陶瓷/泡沫铝/铝合金复合装甲抗射流侵彻性能

为研究泡沫铝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。从不同泡沫铝夹芯厚度、相同厚度复合装甲下不同前后板厚度及布置方式和复合装甲倾角三方面研究了该复合装甲能量吸收规律、射流头部剩余速度以及不同倾角下装甲的防护性能。结果表明,泡沫铝作为夹芯层可充分降低复合装甲背板质点速度。同一倾角θ下,随着泡沫铝厚度的增大,复合装甲背板质点速度减小。泡沫铝厚度为2.4 mm时,射流头部剩余速度最低,复合装甲能量吸收最多,抗侵彻性能最优。同一泡沫铝厚度下,随着t_1/t_2值的增大,接触式复合装甲与间隔式复合装甲的射流头部剩余速度均先降低后增加。t_1/t_2=1时,间隔式复合装甲的抗侵彻性能最优。当仅布置方式不同时,间隔式与接触式复合装甲抗射流侵彻性能的差别较小。随着倾角θ的增大,复合装甲的防护性能先增强后降低。倾角为20°时,复合装甲抗射流侵彻性能最优。

Anti-jet Penetration Performances of the Ceramic/Aluminum Foam/Aluminum Alloy Composite Armor

To study the anti-penetration performance of composite armor with aluminum foam,based on the stress-wave propagation characteristics,a theorytical analysis of the structure of ceramic/aluminum foam/aluminum alloy composite armor was carried out.The energy absorption rule,residual velocity of jet head,and protective capability of armor under different dip angle were investigated from three aspects of different aluminum foam sandwich thickness,different thickness and arrangement way of frontback plate under the composite armor with same thickness,and composite armor dip angle.Results show that the aluminum foam as sandwich layer can reduce the particle velocity of back plate of composite armor adequately.Under the same dip angle θ,the particle velocity of back plate decreases with increasing thickness of aluminum foam.When the thickness of foam aluminum is 2.4 mm,the residual velocity of the jet head is minimum,the energy of the composite armor is maximum and the anti-penetration performance is optimal.Under the same thickness of aluminum foam,with increasing the thickness ratio t1/t2,the residual velocity of jet head of the interval and contact type composite armor decreases firstly,and then increases.When t1/t2 =1,the anti-pene-tration performance of interval type composite armor is optimal.When the layout way is not the same only,the difference of penetration performance between interval and contact type composite armor is small.With increasing the dip angle θ,the protective capability of composite armor increases firstly,and then decreases.When the dip angle θ is 20°,the anti-jet penetration performance of composite armor is optimal.