Prediction of material thermomechanical response with a unified viscoplastic constitutive model

A review of some plasticity and viscoplasticity constitutive theories

“…Introduced also by the author in the unified viscoplastic constitutive equations using the nonlinear Armstrong-Frederick format (Chaboche, 1977b), it was a subject of discussion all along the past twenty years, for instance by Walker (1981), Moreno and Jordan (1986), Hartmann (1990), Ohno et al (1989), Ohno (1990), Lee and Krempl (1991). For kinematic hardening this rate term, considered as necessary for obtaining stable conditions, is as follows (only one back-stress is considered here):…”

Advanced Methods of Fatigue Assessment

“…4.11 Hysteresis loop of load cycle over crack opening displacement (CTOD) with crack closure; measurement results; (Pippan et al 2011) method was applied to investigate the crack closure phenomenon under plane strain conditions (Fleck and Newman 1988). Being aware of the vital importance of the material model, Jiang and Feng applied the plasticity model according to Jiang in their crack propagation simulations (Jiang and Feng 2004;Jiang 1995 (Andersson et al 2004;Moreno and Jordan 1986). As a consequence, these authors were able to perform a rigorous study on the effects of the modelling techniques on the accuracy of the calculated results.…”

Modeling of a nonisothermal flow with regard for the dependence of plastic properties on the microstructure of a material

“…For describing the thermomechanical behavior of an isotropic material, the Bodner-Partom (B-P) model [11] modified in [5,18] is used. The model includes the following equations:…”