利用 SEM和光学显微镜 ,原位观察在 型动态加载下玻璃布增强 PC复合材料层板的分层断裂过程。结果表明 , 型加载下 ,织物增强复合材料分层裂纹扩展方向随织物结构变化造成分层在正应力和剪应力共同作用下进行 ,分层微裂纹的萌生主要在交织面或垂直于裂纹扩展方向的纱线束内以纤维的分离和脱粘进行 ,主裂纹的扩展易于沿平行于裂纹扩展方向的纱线束以纤维的脱粘、断裂和界面脱粘进行 Using SEM and optical microscope, in-situ observation of the glass fiber cloth under the dynamic loading condition enhanced the PC layer delamination process. The results show that under the condition of type loading, the propagation direction of delamination crack in fabric reinforced composite material changes with the change of fabric structure under the combined effect of normal stress and shear stress. The initiation of delaminated microcracks mainly occurs at the interlaced surface or perpendicular to the crack propagation direction Of the yarn bundles are separated and debonded by the fibers, and the expansion of the main cracks tends to occur along the yarn bundles parallel to the direction of crack propagation with the debonding, breaking and debonding of the fibers