IMECH-IR  > 非线性力学国家重点实验室
The effect of geometry on the adhesive behavior of bio-inspired fibrils
Peng ZL(彭志龙); Chen SH(陈少华); Chen, SH; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationSOFT MATTER
2012-10-01
Volume8Issue:38Pages:9864-9869
ISSN1744-683X
AbstractInspired by the special climbing ability of geckos and insects, the effects of geometry, including the end-shape and size, on the adhesion features of bio-inspired fibrils, are investigated. It is found that, the adhesion force of a mushroom-shaped fibril in perfect contact with a rigid substrate decreases with the increase of the peeling angle, but it will increase with an increasing flange thickness at a determined peeling angle. With the same contact length, the mushroom-shaped fibril can achieve much larger adhesion forces than the cylindrical or spatular one due to a larger effective region of the cohesive zone. The effect of the shaft width of the mushroomed-shaped fibril on the adhesion force with and without interfacial defects is also considered, and the results are further compared qualitatively with the experimental ones. A critical contact length for the mushroom-shaped fibril is further found, above which the adhesion force attains a maximum. For a multi-fibril structure, the phenomenon of almost equal load sharing for each fibril is verified numerically, which is consistent with the existing experimental observation. All the results in this paper should be helpful for the understanding of the micro-adhesion mechanism of biological adhesive systems and the design of novel adhesives.
KeywordContact Shape Crack-growth Zone Model Nano-film Microstructure Attachment Force Interfaces Mechanics Friction
Subject Area新型材料的力学问题
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000308661700016
Funding OrganizationThe work reported here is supported by NSFC through grants #10972220, #11125211, #11021262 and the 973 Nano-Project (2012CB937500).
DepartmentLNM仿生材料与固体的微尺度力学
Classification一类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46737
Collection非线性力学国家重点实验室
Corresponding AuthorChen, SH; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Peng ZL,Chen SH,Chen, SH,et al. The effect of geometry on the adhesive behavior of bio-inspired fibrils[J]. SOFT MATTER,2012,8(38):9864-9869.
APA Peng ZL,Chen SH,Chen, SH,&Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China..(2012).The effect of geometry on the adhesive behavior of bio-inspired fibrils.SOFT MATTER,8(38),9864-9869.
MLA Peng ZL,et al."The effect of geometry on the adhesive behavior of bio-inspired fibrils".SOFT MATTER 8.38(2012):9864-9869.
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