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Based on Held's critical initiation criterion of high speed fragment impacting the bare charge, the model for calculating critical initiation speed was proposed for the shelled explosive, the LS-DYNA method was used to simulate the initiation process of shelled explosive impacted by fragment. The results show that, the error of numerical simulation and theoretical calculation was very small, which...
It is interesting and important for researchers to understand the damage process in order to reliably predict fragment distribution of concrete material under blast loading. In the present study, a mesoscale concrete model is developed to simulate the dynamic failure process of a concrete slab under contact detonation. In the mesoscale model, the concrete material is assumed to consist of two phases,...
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