An endochronic constitutive model for rate-dependent and nonproportional cyclic plasticity |
| |
Authors: | Zhao Shexu and Kuang Zhenbang |
| |
Institution: | (1) Department of Civil Engineering, Huaqiao University, 362011 Quanzhou, China;(2) Department of Engineering Mechanics, Shanghai Jiaotong University, 200240 Shanghai, China |
| |
Abstract: | The total stress response of material is decomposed into a sum of an equilibrium stress response and a non-equilibrium overstress
response. Correspondingly, the rate-independent intrinsic time and the rate-dependent intrinsic time are defined respectively.
Additional hardening functions for describing the isotropic and anisotropic nonproportional effects are assumed to be related
to the accumulation of plastic strain component along the normal of equilibrium stress trajectory, in which the effects of
geometry of the loading path are included. An endochronic constitutive model for rate-dependent, nonproportional cyclic plasticity
is formulated and applied to simulate the stress responses of stainless steel XCrNi18.9 for some typical loading programs
at different loading rates. A comparison between predicted results and experimental ones by Haupt and Lion shows that the
former are in agrreement with the latter. |
| |
Keywords: | nonproportional loading rate-dependence overstress endochronic constitutive equations |
本文献已被 SpringerLink 等数据库收录! |