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http://dx.doi.org/10.5228/KSPP.2005.14.4.327

Two Back Stress Hardening Models in Rate Independent Rigid Plasticity  

Yun S. J. (국방과학연구소)
Publication Information
Transactions of Materials Processing / v.14, no.4, 2005 , pp. 327-337 More about this Journal
Abstract
In the present work, the two back stress kinematic hardening models are proposed by combining Armstrong-Frederick, Phillips and Ziegler's hardening rules. Simple combination of hardening rules using simple rule of mixtures results in various evolutions of the kinematic hardening parameter. Using the combined hardening models the ultimate back stress fur the present models is also derived. The stress rate is co-rotated with respect to the spin of substructure due to the assumption of kinematic hardening rule in finite deformation regime. The work piece under consideration is assumed to consist of the elastic and the rigid plastic deformation zone. Then, the J2 deformation theory is facilitated to characterize the plastic deformation behavior under various loading conditions. The plastic deformation localization behaviors strongly depend on the constitutive description namely back stress evolution and its hardening parameters. Then, the analysis for Swift's effects under the fixed boundaries in axial directions is carried out using simple shear deformation.
Keywords
Finite Plastic Deformation; Two-Back Stress; Kinematic Hardening; Rigid Plasticity; Plastic Spin;
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