MODEL OF ANISOTROPIC MICROMECHANICAL DAMAGE APPLIED TO CERAMICS

This paper deals with an anisotropic modelisation of ceramic damage un der dynamic loading. It's a generalisation of Rajendran's micromechani cal model. The damage is represented by three orthogonal cracks system s, allowing the loading - induced anisotropy to be taken into account. A nucleation and a growth kinetic law, implying material pulverisatio n, are adjusted to a new statistical microcrack description. The model is implanted in the code DYNA3D and applied with success to the simul ation of compressive Hopkinson's Bar Tests.