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Department of Engineering
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An occasional cross-disciplinary seminar series
(Information and directions for visitors)
Abstracts
Flow localization and damage in metals under high strain rate
conditions
Professor Alain Molinari
Institut Supérieur de Génie Mécanique et Productique, Université de Metz
When metals are subjected to high rates of straining, dynamic damage events are observed such as multiple necking/fragmentation, adiabatic shearing or spalling. These events are initiated by plastic flow instabilities and bifurcation phenomena. The analysis of dynamic damage is a key feature to understand ductile fracture in fast deformation processes. By considering different examples, it is shown by analytical means how material properties and loading conditions influence the onset and the development of dynamic damage. A special attention is accorded to the analysis of inertia effects which are significant at high loading rates. Universal trends concerning the effects of inertia and loading rates on damage patterning are emphasized.
