As the use of fiber-reinforced polymer composites grows in aerospace structures, there is an emerging need to implement damage tolerant approaches. The use of in-situ synchrotron X-ray tomography enables direct observations of progressive damage relative to the microstructural features, which are studied in a T650/5320 laminate composite with two layups via monotonic tension. Specifically, the interactions of micromechanical damage mechanisms at the notch tip were analyzed through 3D image processing as the crack grew. The analysis showed intralaminar cracking was dominant during crack initiation, delamination became prevalent during the later stages of crack progression, and fiber breakage was, in general, largely related to intralaminar cracking.

随着在航空航天结构中纤维增强聚合物复合材料的使用不断增长，迫切需要实施耐损伤的方法。使用原位同步加速器X射线断层扫描可以直接观察相对于微结构特征的渐进式损伤，这在具有两个铺层的T650 / 5320层压复合材料中通过单调张力进行了研究。具体而言，随着裂纹的扩展，通过3D图像处理分析了缺口尖端处的微机械损伤机制的相互作用。分析表明，层间裂纹在裂纹萌生过程中占主导地位，在裂纹发展的后期阶段分层变得普遍，并且纤维断裂通常与层内裂纹有关。