期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 153, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2021.106507
关键词
Polymer matrix composites; Damage accumulation; Process monitoring; Fatigue crack growth
资金
- National Natural Science Foundation of China [52073224, 12002248]
- National Key Research and Development Program of China [2019YFA0706801]
- Innovation Capacity Support Plan of Shaanxi, China [2020PT-043]
- Scientific and Technology Project for Overseas Students of Shaanxi, China [12]
- Thousand Talents Program of Shaanxi, China
- Research Fund for the Doctoral Program of Xi'an Polytechnic University [BS201910]
- Natural Science Basic Research Program of Shaanxi [2020JQ-819, 2021JQ-659]
The static flexural strength of 3D stitched composite was lower than 2D laminated composite, but the modulus was higher. The fatigue failure mechanism of 3D stitching composite was dependent on stress levels.
This work investigated the static and fatigue properties of 3D stitched composite and 2D laminated composite subjected to three-point bending loads. Four stress levels were carried out to investigate fatigue characteristics of the composites. The failure propagation of the composites and their fracture morphology were captured in detail using the high-speed camera. The results demonstrated that the static flexural strength of 3D stitched composite was lower than 2D laminated composite but the modulus of 3D stitched composite was higher than that of the latter. Besides, the fatigue failure mechanism of 3D stitching composite was dependent on the stress levels. Though the fatigue life of the 3D stitching composite was not as good as 2D laminated composite, the failure of stitching thread proved to be able to judge the catastrophic damage of the 3D stitching composite, which is important for indicating the safe use of the composite structure.
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