Abstract
In order to describe cyclic plasticity phenomena plastic stretching within a yield surface has to be considered, whilst conventional elastoplastic constitutive equations are only capable of describing deformation behaviour for a stress path near the monotonic/proportional loading. The subloading surface model categorized in the unconventional plasticity model and describing a smooth elastic-plastic transition would be applicable to non-proportional loading process including cyclic loading behavior of materials with a smooth yield surface. In this study the model is extended for materials exhibiting an elastic response under a particular state of stress, named elastic boundary, whilst they also exhibit a smooth elastic-plastic transition.
