Abstract
We present a fundamental investigation of the influence of material and structural parameters on the mechanics of fragmentation of brittle materials. First, we conduct a theoretical analysis (similar to Drugan’s single wave problem, Drugan, W.J. (2001), Journal of Mechanical and Physics Solids 49, 1181–1208.) and obtain closed form solutions for a problem coupling stress wave propagation and single cohesive crack growth. Expressions for a characteristic fragment size s 0 and a characteristic strain-rate \({\dot\varepsilon}_0\) are given. Next, we use a numerical approach to analyze a realistic fragmentation process that involves multiple crack interactions. The average fragment size s is calculated for a wide variety of strain-rates \({\dot \varepsilon}\) and a broad range of material parameters. Finally, we derive an empirical function that relates the normalized fragment size s/s 0 to the normalized strain-rate \({\dot \varepsilon}/\dot{\varepsilon}_0\) and that fits all of the numerical results with a single master curve.
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Zhou, F., Molinari, JF. & Ramesh, K.T. Effects of material properties on the fragmentation of brittle materials. Int J Fract 139, 169–196 (2006). https://doi.org/10.1007/s10704-006-7135-9
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DOI: https://doi.org/10.1007/s10704-006-7135-9