CHEN Zhipeng, MA Fulin, YANG Nana, YAO Xiongliang, JU Jinlong. Peridynamic damage simulation of composite structures subjected to fragment clusters[J]. Explosion And Shock Waves, 2022, 42(3): 033303. doi: 10.11883/bzycj-2021-0081
Citation:
CHEN Zhipeng, MA Fulin, YANG Nana, YAO Xiongliang, JU Jinlong. Peridynamic damage simulation of composite structures subjected to fragment clusters[J]. Explosion And Shock Waves, 2022, 42(3): 033303. doi: 10.11883/bzycj-2021-0081
CHEN Zhipeng, MA Fulin, YANG Nana, YAO Xiongliang, JU Jinlong. Peridynamic damage simulation of composite structures subjected to fragment clusters[J]. Explosion And Shock Waves, 2022, 42(3): 033303. doi: 10.11883/bzycj-2021-0081
Citation:
CHEN Zhipeng, MA Fulin, YANG Nana, YAO Xiongliang, JU Jinlong. Peridynamic damage simulation of composite structures subjected to fragment clusters[J]. Explosion And Shock Waves, 2022, 42(3): 033303. doi: 10.11883/bzycj-2021-0081
In recent years, as a hot area of computational mechanics, peridynamic has attracted the attention of researchers. The peridynamic theory attempts to unify the mathematical models of continuum, cracks, and particles into one framework, which 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, this method has a great advantage in dealing with discontinuity problems, such as crack propagation and other fracture problems. In this paper, the peridynamic method was used to study the damage characteristics of composite structures under the impact of a fragment group and to analyze the enhancement effect on the penetration ability during the destruction process. Through a self-programmed peridynamic model, the penetration process of a fragment group into a composite laminate was simulated to explore the influence of the fragment velocity, fragment number and fragment spacing on the penetration ability enhancement. The results show that the damage modes of the laminate structure under the action of high-velocity fragment group penetration are diverse and related to the number, velocity and spacing of the fragments. The increase in the fragment number has a significant effect on the penetration ability of the fragments. The fragment spacing is negatively correlated with the enhancement effect. When the fragment spacing decreases, the damage effect increases. The fragment velocity directly determines the penetration time, and the increase in the fragment velocity decreases the penetration time. The superimposition effect of the stress waves is not enough to affect the penetration ability of the fragment group.
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