A Description of Bauschinger Curves Based on the Random Barriers Theory

概要

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A new approach to describing the Bauschinger curves for metals is presented on the concept of the field of the resisting force against the movement of dislocations. In a previous paper, it has been clarified that the cyclic plasticity model, proposed by the authors based on this concept, would be applicable to the quantitative descriptions of various cyclic deformation phenomena in the steady state, and the tensile stress-strain curves with a different type of yielding. In this paper, the Bauschinger curve can be expressed by applying this concept with some assumptions of the changes in the field of the resisting force caused by pre-loading. This has provided a satisfactory agreement with each experimental curve for a carbon steel and a brass with a wide range of strains.