Browse Publications Technical Papers 2020-28-0381

Experimental Analysis and Validation of Torsional Stiffness of Tubular Space Frame Chassis. 2020-28-0381

Chassis is the part that integrates all components of the vehicle and to withstand the loads. It provides a load path for the forces that acts on it. Handling of a car can be improved by tailoring chassis stiffness so that chassis does not deflect during heavy cornering or breaking. In this work, the effects of overall chassis Rigidity on roll stiffness will be determined by creating a Finite element modelof a Formula Student (FSAE) Chassis and suspension linkage. The Validation of the model is done by designing and fabricating a test rig to experimentally determine the Torsional Stiffness. The Suspension linkages are replaced with equivalent length solid tubes to eliminate the suspension compression. The test rig will be capable of applying force through one of the front wheel hubs, the other end of the front axle is kept at zero load. The deflection in chassis can be measured using a dial gauge. The objective of this project is to Design and optimize the chassis for meeting the Chassis Stiffness target value to obtain the best Lateral Dynamics. The optimization is done in such a way that the weight of the chassis is not affected. Increasing the Torsional Rigidity will reduce the twist in the Chassis and allows the suspension components to control a larger percentage of a vehicle's kinematics. KEY WORDS: Chassis, FSAE, Torsional Stiffness


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