Constitutive modeling of cyclic hardening and nonproportional hardening of polycrystalline copper
A constitutive model is developed based on the framework using a yield surface together with the Armstrong-Frederick type kinematic hardening rule. The backstress is decomposed into additive parts with each part following the Armstrong-Frederick type hardening rule. A memory surface in the plastic strain space is introduced to account for the strain range effect. The Tanaka fourth rank tensor is used to characterize the nonproportional loading. A set of material constants in the hardening rules related to the memory size and the accumulative plastic strain are used to capture both the transient and saturated deformation behavior. The developed constitutive model can describe very well the significant cyclic hardening and nonproportional hardening of a polycrystalline copper.
Yan-yao Jiang Ji-xi Zhang
University of Nevada, Reno, Department of Mechanical Engineering (312), Reno, NV 89557, USA
国际会议
The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)
上海
英文
184-189
2007-06-11（万方平台首次上网日期，不代表论文的发表时间）