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- W2063373019 abstract "This work aims at the formulation of a gradient crystal plasticity model which incorporates some of the latest developments in continuum dislocation theory and is, at the same time, well-suited for a three-dimensional numerical implementation. Specifically, a classical continuum crystal plasticity framework is extended by taking into account continuous dislocation density and curvature field variables which evolve according to partial differential equations (Hochrainer et al., 2014; Ebrahimi et al., 2014). These account for dislocation transport and curvature-induced line-length production and have been derived from a higher-dimensional continuum dislocation theory. The dislocation density information is used to model work hardening as a consequence of dislocation entanglement. A composite microstructure is simulated consisting of a soft elasto-plastic matrix and hard elastic inclusions. The particles are assumed to act as obstacles to dislocation motion, leading to pile-ups forming at the matrix–inclusion interface. This effect is modeled using gradient plasticity with a simplified equivalent plastic strain gradient approach (Wulfinghoff et al., 2013) which is used here in order to allow for an efficient numerical treatment of the three-dimensional numerical model. A regularized logarithmic energy is applied which is intended to approximate the higher order gradient stress of the statistical theory of Groma et al. (2003)." @default.
- W2063373019 created "2016-06-24" @default.
- W2063373019 creator A5021182604 @default.
- W2063373019 creator A5025495302 @default.
- W2063373019 date "2015-06-01" @default.
- W2063373019 modified "2023-10-17" @default.
- W2063373019 title "Gradient crystal plasticity including dislocation-based work-hardening and dislocation transport" @default.
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- W2063373019 doi "https://doi.org/10.1016/j.ijplas.2014.12.003" @default.
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