Computer estimation of plastic strain localization and failure for large strain rates using viscoplasticity

摘要: The problem of modelling extreme dynamic events for metallic materials including strain rates over 107 s-1 and temperatures reaching melting point is still vivid in theoretical, applied computational mechanics. Such thermomechanical processes are highly influenced by elasto-viscoplastic wave effects (their propagation interaction) varying initial anisotropy caused existing defects metals structure like microcracks, microvoids, mobile immobile dislocations densities being together a cause overall induced during deformation (from the view meso-macro continuum mechanics approach). It should be emphasised, that most reliable way estimation such needs nowadays complex phenomenological models due to limitations current experimental techniques (it not possible measure evolution crucial quantities e.g. temperature processes) capabilities.