Abstract
It is of practical importance to establish the relationship between intensity andtoughness parameters and porosity of porous materials. This is of benefit not onlyto the development of powder metallurgy but to the damage mechanics theoryas well. Porous materials can be separated into two types according to the properties ofvoids distribution, i.e. the simple porous materials and the complicated porous materi-als. The voids for the former are completely random in shape, size, and distribution,and therefore, these porous materials are homogenous and isotropic in macroscopicscale from the statistical viewpoint. Conversely, the voids for the latter are not ran-
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