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A dynamic discrete dislocation plasticity study of plastic relaxation phenomena in shock loading

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Dynamic Discrete Dislocation Plasticity (D3P) simulates plasticity as a result of the collective motion of individual dislocations. Dislocations are modelled as discontinuities in a elastodynamic continuum, so unlike traditional discrete dislocation methods, time is included as a true field variable, and dislocations are described as sources of elastodynamic wavelets emanating from their cores. This introduces a new dimension to the classical study of dislocation-mediated phenomena. By studying the collective response of the dislocations in shocked systems under varied boundary conditions we are able to study in detail the effect dislocations have on phenomena ranging from the elastic precursor’s decay to plastic shielding of dynamic crack tips.

This talk is part of the Surfaces, Microstructure and Fracture Group series.

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