聚脲/陶瓷复合板抗平头弹冲击性能的FEM–SPH耦合模拟

Coupled FEM–SPH Simulation for Impact Resistance of Polyurea/Ceramic Composite Plates Against Blunt Projectiles

采用有限元法–光滑粒子流体动力学(FEM–SPH)耦合方法,通过数值模拟研究了聚脲/陶瓷复合板在平头弹高速撞击下的抗冲击性能。考虑了聚脲层与陶瓷层的不同配置型式和结合状况,计算得到针对不同结构的复合板的弹体剩余速度,分析了弹体和靶板的变形。结果表明,在相同面密度的情况下,抗冲击性能最佳的是陶瓷背面布置聚脲的复合板(C2型),其次是正面和背面布置等厚度聚脲的三明治复合板(C3型),最后是陶瓷正面布置聚脲的复合板(C1型),前两种聚脲/陶瓷复合板的抗冲击性能优于相同面密度的纯陶瓷板;同时,对于C2型和C3型复合板,聚脲层与陶瓷层粘结比层叠的抗冲击性能更好;另外,发现在一定范围内增大聚脲层厚度能增强C2型和C3型复合板的抗冲击性能。

The impact resistance of polyurea/ceramic composite plates under high velocity impact of a blunt projectile was numerically studied with FEM SPH coupled method.Different con gurations and bonding conditions of polyurea layer and ceramic layer were considered.The residual velocity of the projectile was obtained for composite plates of different structures,and deforma-tions of the projectile and target plate were analyzed.The results show that under the condition of the same areal density,the com-posite plate consisting of a ceramic layer and a backing polyurea layer(con guration C2)has the best impact resistance,the sand-wich composite plate placing a ceramic layer between backing and covering polyurea layers(con guration C3)has the second best impact resistance,and the composite plate consisting of a ceramic layer and a covering polyurea layer(con guration C1)shows the worst impact resistance among the three kinds of composite plate.The impact resistance of the rst two polyurea/ceramic composite plates is better than that of the pure ceramic plate with the same areal density.Also,the cohesion of polyurea layer and ceramic layer results in a better impact resistance for composite plates of con gurations C2 and C3,compared with the stacking of them.In addi-tion,it is found that the impact resistance of C2 and C3 composite plate is enhanced with the increase of polyurea layer’s thickness in a certain range.