Parameter Determination and Application Research of Mixed Hardening Model Based on Cyclic Tension-compression Test

doi:10.3901/JME.2020.02.063

Abstract

Abstract: The elastoplastic constitutive model of materials is the most important factor affecting the accuracy of finite element simulation. The mixed hardening constitutive model can accurately represent the real hardening characteristics of the plastic deformation process of materials, and the accuracy of the finite element simulation is directly affected by the accuracy of the material parameters of the mixed hardening constitutive model. Based on Hill48 anisotropy yield criterion, and combined with Voce isotropic hardening model and Armstrong-Frederic nonlinear kinematic hardening model, an elastoplastic constitutive model of mixed hardening considering material anisotropy and Bauschinger effect is established. The cyclic stress-strain curves of DC54D+ZF galvanized sheet are obtained through cyclic tension-compression tests, and the material parameters of the mixed hardening model are accurately determined by the universal global optimization algorithm according to the constitutive equation of mixed hardening under unidirecextional stress state.The applicability of the constitutive model for the problems of cyclic tension-compression of sheet metal and sheet metal passing through drawbead is analyzed by using ABAQUS finite element software, which verifies the reliability and accuracy of the anisotropic mixed hardening constitutive model. Cyclic tension-compression test is an effective method to obtain the material parameters of the constitutive model directly and accurately.

Key words: anisotropic, Bauschinger effect, mixed hardening, cyclic tension-compression experiment, global optimization algorithm

CLC Number:

TG318

LI Qun, JIN Miao, ZOU Zongyuan, GUO Jia, YANG Cong. Parameter Determination and Application Research of Mixed Hardening Model Based on Cyclic Tension-compression Test[J]. Journal of Mechanical Engineering, 2020, 56(2): 63-68.

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