INFLUENCE OF FLOW RULE AND INERTIA ON VOID GROWTH IN A RATE SENSITIVE MATERIAL

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Abstract
The growth and deformation of a spheroidal void in an infinite viscous matrix is addressed. In the case of a linearly viscous (newtonian) matrix (c = ke), an exact solution is obtained. On the basis of this solution the case of a power law viscoplastic matrix (o = ke ) is dealt with by a variational approach. Finally, the Galerkine method is used to take into account inertia effects. This work shows the anisotropy of damage and the stabilizing effect of the remote strain rate e for a material exhibiting the linear flow rule o" = o"0 +(3e as well as the stabilizing effect of the inertia forces.

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