Transactions of Materials and Heat Treatment

Title：Research on springback of advanced high-strength-steel plate based on non-elastic recovery

Authors： Yang Rui

Unit： Northeast Petroleum University

KeyWords： advanced high strength steel plate non-elastic recovery elasticity modulus material constitutive model springback simulation

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(12):35-42

Abstract：

Considering the obvious non-elastic recovery phenomenon of advanced high strength steel plate after unloading, its principle was analyzed deeply from energy aspect, and based on the pre-plastic strain and unload elastic modulus, the material constitutive model was set up to simulate and predict the spring by the theory of non-elastic recovery strain with two-yield-surface in the loading-unloading process. For the beam-type parts, it was compared the differences of the experimental results with the springback simulation results, which were obtained by the new unload elastic modulus constitutive, Yoshida constitutive and conventional elastic modulus constitutive. Research results show that the non-elastic recovery strain is of the characteristics of reversibility and energy consumption, and it is the most important reason of non-elastic recovery phenomenon. Furthermore, the results of springback simulation obtained by the new material constitutive model are in good agreement with the experimental results, and the accuracy of the springback simulation is improved comparing with that of other models.

Funds：

作者简介：杨蕊（1982-），女，博士研究生，讲师

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