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Combustion that follows a gas explosion quickly evolves into detonation and causes severe damage in thin-walled structures, especially structures that contain small internal flaws. Detonation-driven fracture of thin structures is studied numerically by a 3D meshfree method. Such scenarios are studied through numerical analysis and compared to experimental data.

We present a meshfree approach to model dynamic fracture in thin structures. Material failure is modeled based on a stress-based criterion and viscoplastic is used to describe the material behavior in the bulk material. Material fracture is simply modeled by breaking bonds between neighboring particles. The method is applied to fracture of cylindrical thin structures under explosive loading. The loading is modelled by a pressure-time history. Comparisons between the computational results and experimental data illustrate the validity and robustness of the proposed method.