Effects of material failure criteria on design of vehicle parts under impact loading

Abstract

In this study, the effect of the failure criteria on the advanced high-strength steel and carbon steel B-pillar in case of a side impact is investigated to evaluate the effects of failure criteria on the accuracy of impact simulation. Three different failure criteria, namely Johnson-Cook, Bao-Xue-Wierzbicki and Biquad, are compared concerning B-pillar material energy absorption for different impact velocities. The effects of failure criteria on the side impact simulations are examined for these failure criteria and impact velocities. Energy absorption values increased as the impact velocity increased for all failure criteria. The results of simulations were compared with those without the failure criteria to evaluate the effects of failure criteria on side impact simulations. It is shown and validated that failure criteria must be taken into consideration for the accuracy of impact simulations of automotive components designed with different types of steels.

Keywords:

• B-pillar crash analysis
• failure criteria
• advanced high-strength steels
• carbon steel
• impact loading
• vehicle crashworthiness

Acknowledgements

The authors would like to express their sincere thanks and appreciation to R. A. İnan AĞIR (Pamukkale University) for supporting the drop tower test, Ferdi Eşiyok (Beyçelik-Gestamp) for the test samples and ST Engineering for Altair HyperCrash and Radioss licenses.

Disclosure statement

The authors declare that they have no conflicts of interest in this work.

Additional information

Funding

This study was supported by Scientific Research Coordination Unit of Pamukkale University under the project number 2019KKP090.