Transactions of Materials and Heat Treatment

Title：Study on impact property of Q & P steel based on capshaped impact test

Authors： Ye You Deng Lulu Lian Changwei Liu Shuwen

Unit： Pan Asia Technical Automotive Center Co. Ltd. Tongji University Research Institute of Baoshan Iron & Steel Co. Ltd.

KeyWords： Q & P steel impact property capshaped impact test simulation analysis advanced high strength steel

ClassificationCode：TG142

year,vol(issue):pagenumber：2018,43(6):172-179

Abstract：

Impact and energy absorption properties are important features of high strength steel in the automotive safety. Based on capshaped impact test and finite element analysis, the energy absorption characteristics and regularity of QP980, DP980 and DP780 were compared and analyzed, and three kinds of plate capshaped specimens with thickness of 1.6 mm were conducted by the impact test. Then, the above impact tests were simulated by finite element method, and the accuracy of the simulation model was verified by comparing curves of crushing force versus time, maximum crushing distance and deformation modes in finite element simulation and experiment under the same impact velocity. Furthermore, the deformation mode and deformation behavior of the specimens under different initial impact energies were predicted based on the simulation model. Finally, the energy absorption characteristics and regularity of QP980, DP980 and DP780 were compared and analyzed by experiments and finite element simulation. The results show that the impact properties of QP980 are better, and the deformation modes of capshaped parts DP980 and QP980 are basically the same under the same impact energy.

Funds：

叶又（1968-），男，博士，高级工程师；Email：you_ye@patac.com.cn

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