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Journal : Automotive Experiences

Design and Crash Test on a Two-Passenger City Car Frame using Finite Element Method Putra, Randi Purnama; Yuvenda, Dori; Afnison, Wanda; Lapisa, Remon; Milana, Milana; Fauza, Anna Niska; Harmanto, Dani
Automotive Experiences Vol 7 No 2 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.11306

Abstract

The chassis is an important part of a car which must have a strong construction to withstand the weight of the vehicle. The purpose of this research is to create a city car's chassis that can hold two passengers and then crash-test the finished product. In this research, a development method was used using SolidWorks software and the student version of ANSYS R2 2023 as software for creating chassis designs and crash test simulations. The study's findings indicate that the car frame's measurements are 2.46 meters in length, 1.33 meters in height, and 1.39 meters in width. The steel of the ASTM A36 type was utilized as the material in the computational study of the frame. The results show that increasing speed causes an increase in deformation, with the peak deformation at a speed of 100 km/h. The maximum deformation occurs at 0.007 seconds with a value of 203.51 mm at the top pillar of the car. The deformation increases from 97.196 mm at 0.0035 s to 161.22 mm at 0.0056 s. However, deformation occurs mainly in the front zone of the car frame and is not significant in the passenger zone.
Aerodynamic Approach to Two-Passenger City Car Design: A Study of Square Back and Compact Shapes Putra, Randi Purnama; Yuvenda, Dori; Lapisa, Remon; Afnison, Wanda; Milana, Milana; Setiawan, M. Yasep; Arif, Ahmad; Harmanto, Dani
Automotive Experiences Vol 8 No 2 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13686

Abstract

The development of lightweight electric cars for urban mobility requires efficient aerodynamic design without sacrificing space efficiency. This study presents a novel method by investigating the combination of a two-seater city car's compact dimensions and square back shape, which has not been extensively researched for low- to medium-velocity vehicles. This study's objective is to assess the design's aerodynamic performance using numerical simulations using the Computational Fluid Dynamics (CFD) approach. The vehicle model is designed with a compact body and square back, which is commonly used in small vehicles with high maneuverability requirements. The simulations are conducted at three different air velocity levels: 10, 20, and 30 m/s. The results of the study showed an increase in the value of the drag coefficient (Cd) along with an increase in flow velocity. At a velocity of 10 m/s, the Cd value was recorded at 0.4536. When the velocity increased to 20 m/s, the drag coefficient increased slightly to 0.4563. Further increases in velocity to 30 m/s resulted in a Cd value of 0.4581. This Cd value shows the consistency of aerodynamic performance with increasing velocity, with fluctuations that remain within the efficiency limits of lightweight vehicles. The pressure distribution contour shows high-pressure accumulation at the front and low pressure at the rear of the vehicle, which generates large turbulent wakes in the rear area and contributes to increased drag. These findings indicate that the square rear body design faces significant aerodynamic challenges. Therefore, design strategies such as adding a rear spoiler, using a rear diffuser, and optimizing the rear body angle are suggested as potential solutions to improve flow efficiency.
Co-Authors - Primawati A, Yufrizal Adityo Adityo, Adityo Ahlal Fikri, Rivandy Ahmad Arif Ahmad Arif Ahmad Shafwan Hadi Altarisi, Muhammad Athar Ambiyar, Ambiyar Andira, Muhammad Fadil Andre Kurniawan Andre Kurniawan Andre Kurniawan Andri Fadhil Arwizet Arwizet, Arwizet Aswanto, Trio Harinaldi Ayusran, Reyvanda Bahrul Amin Budi Syahri Bulkia Rahim Delima Yanti Sari Donny Fernandez Dori Yuvenda Eddy Marheni Eko Indrawan Eko Purnomo Elviza Yeni Putri Erizon, Nelvi Erzeddin Alwi Faisal Amri Falah, M. Jalaluddin Fauza, Anna Niska Febri Prasetya Fiki Efendi Fikri, Hukmanul Hardi, Farid Maulana Hari Sabarno Harmanto, Dani Hasan Maksum Hasnul Fikri Hendra Dani Saputra Ihsan, Fachrul ilham yuliady Irma Yulia Basri Irzal, Irzal Jermaina, Nina Juli Sardi Jumadil Ashari Junil Adri Khairul, Farid M. Yasep Setiawan Makruf, Zulhan Insan Masykur Masykur Milana Milana Muhammad Farhan Muhammad Restu Alhamdi Muslim Muslim Muslim Muslim Mutiara Felicita Amsal Nikolas Verdian Guci Nurdin Hendri Nuzul Hidayat, Nuzul Okky Syaifatul, Achmad Purwanto, Wawan Purwantono Purwantono Purwantono, Purwantono Putra, Nandri Pratama Putra, Randi Purnama R. Chandra Rahmadani Rahmadani Rahmadiawan, Dieter Ramadhan, Raihan Randi Purnama Putra Remon Lapisa Remon Lapisa Resti Apriliyanti Rifelino Rifelino Rizky Rahman Satria, Andam Sugiarto, Toto Utama, Alparis Nico Putra Utomo Wisesa, Budi Wagino Wakhinuddin Wakhinuddin, Wakhinuddin Waskito Waskito Waskito, Waskito Wifa, Iklil Yanto, Doni Tri Putra Yoga Volanda Saputra Yogi Dian Alfana Yuliady, Ilham Zainal Abadi Zulfadli, Fadli