Viscoplastic Deformation Analysis Using the Unified Constitutive Model.

In this paper, a series of experiments, which showed the interaction between plasticity and creep, were carried out and the unified constitutive model was proposed. First, experiments such as pure tension, pure creep, cyclic loading, intermittent creep during cyclic loading and subsequent creep after cyclic loading were conducted using Type 304 stainless steel at room temperature. Then considering the equivalence of back stresses in plastic and creep deformations, the unified constitutive model was constructed and using the proposed model the experimental results were well simulated.