A Study on The Hybrid Finite Element Modeling for Side Impact Simulation

In this study we suggest simplified and design oriented hybrid modeling methodology to the development of crashworthy structure. This hybrid model consists of main structure, which are modeled by beam and springs and doors modeled by shells. The main structures such as B-pillar roof rail and side sill are represented by nonlinear springs which have the same section properties as shell model have. The localized collapse of main structures are represented by non-linear spring elements whose moment-rotation characteristic is calculated based on Wierzbicki’s equation. The joint parts are represented by non-linear springs, which have the same moment-rotation characteristics as those of real parts to hold actual collapse characteristics. To represent force transition between structure and door, anti-sliding shells are introduced in the area of side-sill and lower part of Bpillar. Using this hybrid modeling methodology, we can get a good correlated result for full model and reduce calculation times around 80% for full FE shell model.