 4% Cu which is 120.53 VHN and the average percentage of the most Al2Cu compounds is 23.125%. Heat treatment followed by quenching process significantly increase the hardness, it is  because of the more solid and smaller granular shape due to quenching
SIMULATION OF MONOCOQUE CHASSIS STRUCTURE OF ELECTRIC VEHICLES BASED ON COMPOSITE MATERIALS Daryono, Daryono; Yusvana, Bima Fatureza; Saifullah, Ali
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.2212

Abstract

The chassis is one of the main components in a prototype electric motor vehicle, serving as the structural support for the drivetrain, steering system, and driver safety. This study aims to design and simulate a monocoque composite chassis as an alternative to the conventional ladder frame. The methodology employed finite element analysis using Ansys Composite Pre-Post (ACP) to define ply details, orientation, and laminate thickness. The materials used were Epoxy Unidirectional Carbon Fiber, Epoxy Carbon Woven, and PVC Foam as the core. The simulation results indicate that the chassis experienced a maximum deformation of 0.8933 mm, a maximum principal stress of 34.53 MPa, and a maximum principal elastic strain of 0.001028 mm/mm. The composite failure criterion value of 0.2666 (< 1) shows that the structure remains in a safe condition. Furthermore, the monocoque design successfully reduced the mass by 3.1 kg compared to the previous chassis, supporting improved vehicle efficiency. Overall, this study demonstrates that the monocoque composite chassis design provides a better combination of strength, stiffness, and mass efficiency compared to the ladder frame and has strong potential for application in the development of prototype electric motor vehicles.
Co-Authors Daryono Daryono, Daryono Heri Soegiharto, Achmad Fauzan Iis Siti Aisyah Reynaldi, Ferdian Yusvana, Bima Fatureza