ABSTRACT
The hierarchical single-surface (HISS) plasticity models provide a general formulation for the elastoplastic characterization of the material behavior. These models, which can allow for isotropic and anisotropic hardening, and associated and nonassociated plasticity characterizations, can be used to represent material response based on the continuum plasticity theory (1-6). In the case of the DSC, they can be used to represent the RI response; in many cases, the basic and simplest version, HISS-
, that allows for isotropic hardening and associated response has been used. It may be mentioned that use of plasticity theory is one of the possible ways to characterize the RI behavior. However, the DSC can be formulated by simulating the (RI) response as nonlinear with irreversible deformations, without invoking the theory of plasticity.
