Shape Optimization of Thin-Walled Tubes Under_Axial_Velocity

M Vinay Babu, K Veeraswamy

Abstract: In this study, the objective is to maximize the crash worthiness of thin-walled tubes under axial impact loads by shape optimization. As design variables, parameters defining the cross-sectional profile of the tube as well as parameters defining the longitudinal profile like the depths and lengths of the circumferential ribs and the taper angle are used. The methodology is applied to the design optimization of a Crush Cans supporting the bumper beam of a vehicle for the loading conditions in standard crash regulations. The crash event is simulated using explicit finite element method. Three Models are considered for the thin walled tubes which are modeled with feasible element quality criteria, and the Barrier is given rigid property. All the necessary loads and boundary conditions were applied as per the real time considerations and explicit analysis is done. The results indicate significant improvement in the crashworthiness over the benchmarks.

Keywords: Crush cans, Crash simulation, Thinwalled tubes