Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites

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	Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites
	Yao Y(姚寅); Chen SH(陈少华); Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
	2013-03
卷号	80 期号:2 页码:021015/1-021015/13
ISSN	0021-8936
摘要	Surface modifications are known as efficient technologies for advanced carbon fibers to achieve significant improvement of interface adhesion in composites, one of which is to increase the surface roughness in the fiber's longitudinal direction in practice. As a result, many microridges and grooves are produced on carbon fiber's surfaces. How does the surface roughness influence the carbon fiber's pull-out behavior? Are there any restrictions on the relation between the aspect ratio and surface roughness of fibers in order to obtain an optimal interface? Considering the real morphology on carbon fiber's surface, i.e., longitudinal roughness, an improved shear-lag theoretical model is developed in this paper in order to investigate the interface characteristics and fiber pull-out for carbon fiber-reinforced thermosetting epoxy resin (brittle) composites. Closed-form solutions to the carbon fiber stress are obtained as well as the analytical load-displacement relation during pullout, and the apparent interfacial shear strength (IFSS). It is found that the interfacial adhesion and the apparent IFSS are effectively strengthened and improved due to the surface roughness of carbon fibers. Under a given tensile load, an increasing roughness will result in a decreasing fiber stress in the debonded zone and a decreasing debonded length. Furthermore, it is interesting to find that, for a determined surface roughness, an optimal aspect ratio, about 30 similar to 45, of carbon fibers exists, at which the apparent IFSS could achieve the maximum. Comparison to the existing experiments shows that the theoretical model is feasible and reasonable to predict the experimental results, and the theoretical results should have an instructive significance for practical designs of carbon/epoxy composites.
关键词	Carbon/epoxy Composites Longitudinal Surface Roughness Shear-lag Model Fiber Pull-out Apparent Ifss
学科领域	复合材料力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000326175400028
项目资助者	National Science Foundation of China [10972220, 11125211, 11021262]; Key Project [2012CB937500]
课题组名称	LNM仿生材料与固体的微尺度力学
论文分区	一类/力学重要期刊
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47556
专题	非线性力学国家重点实验室
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Yao Y,Chen SH,Chen, SH . Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites[J]. JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,2013,80,2,:021015/1-021015/13.
APA	姚寅,陈少华,&Chen, SH .(2013).Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites.JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME,80(2),021015/1-021015/13.
MLA	姚寅,et al."Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites".JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME 80.2(2013):021015/1-021015/13.

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