This paper deals with experimental and numerical investigations into the impactor shape effects on the low velocity impact behavior of 3D woven composites. The samples were made of E-glass fibers and unsaturated polyester resin. Conical, hemispherical and flat-ended impactors were used. The damage modes and areas of the specimens are inspected using microscopic and optical images. The finite element package ABAQUS is used to simulate the impact event. The contact force, displacement and dissipated energy of different impactors are compared. A good agreement between experimental and numerical results is observed. The results show that the blunter impactors produce greater damage areas and threshold loads. However, the damage initiation time is not dependent to the impactor shape. Besides, the damage intensity of the composites is greatly influenced by the impactor shape and z-fibers volume fraction.

本文对3D编织复合材料的低速冲击行为中冲击器形状效应的实验和数值研究进行了研究。样品由电子玻璃纤维和不饱和聚酯树脂制成。使用圆锥形，半球形和平头冲击器。使用显微镜和光学图像检查样品的损坏模式和区域。有限元程序包ABAQUS用于模拟撞击事件。比较了不同冲击器的接触力，位移和耗散能量。观察到实验结果和数值结果之间的良好一致性。结果表明，钝头冲击器产生更大的破坏面积和阈值载荷。但是，损坏的开始时间不取决于冲击器的形状。除了，