Dislocation and twin mediated high strain rate deformation of single crystal beta-HMX
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We use a dislocation density-based crystal plasticity model, called DiscoFlux, to model high strain rate deformation of single crystal β-HMX. The DiscoFlux model incorporates microstructural mechanisms such as dislocation creation, annihilation, trapping, and transport within and across grains. The model has been shown to work across a range of temperatures and strain rates. In this work, we modify the original DiscoFlux model to incorporate twinning and slip within twinned regions. We compare our simulations to existing experimental observations. Our results show that dislocation transport, twinning, and slip within twinned regions improve the predictions of overall deformation behavior of β-HMX.
