复合材料层合板的抗弹性能模拟分析

Numerical Simulation of the Anti-Bullet Property for Composite Laminated Plates

采用有限元软件ABAQUS模拟圆锥头弹体正冲击纤维增强复合材料层合板,分析了不同层数层合板在不同冲击速度下,子弹初始速度和剩余速度的关系以及层合板的等效应力云图和破坏特征云图。结果表明:在保持单层板厚度不变时,增大层合板层数可显著增强层合板的抗弹性能;子弹的剩余速度与初始速度关系曲线变化特征为先突变后平缓变化再呈线性关系;层合板的等效应力的最大值由接触点扩展到四周固定边界,最后到击穿区域周围局部单元;复合材料层合板在高速冲击下直接发生剪切破坏,而在低速冲击下先达到一定挠度然后发生破坏,为纤维拉伸破坏。

The finite element software ABAQUS is used to simulate the impact of fiber reinforced composite laminated plates. Equivalent stress nephogram of laminated plates with different layers, failure characteristics of laminated plates and bullet velocity diagram are analyzed at different speeds. The results show thickness of laminates can significantly affect the elastic properties of composite laminated plates. The characters of relationship between the residual velocity and the initial velocity for bullets are the first sudden change,and then have gentle change and have linear relation finally. When the composite laminated plates is under the bullet impact,the maximum value of the equivalent stress carry from the contact point to the fixed boundary around,and then spread to the local element around the breakdown area. The composite laminated plates are directly destroyed of shear failure under high velocity impact; the failure of composite laminated plates under low velocity impact is the tensile failure.