Crash Simulation with Forming Data

The importance of new material applications for improved vehicle passive safety is increasing. Automotive companies are relying more and more on CAE methods to design and select materials for car body structures that fulfill the safety targets. This results in an increasing demand for improved quality of crash simulations. This quality heavily depends on the appropriate simulation strategies and methods used for these investigations.

For Advanced High Strength Steels (AHSS), such as the multiphase grades DP600 (HXT600X) or DP800 (HXT800X), the material properties change significantly due to work-hardening during cold forming in the manufacturing process. For an efficient development process of parts made out of AHSS the forming history needs therefore to be considered within the crash simulation. In this paper, studies (CAE and test including validation) will be presented that demonstrate the effects of the sheet metal forming history on the results of the crash simulation. Component and full car analyses are discussed.