Viscoplastic selfconsistent modelling of the anisotropic behavior of voided polycrystals
- Ricardo A.
- Paul J.
In this work we consider the presence of ellipsoidal voids inside polycrystals submitted to large strain deformation. For this purpose, the originally incompressible viscoplastic selfconsistent (VPSC) formulation has been extended to deal with compressible polyaystals. Such an extended model allows us to account for porosity evolution in voided polycrystals, while preserving the anisotropy and crystallographic capabilities of the VPSC formulation. We present several applications of this extended VPSC model, which address the coupling between texture, plastic anisotropy, void shape, triaxiality, and porosity evolution. We also discuss the implementation of a multiscale calculation using the present compressible VPSC as constitutive routine inside dynamic FEM codes, for the simulation of deformation processes in which both anisotropy and cavitation became relevant aspects of microstructural evolution.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 977436
- Report Number(s):
- LA-UR-04-0551; LA-UR-04-551; TRN: US201009%%653
- Resource Relation:
- Journal Volume: 712; Conference: Submitted to: Numiform 2004
- Country of Publication:
- United States
- Language:
- English
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