Abstract
Abstract In this paper, a new method is developed to investigate the anti-penetration performance of the steel/nylon sandwich plate, which incorporates experimental method with numerical simulation. Constitutive parameters of the steel/nylon sandwich plate are measured by the Hopkinson Pressure Bar, and LS-DYNA is applied to simulate the penetration process of projectiles into the sandwich plate. The dynamic response, failure modes and energy absorption coefficients are obtained, and the penetration tests are conducted to verify the numerical method. Results show: results obtained by experimental and numerical methods have very high agreement, which demonstrates that the method proposed can be applicable for predicting the anti-penetration performance of the sandwich plate.
Highlights
With the excellent performance of light-weight, high stiffness and high energy absorption capability, sandwich plates have been more and more widely used in protective structures recently
Constitutive parameters of the steel/nylon sandwich plate are measured by the Hopkinson Pressure Bar, and LS-DYNA is applied to simulate the penetration process of projectiles into the sandwich plate
W Goldsmith, et al [4] investigated the perforation damage behavior of the composite sandwich plate with the honeycomb core, which was impacted by spherical, cone and flat nose projectile, and the results demonstrated that the thickness of face-sheet played an important role in anti-penetration performance
Summary
With the excellent performance of light-weight, high stiffness and high energy absorption capability, sandwich plates have been more and more widely used in protective structures recently. F Yang, W J Niu, et al [14] used the LSDYNA to establish the finite element model of the sandwich plate, and investigated the influence of face-sheet and core thickness on the anti-penetration performance of the sandwich plate. E Carrera, S Valvano, et al [15] developed the advanced finite shell elements to establish the mesh model of composite laminated shell structures, and conducted the linear static stress analysis by the numerical method. N Zhao, R Ye, et al [20] took the sandwich plates with steel face-sheet and aluminum foam core as the research object, and investigated the penetration and deformation mechanism of sandwich plates under different penetration speeds by the experimental and numerical method. The anti-penetration performance of sandwich plates is investigated by the experimental method and the numerical simulation method, and the feasibility of the method proposed in this paper is to be verified by a comparison between numerical and experimental results
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