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A damage model for the dynamic fragmentation of brittle solids. (English) Zbl 0984.74073

Summary: Impact produces high stress waves leading to the degradation of brittle materials such as ceramics. Here, based on a probabilistic approach, we examine single and multiple fragmentation. The deterministic nature of numerical simulations is discussed with respect to stress rate and volume, and a damage model is proposed to account for dynamic loadings. Characteristic parameters are used to choose the mesh size. The mesh sensitivity is studied on a spalling configuration, and numerical predictions are compared with experimental data obtained on edge-on-impact configurations.

MSC:

74R15 High-velocity fracture
74M20 Impact in solid mechanics
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