Couple effect of surface energy and strain gradient on the mechanical behaviors of the biological staggered composites

doi:10.1016/j.compstruct.2021.114133

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	Couple effect of surface energy and strain gradient on the mechanical behaviors of the biological staggered composites
	Liu, Yanwei ; Ma HS(马寒松); Long, Hao ; Wei, Yueguang
发表期刊	COMPOSITE STRUCTURES
	2021-09
卷号	271 页码:114133
ISSN	0263-8223
摘要	Biological staggered composites, which are hierarchy spanning from nano scale to macro scale, boast remarkable mechanical properties. In this paper, a trans-scale shear-lag model is established based on the strain gradient theory and the Gurtin-Murdoch model, which provides a chance to glimpse how the micro-nano structures of the biological composite determine its macroscopic mechanical behavior. With the trans-scale shear-lag model, we found that the deformation, stress distribution and overall effective modulus have strong size effects, which are related to the thickness of the 'matrix' and 'platelet' of the biological staggered composites. Based on the analysis, two normalized numbers d/l and Es/(hEp) are proposed to describe the size effects caused by the thickness of the matrix and platelet, respectively. Besides, the predicted effective moduli of the biological staggered structure composites are compared with the experiments to verify our trans-scale shear-lag model. Our research sheds light on the understanding of the mechanical behaviors of the staggered biological composites and provides theoretical guidance for the design of high-performance bionic composite materials.
关键词	Biological staggered composites Strain gradient Surface energy Trans-scale shear-lag model Size effect
学科领域	Mechanics ; Materials Science, Composites
DOI	10.1016/j.compstruct.2021.114133
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000663802500005
项目资助者	National Natural Science Foundation of China [11890681, 11672301, 11572329, 11521202, 11432014]
论文分区	一类
力学所作者排名	2
RpAuthor	Wei, YG (corresponding author), Peking Univ, Coll Engn, Dept Mech & Engn Sci, BIC ESAT, Beijing 100871, Peoples R China.
引用统计	被引频次：9[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/311007/90248
专题	非线性力学国家重点实验室
作者单位	1.Peking Univ, Coll Engn, Dept Mech & Engn Sci, BIC ESAT, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yanwei,Ma HS,Long, Hao,et al. Couple effect of surface energy and strain gradient on the mechanical behaviors of the biological staggered composites[J]. COMPOSITE STRUCTURES,2021,271:114133.Rp_Au:Wei, YG (corresponding author), Peking Univ, Coll Engn, Dept Mech & Engn Sci, BIC ESAT, Beijing 100871, Peoples R China.
APA	Liu, Yanwei,马寒松,Long, Hao,&Wei, Yueguang.(2021).Couple effect of surface energy and strain gradient on the mechanical behaviors of the biological staggered composites.COMPOSITE STRUCTURES,271,114133.
MLA	Liu, Yanwei,et al."Couple effect of surface energy and strain gradient on the mechanical behaviors of the biological staggered composites".COMPOSITE STRUCTURES 271(2021):114133.

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