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为了研究含冲击损伤复合材料层压板的压缩破坏机制,通过前后表面超声C扫描获得分层损伤在层压板内的分布情况,使用应变片获取层压板两面的应变场,采用声发射观察层压板压缩破坏过程。研究发现:冲击分层损伤在厚度方向上的非对称分布引起层压板内部出现严重的应力集中,致使纤维断裂并最终导致层压板整体破坏;导致含冲击损伤层压板压缩破坏的主要原因为纤维断裂而非分层扩展。
In order to study the mechanism of compressive failure of composite laminates with impact damage, the distribution of delamination damage in the laminates was obtained by C-scan of the front and back surfaces. Strain gages were used to obtain the strain field of both sides of the laminates. Destruction process. It is found that the asymmetric distribution of the impact delamination damage in the thickness direction causes serious stress concentration inside the laminate, resulting in the fiber fracture and eventually the overall failure of the laminate. The main reason for the compression failure of the impact damage laminate is the fiber fracture Instead of hierarchical expansion.