陶瓷/泡沫铝/铝合金抗线性射流侵彻性能分析及结构优化

为探讨新型复合装甲抗侵彻性能,根据应力波传播特性对陶瓷/泡沫铝/铝合金复合结构进行了理论分析,并从不同组合的面、背板厚度比和泡沫铝夹芯厚度两方面,研究了该复合装甲能量吸收规律、应力波衰减规律。结果表明:同一厚度比下,随着泡沫铝厚度的增大,复合装甲背板质点速度与应力波峰值都呈负指数规律减小;同一泡沫铝厚度下,厚度比增大时,泡沫铝及装甲结构吸收的能量先增加后减小,泡沫铝厚度为2.4 mm、厚度比为1.25时,复合装甲结构抗射流侵彻性能最好。

Analysis of Resisting to the Linear Jet Penetration of the Ceramic/Aluminum Foam/Aluminum Alloy and Structure Optimization

In order to discuss new composite armor resisting to the shaped charge jet penetration, the theory of stress-wave propagation property was used to analyze the armor construction (ceramic/aluminum foam/aluminum alloy) theoretically. The energy absorption rule, stress-wave attenuation rule, were investigated at the different combinations of front-back plate thickness ratios K and aluminum foam sandwich thickness. Results show that within the same thickness ratio K, when the thickness of aluminum foam is increased, the particle velocity of back plate and stress-wave peak value of composite armor decrease by negative exponent rule. Within the same thickness of aluminum foam, when the thickness ratio K is increased, the absorbed energy of aluminum foam and armor structure increase firstly, and then decrease. It shows that the aluminum foam thickness with 2.4 mm and 1.25 thickness ratio can give the best resistance performance for composite armor structure to the shaped charge jet penetration.