A thermo-mechanically coupled cyclic plasticity model at large deformations considering inelastic heat generation
In the process of inelastic deformation, cyclic accumulation of heat flux transferred from plastic work under cyclic loading results in an increased work temperature. The heat softening effects of material properties and external heat source will produce more plastic work. The fraction between plastic work and heat generation per unit volume can be introduced as a coupled source for thermal-mechanical analysis. Such coupling might be important in a simulation in which extensive inelastic deformation is accumulated fairly rapidly under cyclic loading and the mechanical properties are temperature dependent. To investigate the couple effect among temperature, stress and deformation under cyclic loading, a coupled thermo-mechanically cyclic plasticity model combined nonlinear isotropic hardening and kinematic hardening was established firstly in thermodynamics frame at large deformations. And then, the proposed model was implemented into finite element code ABAQUS by combining the user subroutine UMAT and UMATHT. Finally, some numerical results show the proposed model can capture thermal-induced necking in tensile loading, and the isotropic and kinematic hardening and thermal softening under cyclic loadings.
Inelastic heat generation ratchetting thermal softening cyclic loading
Qianhua Kan Guozheng Kang Wenyi Yan Yilin Zhu Han Jiang
Department of Applied Mechanics and Engineering,Southwest Jiaotong University,Chengdu,610031,China Department of Mechanical and Aerospace Engineering,Monash University,Clayton,VIC3800,Australia
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）