Establishment of Strain Rate Dependent Constitutive Model for Roll Forming Process

Abstract

Abstract:

Abstract： The strain rate ranges were determined and the uniaxial tensile tests of DP 980 steel sheet under three strain rates were performed. With the nonlinear fitting of the experiment data, the strain rate dependent JohnsonCook constitutive model was established. Meanwhile, an finite element model of roll forming process with the established constitutive model was constructed, and the corresponding experiment was conducted. The resrults indicate that the established constitutive model is reliable, and can be used in further study of roll forming process optimization.

Key words: advanced high strength steel, roll forming, strain rate, constitutive model

CLC Number:

TG 386.3

YAN Yu,WANG Haibo,ZHAO Wei. Establishment of Strain Rate Dependent Constitutive Model for Roll Forming Process[J]. Journal of Shanghai Jiaotong University, 2015, 49(01): 7-11.

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