Shear deformation at high strain-rates was modelled within the framework of discrete dislocation plasticity. The question of whether dislocation acceleration could be ignored at high strain-rates was considered. The use of high-velocity stress and displacement fields was studied. Simulations took place in a computational cell, which represented Al or Cu, which was sheared at a strain-rate of 106/s. The calculations showed that inertial effects could not be neglected. Although the high-velocity stress and displacement fields yielded significant differences locally, with respect to their quasi-static equivalents, their effect upon the overall stress-strain curve was negligible.

High-Speed Dislocations in High Strain-Rate Deformation. A.Roos, J.T.M.De Hosson, E.Van der Giessen: Computational Materials Science, 2001, 20[1], 19-27