中文摘要：

研究了低速冲击作用下复合材料结构破坏行为与冲击速度及材料属性间的关系．采用碰撞力分段模型和一阶剪切理论分析了给定初始速度的铁球与四边夹支的叠层复合材料板中心发生碰撞的动力学行为，包括碰撞力及表面沉陷随时间的变化规律；然后根据忽略厚度的界面模型假设及简化的Tsai-Wu张量破坏准则对叠层复合材料板的解层破坏进行了计算和分析．结果表明最大碰撞力与初始碰撞速度成正比，夹支矩形叠层复合材料板的解层破坏区域最先出现在应力幅值较大的中轴线及边界附近，并随初始碰撞速度的增大而扩展并改变几何形状．

英文摘要：

The anti-damage performance of composite structures under impact attracts much attention. The relations between damage behaviors and impact velocity as well as material properties were studied under the low velocity impact. By adopting a piecewise impact force model and the First Shearing Deformation Theory （FSDT）, the dynamic behavior, including the evolution rules of impact force and surface dent, of composite laminates with clamped boundary under low velocity impact of a steel bali in the center was analyzed. And the delamination area of the laminates was calculated and analyzed by adopting hypothesis of no thickness interface with simplified version of Tsai-Wu＇s Damage Criteria. The results have shown that the maximum impact force is in proportion to the initial impact velocity. The Delamination areas first appear near the axes and the boundaries of rectangular composite laminates with clamped boundary, and they expand and vary their shapes with the increase of impact velocity.