Torsion test for a BAJA chassis using gyroscopic sensor and validation of CAE results

Vehicle dynamics plays an important role in vehicle stability, handling, ride quality and control. The dynamics of vehicle are also dependent on vehicle chassis and hence torsional stiffness of chassis is an important property to consider. High torsional stiffness results in less vibrations and better handling. This paper presents a torsional analysis of the chassis of an All-terrain Vehicle (ATV) used in BAJA SAE competition. Experimental analysis is performed where chassis is put under load and deflections are measured using a gyroscopic sensor. FEM simulations are performed and results are compared to calculate error. The paper concludes with ways to improve torsional stiffness.