To develop a composite with high in-plane properties and sufficient delamination resistance, a quasi-three-dimensional (Q3D) woven composite has been designed. In Q3D, some yarns in each layer are woven into those in the adjacent layers and form a 3D interlocking network. This study examines the performance of a carbon fiber/SC-15 epoxy triaxial Q3D [(0°/60°/−60°)₄] composite. For comparison, a [0°/60°/−60°]₄ composite laminate with unidirectional (UD) plies and a [0°/60°/−60°]₄ laminate with two-dimensional woven (2DW) layers were fabricated using the same carbon fiber and epoxy system. The in-plane tensile, interlaminar fracture, and low-velocity impact tests were performed for all three types of composites. The results show that the Q3D composite has the in-plane tensile modulus and strength comparable to that of UD and 2DW composites, but offers a higher resistance to interlaminar crack propagation and impact damage. This work provides insights into the influences of fiber structures on composite properties and performances.

为了开发具有高的面内特性和足够的抗分层性的复合材料，已经设计了准三维（Q3D）编织复合材料。在Q3D中，每层中的一些纱线被编织成相邻层中的纱线，并形成3D互锁网络。这项研究检查了碳纤维/ SC-15环氧三轴Q3D [ （0°/ 60°/ −60°）₄ ]复合材料的性能。为了比较，[0°/ 60°/ - 60°] ₄具有单向（UD）帘布层和一[复合层压0°/ 60°/ -60° ] ₄使用相同的碳纤维和环氧树脂系统制作了具有二维编织（2DW）层的层压板。对所有三种类型的复合材料进行了面内拉伸，层间断裂和低速冲击测试。结果表明，Q3D复合材料具有与UD和2DW复合材料相当的面内拉伸模量和强度，但对层间裂纹扩展和冲击破坏具有更高的抵抗力。这项工作提供了对纤维结构对复合材料性能和性能影响的见解。