玻璃布增强PC复合材料分层裂纹的扩展行为

In situ Study of Crack Propagation Behavior on the Interlaminar Fracture of Glass Fabric/PC Composite

利用光学显微镜原位研究在Ⅰ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及其微观机理．结果表明，分层损伤微裂纹易萌生在平行于裂纹扩展方向的纱线束和交织面内．在层板边缘，主裂纹可沿经纱的方向穿过经纱和纬纱的交织面向前扩展，造成织物分隔．随裂纹张开位移的增大，纬纱才回到原织物平面内．

The main objective of this study is to investigate the dynamic processes of the interlaminar fracture and micromechanisms of the glass woven fabric reinforced polycarbonate composites through in situ observation of specimen under mode Ⅰ loading by optical microscope.The results shown that the interlaminar microcrack is easy to initiate in thread end parallel to crack propagation direction and interweave face.The main crack advanced forward along direction of warp yarn to go through fabric interweave face,leading to the fabric separation.