Modeling of the cyclic plastic behaviour of metallic alloys

摘要

This study is concerned with the development of a theoretical model capable of predicting the cycle-dependent behavior of metallic components under multiaxial state of stress. The model is based upon a generalization of the plastic flow and hardening rules developed by Eisenberg (1) and accounts for the effects of cyclic plasticity and decay of the mean stress under strain controlled cycling. To verify certain aspects of the model a number of uniaxial cyclic plasticity tests were conducted on samples made from annealed 304 stainless steel and cold drawn 1018 steel. The tests were conducted at room temperature under strain control using an electrohydraulic digital servo-controlled testing equipment. A good correlation between the theoretical predictions and the experimental findings for uniaxial cyclic loading for the tested materials, which exhibit contrasting behaviors, is observed.