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Constitutive Description of Viscoplasticity Accounting for Shear Banding
This chapter provides the study of viscoplastic flow processes accounting for shear banding. An account for deformation‐induced anisotropy, e.g. kinematic hardening, appeared particularly demanding. The dominant mechanism of shear banding appears in polycrystalline metallic solid deforming in multiple slip systems. The solution of the nonlinear regression problem using the method of global optimisation appeared necessary with the automatic procedure of identifying the unknown scalar function describing the contribution of shear bands in plastic shear–strain rate. The application of Teflon plates covering the contact surfaces of the matrix and the sample reduces the usual effects of friction. The viscoplastic flow law at the level of a single‐slip system is active. The detailed analysis of micromechanical mechanisms controlling the inelastic behaviour can give physical motivation for the constitutive description based on two viscoplastic flow mechanisms: dislocation controlled slip and shear banding.
Constitutive Description of Viscoplasticity Accounting for Shear Banding
This chapter provides the study of viscoplastic flow processes accounting for shear banding. An account for deformation‐induced anisotropy, e.g. kinematic hardening, appeared particularly demanding. The dominant mechanism of shear banding appears in polycrystalline metallic solid deforming in multiple slip systems. The solution of the nonlinear regression problem using the method of global optimisation appeared necessary with the automatic procedure of identifying the unknown scalar function describing the contribution of shear bands in plastic shear–strain rate. The application of Teflon plates covering the contact surfaces of the matrix and the sample reduces the usual effects of friction. The viscoplastic flow law at the level of a single‐slip system is active. The detailed analysis of micromechanical mechanisms controlling the inelastic behaviour can give physical motivation for the constitutive description based on two viscoplastic flow mechanisms: dislocation controlled slip and shear banding.
Constitutive Description of Viscoplasticity Accounting for Shear Banding
Pęcherski, Ryszard B. (author)
2022-07-18
23 pages
Article/Chapter (Book)
Electronic Resource
English
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