Modeling of Ceramic Microstructures: Dynamic Damage Initiation and Evolution
نویسندگان
چکیده
A model is presented for the dynamic finite element analysis of ceramic microstructures subjected to multi-axial dynamic loading. This model solves an initial-boundary value problem using a multi-body contact scheme integrated with interface elements to simulate microcracking at grain boundaries and subsequent large sliding, opening and closing of interfaces. A systematic and parametric study of the effect of interface element parameters, grain anisotropy, stochastic distribution of interface properties, grain size and grain morphology is carried out. Numerical results are shown in terms of microcrack patterns and evolution of crack density. The qualitative and quantitative results presented in this article are useful in developing more refined continuum theories of fracture properties of ceramics.
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