Kinematic Model of Penetration of Rigid Fragments into UHMWPE Laminates

doi:10.12382/bgxb.2022.0552

Abstract

Abstract: To reveal the interaction mechanism between the killing element and UHMWPE laminates, the ballistic test of cemented carbide fragments penetrating UHMWPE laminates was carried out. The residual velocity of the fragments after penetrating the laminates at different incident velocities and the fracture failure morphology of the laminates were obtained. Then based on the wave theory and energy conservation, the energy dissipation model of rigid fragments penetrating into the laminates was established, and the transfer laws of energy in different forms during fragment penetration were analyzed. It is found that the energy transfer caused by shear failure, and tensile and compression deformation of the laminates in the penetration process is dominant in various forms of dissipated energy. The comparison with the experimental results shows that the proposed model can effectively describe the penetration process of the fragment into the laminates, which can provide some insights into the killing mechanism of the protected target and trajectory design.

Key words: impactdynamics, penetration, UHMWPElaminates, energyconservation

CLC Number:

O346.5

DONG Fangdong, YANG Geng, WANG Shu, WANG Zhijun, FENG Zhiwei. Kinematic Model of Penetration of Rigid Fragments into UHMWPE Laminates[J]. Acta Armamentarii, 2022, 43(9): 2350-2359.

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