含缺陷三维编织复合材料拉伸性能试验

doi:10.11896/cldb.19070028

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Abstract In order to study the defect effect on three dimensional (3D) braided composite, two types of 3D braided specimens involved the defect were fabricated and tested. One was the pure braided pattern, the other one incorporated 42% of longitudinal lay-in yarns. A quasi-static tensile strength test was carried out for test parts with and without defects in accordance with ASTM D3039 and D5799, respectively, which was compared with laminates. The results showed that with or without defect, the pure braided 3D composites have higher strength than lay-in structure, the lay-in longitudinal yarns improve neither specimens nondefective strength, nor the defective strength. The both two types of 3D braided composites can retain higher proportion of tensile strength in comparison with laminates after involved the defect. Regarding the failure behavior, crack of both defective specimens will propagate along the defect and finally render the specimen fail, clear cracks usually show up on the samples without axial yarns, while not for the specimens with axial yarns.

Key words： defect 3D braided composite tensile strength failure

Published: 14 July 2020

CLC number:

TB332

About author:: Shuangqiang Liangis Ph.D. candidate in mechanical engineering from the Donghua University. He has published 6 journal papers, applied 7 national invention patents and 4 of them was authorized. His research interests focus on the advanced textile composite technology, composite properties prediction and failure analysis.
Ge Chenobtained his Ph.D. degree from the Donghua University (DHU) in 2001 and served in school of Mechanical Engineering, DHU till now. He performed Post-doctoral research in 2005—2006 in Georgia Institute of Technology. He has published more than 80 papers, authorized 20 invention patents. His team's research interests are advanced 3D textile equipment developing and textile composite, mechanical design and theory.

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	LIANG Shuangqiang
	CHEN Ge
	ZHOU Qihong
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Cite this article:

LIANG Shuangqiang,CHEN Ge,ZHOU Qihong, et al. Tensile Property Test of 3D Braided Composites with Defects[J]. Materials Reports, 2020, 34(14): 14209-14213.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19070028 OR http://www.mater-rep.com/EN/Y2020/V34/I14/14209

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