The effect of mode II fatigue crack growth rate on the fractographic features of CFRP composite laminates: An acoustic emission and scanning electron microscopy analysis
The effect of mode II fatigue crack growth rate on the fractographic features of CFRP composite laminates: An acoustic emission and scanning electron microscopy analysis
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II 型疲劳裂纹扩展速率对 CFRP 复合材料层合板断口特征的影响：声发射和扫描电子显微镜分析
DOI：
10.1016/j.engfracmech.2020.107408
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发表时间：
2020
影响因子：
5.4
通讯作者：
D. Zarouchas
中科院分区：
文献类型：
--
作者：
R. Mohammadi;M. A. Najafabadi;H. Saghafi;M. Saeedifar;D. Zarouchas
本研究的重点是表征 II 型负载条件下碳/环氧树脂层压板的疲劳损伤特征。为此，对端部缺口弯曲 (ENF) 样本施加正弦循环载荷，并研究样本的疲劳行为。使用扫描电子显微镜 (SEM) 来识别断裂表面的损伤特征，即纤维印记、尖点、滚轴尖点和条纹。结果发现，尖点和条纹等疲劳损伤特征完全取决于疲劳裂纹扩展速率da/dN。此外，建立了疲劳条纹空间与应变能释放率范围（ΔGs）和磁滞回线面积之间的线性关系。声发射（AE）方法也被用来表征损伤特征。获得的结果表明，较高的声发射能量表明较大且较粗糙的尖点和条纹特征。
The present study is focused on the characterization of the fatigue damage features in carbon/epoxy laminates under mode-II loading conditions. To this aim, a sinusoidal cyclic load was applied to the End-Notched Flexural (ENF) specimens and the fatigue behavior of specimens was investigated. Scanning Electron Microscope (SEM) was used to identify the damage features on the fracture surface, i.e. fiber imprints, cusps, roller cusps, and striations. It was found that the fatigue damage features, such as cusps and striations, completely depended on the fatigue crack growth rate,da/dN. In addition, a linear relationship between the fatigue striation space and the strain energy release rate range (ΔGs) and the hysteresis loop area was established. The Acoustic Emission (AE) method was also employed to characterize the damage features. The obtained results showed that higher AE energy indicates larger and rougher cusps and striation features.
影响因子：
13.1
作者：
Wu, Zhishen;Wang, Xin;Hamaguchi, Yasumasa
通讯作者：
Hamaguchi, Yasumasa