The Anisotropic Distortional Yield Surface Constitutive Model Based on the Chaboche Cyclic Plastic Model

Materials

Qiao Song¹  Yanjun Chang²  Jianyun Chen²  Keshi Zhang²  Zheng Kuang²  Guijuan Hu³ 

[1] F University, Hangzhou 311300, China;College of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, China;;School of Landscape Architecture, Zhejiang A &

关键词: anisotropic yield;    constitutive model;    subsequent yield surface;    distortional yield surface;   

DOI  :  10.3390/ma12030543

来源: DOAJ

【 摘 要 】

Considering the cross effect in the evolution of subsequent yield surfaces for metals, an anisotropic distortional yield surface constitutive model is developed. By introducing an anisotropic distortional hardening function into the isotropic hardening part of the classical Chaboche rate-dependent constitutive model, the plastic-deformation-induced distortional and anisotropic hardening behaviors of subsequent yield surfaces are characterized. The experimental data of distortional yield surfaces for T2 pure copper under three different loading paths, including pre-tension, pre-torsion, and pre-tension-torsion proportional loading of 45-degree, are simulated by implementing the models into a numerical user defined material (UMAT) procedure based on the ABAQUS finite element package. To validate the anisotropic plastic model, the simulated yield surfaces are compared with experimental observations and predicted results for a crystal plasticity model and good agreement are noted. The simulations demonstrate that the proposed model can accurately capture the characteristics of the distortional yield surface and the anisotropic hardening process of the yield surface. Moreover, the distortional shapes of experimental subsequent yield surfaces in loading direction and opposite direction can be better revealed by the anisotropic plastic constitutive model than the crystal plastic constitutive model.

【 授权许可】

Unknown