DOI: 10.5176/2251-1857_M318.12
Authors: K.Koushik, Nataraj J.R.
Abstract: An All-Terrain Vehicle (ATV) is designed to traverse on harsh terrains. High loads and forces in different directions act on the vehicle. Material used for roll cage is Chromoly 4130. Some researchers have performed crash tests on many commercial cars, bus frames, and chassis of formula car and even imitated the crash scenarios to understand the causes and types of failure in the components of a car, but there aren’t many studies focused on ATV’s. Fabrication of the roll cage, tube bending is to be done accurately so that they go and fix at the desired points. The objectives of the project is first to design a light weight reliable roll cage and fabricate it and second is to check if the roll cage designed can resist all possible impacts via simulation. The roll cage is designed using CATIA V5 as per the rules of BAJA SAE International and was analyzed for different crash scenarios like frontal, side, rear and rollover impacts using RADIOSS solver. Chassis fabrication was done. The overall chassis weight is 27kg. Stresses and displacements in different Impact Simulations such as frontal, side, roll over, rear results for velocities ranging from 30 - 60Kmph showed that the chassis design is safe and reliable. The CMM measurement showed that chassis were fabricated with the maximum deviation of 4.23mm in the rear shock mounting point.
Keywords: ATV, Chromoly4130, Chassisi design, Impact simulation, Fabrication, CMM.
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