MODEL OF VISCOPLASTICITY WITH PARALLEL DEFORMATION MECHANISMS.

摘要

A model of viscoplastic deformation for strengthening materials is considered within which metal deformation is governed by two independent (parallel) mechanisms. Each of these mechanisms corresponds to anisotropic creep theory with linear strengthening into which an isotropic strengthening parameter is introduced common for both mechanisms. The concept of surface flow is not used. In the second part of the article, unilateral strain accumulation (ratcheting) is considered in structures at elevated temperature and with cyclic loading. The possibilities of the model are demonstrated with description of experiments on austenitic stainless steel specimens with different programs for a change in load.