In the previous paper, the GN incompatibility is newly defined and a new annihilation term of a dislocation pair due to the dynamic recovery is introduced into an expression of dislocation density. Furthermore, a multiscale model of crystal plasticity is proposed by considering GN dislocation density and incompatibility. However, details of dislocation-crystal plasticity simulation are not given. In this paper, we explain a method of dislocation-crystal plasticity analysis. A finite element simulation is carried out for an f.c.c. single crystal under plane strain tension. It is numerically predicted that micro shear bands are formed at large strain, and sub-GNBs: small angle tilt boundaries are induced along these bands. Furthermore, the annihilation of dislocation pair and the increase of dislocation mean free path characterizing stage III of work-hardening are computationally predicted.
|Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
|Published - 2006 11月
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