Constitutive modeling of cyclic plasticity deformation of a pure polycrystalline copper

摘要: Abstract Cyclic plasticity experiments were conducted on a pure polycrystalline copper and the material was found to display significant cyclic hardening nonproportional hardening. An effort made describe behavior of material. The model is based framework using yield surface together with Armstrong–Frederick type kinematic rule. No isotropic considered stress assumed be constant. backstress decomposed into additive parts each part following A memory in plastic strain space used account for range effect. Tanaka fourth order tensor characterize loading. set parameters rules are related size they capture effect dependence loading magnitude. constitutive can well transient during copper. Modeling long-term ratcheting deformation difficult task further investigations required.