On probabilistic aspects in the dynamic degradation of ductile materials

Details On probabilistic aspects in the dynamic degradation of ductile materials On probabilistic aspects in the dynamic degradation of ductile materials

2009-10-27

arxiv.org/abs/0910.5109v1

Journal of the Mechanics and Physics of Solids 57 (12), 1980-1998 (2009)

Physics

Condensed Matter

Materials Science

28 pages, 13 figures, 3 tables

Scientific paper

10.1016/j.jmps.2009.07.001

Dynamic loadings produce high stress waves leading to the spallation of ductile materials such as aluminum, copper, magnesium or tantalum. The main mechanism used herein to explain the change of the number of cavities with the stress rate is nucleation inhibition, as induced by the growth of already nucleated cavities. The dependence of the spall strength and critical time with the loading rate is investigated in the framework of a probabilistic model. The present approach, which explains previous experimental findings on the strain-rate dependence of the spall strength, is applied to analyze experimental data on tantalum.

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