Fatigue crack propagation behavior at a notch for needled C/SiC composite under tension-tension loading

被引：3

作者：

Hou, Geng ^{[1
]}

Shang, De-Guang ^{[1
]}

Zuo, Lin-Xuan ^{[2
]}

Qu, Lin-Feng ^{[2
]}

Xia, Ming ^{[1
]}

Guo, Yi-Er ^{[1
]}

Yin, Xiang ^{[1
]}

Wu, Shao-Dong ^{[1
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

[2] Aviat Ind Corp China Ltd, Shenyang Aircraft Design & Res Inst, Shenyang 110035, Peoples R China

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2022年 / 36卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Needled C; SiC composite; Fatigue crack; Fatigue resistance; Fiber bundle distribution; Notch; MATRIX COMPOSITES; ACOUSTIC-EMISSION; GROWTH-BEHAVIOR; DAMAGE; MICROSTRUCTURE; PREDICTION; INITIATION; EVOLUTION; STRENGTH; FAILURE;

D O I：

10.1007/s12206-021-1215-7

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue test of a needled C/SiC composite with a notch under tension-tension cyclic loading was completed, and the main fatigue crack propagation curve of the needled composite was obtained by the in situ observation of the fatigue process. By analyzing the influence of the failure number and distribution on the tensile loading subjected by 0 degrees fiber bundles, the relationship between the main fatigue crack propagation and the distribution of 0 degrees fiber bundles in the needled composite was established. By observing the fracture microstructure (especially the distribution of 0 degrees fiber bundles) of the needled composite through scanning electron microscopy, the reasons for the varying fatigue resistance of different notched specimens were also explained. In addition, acoustic emission (AE) was also used to analyze the AE energy characteristics during the fatigue crack propagation process of the needled composite.

引用

页码：167 / 177

页数：11

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