Numerical investigation of the Bauschinger effect during the low reversal cyclic torsion, three point bending and tension/compression tests

Résumé

Creation of a robust numerical model of the low cyclic deformation processes is essential for accurate predictions of the inhomogeneities occurring during industrial processes, especially when sheet materials are considered. Development of such model is the main subject of the present work. In order to evaluate material behavior under cyclic deformation conditions several simple plastometric test were selected. Particular attention is paid to the effect of the cyclic deformation on the material behavior along the radius of the deformed cylindrical sample in cyclic torsion and tension/ compression tests, as well as along thickness of the sample in the three point bending. Obtained results are also compared with the commonly used in industry conventional isotropic hardening model. Finally, based on this analysis, conclusions regarding the possibility to apply investigated tests in identification of the material model parameters through the inverse analysis are drawn.