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- W2945622475 abstract "We consider a mesoscale continuum model for the evolution of dislocation density in small-strain crystal plasticity. The model is based on the continuum dislocation dynamics theory and extended by a formulation for impenetrable grain boundaries. We introduce a fully coupled numerical method combining a conforming finite element approximation of elasto-plasticity with an implicit Runge-Kutta discontinuous Galerkin discretization of the dislocation microstructure which allows for 3d computations including multiple slip systems and dislocation interaction. In addition, a numerical representation of grain boundaries impenetrable to dislocation flux is considered within this framework. The formulation is applied to a tricrystal focusing on the analysis of dislocation stress interaction between different grains. The results are compared to discrete dislocation dynamics data from the literature." @default.
- W2945622475 created "2019-05-29" @default.
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- W2945622475 date "2019-09-01" @default.
- W2945622475 modified "2023-10-14" @default.
- W2945622475 title "A mesoscale continuum approach of dislocation dynamics and the approximation by a Runge-Kutta discontinuous Galerkin method" @default.
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- W2945622475 doi "https://doi.org/10.1016/j.ijplas.2019.05.003" @default.
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