Abstract
Fracture behaviors of brittle polycrystalline solids such as ceramic materials are deeply related to microcracking. Continuum damage mechanics is considered a powerful theoretical framework to deal with brittle microcracking solids. However, it is fairly difficult to obtain analytically, as well as experimentally, evolution equations for microcracking and reduced elastic compliances of microcracked solids. In the present study, a mesoscopic simulation method at grain scale using a discontinuum mechanics model is employed to obtain such information. The validity and limitations of the isotropic theory of continuum damage mechanics are studied here.
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