Summary
A general approach to the problem of determination of elastoplastic behavior of metallic polycrystals at finite deformation is presented. The relation between moving dislocation density and global slip rate for grains is developed. Transition to grain response is obtained by introducing the hardening matrix. Field equations for heterogeneous elastoplastic metals are transformed into an integral equation, using Green functions technique. This allows to find the spin of the lattice related to texture formation.
Scale transition is achieved by a self-consistent approximation of the integral equation. New results concerning BCC metals (sheet steel) are presented. They apply to tensile test, Lankford coefficient, initial and subsequent yield surfaces, and evolution of the internal state of the polycrystal: second-order residual stress, stored energy and texture evolution.
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Lipinski, P., Berveiller, M., Reubrez, E. et al. Transition theories of elastic-plastic deformation of metallic polycrystals. Arch. Appl. Mech. 65, 291–311 (1995). https://doi.org/10.1007/BF00789222
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DOI: https://doi.org/10.1007/BF00789222