Observing progressive damage in carbon fiber epoxy laminate composites via 3D in-situ X-ray tomography
Observing progressive damage in carbon fiber epoxy laminate composites via 3D in-situ X-ray tomography
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DOI：
10.1016/j.engfracmech.2021.107626
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发表时间：
2021-03-03
影响因子：
5.4
通讯作者：
Sangid, Michael D.
中科院分区：
文献类型：
--
作者：
Ortiz-Morales, Alejandra M.;Hanhan, Imad;Sangid, Michael D.
随着纤维增强聚合物复合材料的使用在航空航天结构中生长，因此有必要实施耐受的方法。原位同步加速器X射线断层扫描的使用可以直接观察到相对于微观结构特征进行渐进损伤，这些特征在T650/5320层压板复合材料中进行了研究，并通过单调张力进行了两个上层。具体而言，随着裂纹的增长，通过3D图像处理分析了Notch尖端上微机械损伤机制的相互作用。分析表明，在裂纹开始期间，层内裂纹在裂纹过程中占主导地位，在裂纹进展的后期阶段，分层变得普遍，并且纤维断裂通常与层内裂纹基本相关。
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.