Analysis of an Automobile Roof Panel under Strongly Coupled Fluid Structure Interaction using LS-Dyna

Accurately and efficiently simulating strongly coupled fluid structure interactions has been a challenge. In this presented study, the interaction of a lab-scale experiment using an automotive roof panel with an air flow applied through a pipe from a compressed air tank was analyzed using LS-DYNA multi-physics solver. The purpose of the analysis was the evaluation of the accuracy of deformation, strain, and the pressure distribution on the panel due to the fluid structure interaction. The steel roof panel was modeled with material strain rate properties and the post stamping simulation results applied to take into account the thinning and work hardening effects. These analysis results were compared with those of actual tests and predictive accuracy along with computational costs were summarized.