The effects of fiber's surface roughness on the mechanical properties of fiber-reinforced polymer composites

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	The effects of fiber's surface roughness on the mechanical properties of fiber-reinforced polymer composites
	Yao Y(姚寅); Chen SH(陈少华)
刊名	JOURNAL OF COMPOSITE MATERIALS
	2013-10
通讯作者邮箱	chenshaohua72@hotmail.com
卷号	47 期号:23 页码:2909-2923
关键词	fiber-reinforced polymer composites interface roughness shear-lag model stress transfer effective Young s modulus
ISSN号	0021-9983
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
产权排序	[Yao, Yin;Chen, Shaohua] Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China
中文摘要	An improved shear-lag model is developed in this paper to study the effects of interface roughness on the mechanical properties of unidirectional fiber-reinforced polymer composites with a staggered structure, in which the roughness is incorporated by establishing equilibrium equations for the fiber platelets with varying thickness along its axial direction. The stress transfer and effective Young's modulus of composites are mainly investigated due to the influence of fiber's surface roughness. Since the polymer matrix can be chosen as thermoplastic or thermosetting materials, a uniformly interfacial shear stress distribution due to the frictional transfer along fiber/matrix interfaces and a non-uniformly one due to the elastic transfer are analyzed, respectively. It is found that when the surface roughness becomes larger, fibers in the former will carry more tensile loads, while the tensile loads keep almost invariant in fibers and the shear stress reduces in matrix in the latter. Moreover, the effective Young's modulus of composites will be enhanced due to increasing fiber's surface roughness. However, the enhancing effect will gradually reduce with an increasing aspect ratio of fibers. The results should be very useful for the design of novel fiber-reinforced polymer composites, especially for those that needed interfacial modifications in order to improve the interfacial adhesion, for example, carbon-fiber reinforced polymer composites.
学科主题	复合材料力学
分类号	二类/Q2
收录类别	SCI ; EI
资助信息	National Natural Science Foundation of China (NSFC)[10972220,11125211,11021262]; the 973 Nano-project [2012CB937500].
原文出处	http://dx.doi.org/10.1177/0021998312459871
语种	英语
WOS记录号	WOS:000329545100008
公开日期	2013-12-16
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47584]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Yao Y,Chen SH. The effects of fiber's surface roughness on the mechanical properties of fiber-reinforced polymer composites[J]. JOURNAL OF COMPOSITE MATERIALS,2013,47(23):2909-2923.
APA	Yao Y,&Chen SH.(2013).The effects of fiber's surface roughness on the mechanical properties of fiber-reinforced polymer composites.JOURNAL OF COMPOSITE MATERIALS,47(23),2909-2923.
MLA	Yao Y,et al."The effects of fiber's surface roughness on the mechanical properties of fiber-reinforced polymer composites".JOURNAL OF COMPOSITE MATERIALS 47.23(2013):2909-2923.