采用树脂传递塑膜工艺制备碳纤维二维三轴编织复合材料，分别通过空气炮系统和落锤冲击实验系统开展了二维三轴编织复合材料在不同冲击能量下的高、低速冲击实验，并通过超声C扫描获取了不同冲击能量下的分层损伤情况，分析了二维三轴编织复合材料的高、低速冲击响应及损伤失效特性。然后，对低速冲击试样开展压缩实验，结合数字图像同步测试技术，阐明了不同冲击能量下二维三轴编织复合材料的冲击后压缩性能。结果表明，在低速冲击载荷下，随着冲击能量的增加，二维三轴编织复合材料的损伤面积等比例增大，但能量吸收增大了近2倍，在6.7 J/mm的冲击能量下，材料内部产生严重的损伤，导致其剩余强度大幅下降。二维三轴编织复合材料的弹道极限速度约为138.5 m/s，当弹体入射速度大于弹道极限速度时，其损伤面积随弹体入射速度的增大而降低。

The two-dimensional triaxially braided composites are prepared by the resin transfer molding process. The mechanical response of two-dimensional triaxially braided composite under high and low velocity impact are investigated through the air gun system and drop hammer impact test system with different energies. The delamination damage under different impact energies are obtained by ultrasonic C-scan to analyze the damaged failure characteristics. The behaviors of compression after impact are studied in combination with digital image correlation. It is shown that the damaged area of the two-dimensional triaxially braided composite increases proportionally with the low velocity impact energy， but the energy absorption increases almost 2 times. Severe damage occurs and extends along the axial fiber under impact with an energy of 6.7 J/mm， leading to a significant reduction in its residual strength. The ballistic limit velocity of the two-dimensional triaxial braided composite is about 138.5 m/s. The projectile is embedded in the plate. When the impact velocity is greater than the ballistic limit velocity， a rectangular hole is formed on the impact surface， and a tearing fracture can be observed on the back surface. The damage area decreases with the increase of the incident velocity.