MA Fulin, YANG Nana, ZHAO Tianyou, CHEN Zhipeng, YAO Xiongliang. Peridynamic damage simulation of ship composite structures subjected to combined action of shock wave and fragments[J]. Explosion And Shock Waves, 2022, 42(3): 033304. doi: 10.11883/bzycj-2021-0080
Citation:
MA Fulin, YANG Nana, ZHAO Tianyou, CHEN Zhipeng, YAO Xiongliang. Peridynamic damage simulation of ship composite structures subjected to combined action of shock wave and fragments[J]. Explosion And Shock Waves, 2022, 42(3): 033304. doi: 10.11883/bzycj-2021-0080
MA Fulin, YANG Nana, ZHAO Tianyou, CHEN Zhipeng, YAO Xiongliang. Peridynamic damage simulation of ship composite structures subjected to combined action of shock wave and fragments[J]. Explosion And Shock Waves, 2022, 42(3): 033304. doi: 10.11883/bzycj-2021-0080
Citation:
MA Fulin, YANG Nana, ZHAO Tianyou, CHEN Zhipeng, YAO Xiongliang. Peridynamic damage simulation of ship composite structures subjected to combined action of shock wave and fragments[J]. Explosion And Shock Waves, 2022, 42(3): 033304. doi: 10.11883/bzycj-2021-0080
In recent years, as a hot area of computational mechanics, an emerging meshless method, namely peridynamic, has attracted the attention of researchers. The peridynamic theory attempts to unify the mathematical models of continuum, cracks, and particles into one framework, so it is essentially a mechanical model independent of the scope of continuum mechanics. The governing equation of peridynamic adopts the spatial integral form, and the continuity of the field function is no longer required. Compared with the traditional methods based on continuum mechanics, the peridynamic method has a great advantage in dealing with discontinuity problems, such as crack propagation and other fracture problems. In this paper, the peridynamic method is adopted to study the damage characteristics of composite structure under the combined action of shock wave and fragment group. The damage mode of the laminated plate and reinforced plate structures are analyzed, and the influence of the load sequence and other factors on the damage ability is considered. The results show that the damage degree of the composite structure under the combined action is mainly related to the shock wave strength, the penetration ability of the fragment group, and the order of action. The main damage modes are delamination failure, matrix damage, shear damage and large structural deformation. When the shock wave acts first, the structural damage is serious and the damage range is larger. The ribs of the reinforced plate significantly reduce the impact of the shock wave action, and then affect the joint action, hence its deformation, displacement and structural damage are greatly reduced compared to the laminates, the damage is more serious when fragment group acting first.
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