Protective Properties of Porous Foam Aluminum Sandwich Composite Plate under the Combined Action of Fragment and ShockWave

doi:10.3969/j.issn.1000-1093.2021.05.017

Abstract

Abstract: The porous foam aluminum alloy plate not only overcomes the shortcomings of the traditional protective structure such as heavy weight and inconvenient transportation, but also has the advantages of fatigue resistance and high specific strength. The lightweight and efficient anti-explosion protection materials are of great significance. The finite element analysis software LS-DYNA is used to numerically simulate the failure mode and protection performance of the sandwich composite plate under the combined action of shock wave and fragment, and analyze the effect of the foam aluminum sandwich structure on the deformation of the backboard under different arrangements. The results show that, at a detonation distance of 40 cm, the fragments will act on the target plate before the shock wave, and the fragment load strength is far greater than the shock wave load strength. When the arrangement of foam aluminum and fiber is “1 mm-thick aluminum alloy panel +10 mm-thick foam aluminum +10 mm-thick foam aluminum +10 mm-thick fiber +1 mm-thick aluminum alloy backplane”, the deformation displacement of the backboard is the smallest, and the total internal energy of the structure is the highest, which are 13.9 mm and 52.7 kJ, respectively. The overall deformation degree of the structure can be more effectively reduced and the energy generated by the panel deformation is absorbed under the working condition.

Key words: sandwichcompositestructure, fragmentshockwavecoupling, protectionperformance, damagemechanism, numericalsimulation

CLC Number:

O383⁺.3

WANG Mengxin， CHEN Ruiying， WANG Jinxiang. Protective Properties of Porous Foam Aluminum Sandwich Composite Plate under the Combined Action of Fragment and ShockWave[J]. Acta Armamentarii, 2021, 42(5): 1041-1052.

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第42卷第5期2021 年5月
兵工学报ACTA ARMAMENTARII
Vol.42No.5May2021

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