Damage characteristics of aluminum alloy triangular corrugated sandwich plate against flat headed bullet impact

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (3) : 179-188.

REN Guanghui1, ZHAO Xin2, DENG Yunfei2, YANG Xiaoyue2

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Abstract

In order to study the impact performance and damage characteristics of aluminum alloy triangular corrugated sandwich plates against blunt-nosed projectile, the impact test on the aluminum alloy triangular corrugated sandwich plates was carried out with the one-stage gas gun system. According to the test data, the ballistic limit velocity and energy consumption of triangular corrugated sandwich plate and monolithic plate are analyzed, and the dynamic damage process, dynamic load response and damage mechanism are analyzed combined with finite simulation. The results show that the damage modes of triangular corrugated sandwich plate are shear failure, tear failure and bending deformation. The impact resistance of the corrugated plate is lower than that of the monolithic plate, and the impact resistance of the corrugated plate at node position is higher than the base position. At low impact velocities, the energy dissipation of the corrugated plate is lower than that of monolithic plate. As the impact velocity increases, the energy dissipation at the node position of the corrugated plate is higher than that of the monolithic plate, and the energy dissipation at the base position is similar to that of the monolithic plate. In addition, the dynamic load response and the failure mechanism of the corrugated plate are affected by the impact position.

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corrugated sandwich plate / failure mode / ballistic limit velocity / impact

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REN Guanghui1, ZHAO Xin2, DENG Yunfei2, YANG Xiaoyue2. Damage characteristics of aluminum alloy triangular corrugated sandwich plate against flat headed bullet impact[J]. Journal of Vibration and Shock, 2024, 43(3): 179-188

References

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