On the dynamic behavior of porous ductile solids containing spheroidal voids

Influence of inertial and thermal effects on the dynamic growth of voids in porous ductile materials

The influence of inertial, thermal and rate sensitive effects on the void growth at high strain rate in a thermal viscoplastic solid is investigated by means of a theoretical model presented in the present paper. Numerical analysis of the model suggests that inertial, thermal and rate sensitive effects are three major factors which greatly influence the behavior of void growth in the high strai...

Ductile damage of porous materials with two populations of voids

This study is devoted to the modelling of ductile damage in uranium dioxide. This polycrystalline material contains two populations of voids of well separated size. The problem addressed here is the prediction of the effective flow surface of a Gurson material containing randomly oriented oblate voids. The case of spherical voids is considered first and the variational approach of Gurson is gen...

Partial Discharges in Ellipsoidal and Spheroidal Voids

Transients associated with partial discharges in voids can be described in terms of the charges induced on the terminal electrodes of the system. The relationship between the induced charge and the properties which are usually measured is discussed. The method is illustrated by applying it to a spheroidal void located in a simple disk-type GIS spacer. I N T R O D U C T I O N HE transients which...

Bifurcated Mechanical Behavior of Deformed Periodic Porous Solids

The transformation of periodic microporous structures fabricated by interference lithography followed by their freezing below glass transition is described. Periodic porous microstructures subjected to internal compressive stresses can undergo sudden structural transformation at a critical strain. The pattern transformation of collapsed pores is caused by the stresses originated during the poly...

A Note on the “Simulation of Gas Diffusion in Capillaries and Porous Solids”