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Description
Yuqi Zhang1 Alfonso Ngan1

1, The University of Hong Kong, Hong Kong, , Hong Kong

A dislocation-density dynamics framework for investigating the “intensive” structure with the resolution lower than the dislocation core is established, based on which the dislocation interaction inside the core can be explicitly taken into consideration and the desired core structure can be maintained. This framework is then implemented numerically by using the divergence preserving finite volume method in 2D. The highly flexible nature of the present framework is further verified by the simulations of various dislocation mechanisms, including the Frank-Read sources, the Orowan bowing, and the loop shrinkage and expansion. The results exhibit the detailed core structures during the dislocation evolutions and the continuity of dislocation densities is well reserved.

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