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Effect of pre-tension on the peeling behavior of a bio-inspired nano-film and a hierarchical adhesive structure
Peng ZL(彭志龙); Chen SH(陈少华); Chen, SH; Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationAPPLIED PHYSICS LETTERS
2012-10-15
Volume101Issue:16Pages:163702
ISSN0003-6951
AbstractInspired by the reversible adhesion behaviors of geckos, the effects of pre-tension in a bio-inspired nano-film and a hierarchical structure on adhesion are studied theoretically. In the case with a uniformly distributing pre-tension in a spatula-like nano-film under peeling, a closed-form solution to a critical peeling angle is derived, below or above which the peel-off force is enhanced or reduced, respectively, compared with the case without pre-tension. The effects of a non-uniformly distributing pre-tension on adhesion are further investigated for both a spatula-like nano-film and a hierarchical structure-like gecko's seta. Compared with the case without pre-tension, the pre-tension, no matter uniform or non-uniform, can increase the adhesion force not only for the spatula-like nano-film but also for the hierarchical structure at a small peeling angle, while decrease it at a relatively large peeling angle. Furthermore, if the pre-tension is large enough, the effective adhesion energy of a hierarchical structure tends to vanish at a critical peeling angle, which results in spontaneous detachment of the hierarchical structure from the substrate. The present theoretical predictions can not only give some explanations on the existing experimental observation that gecko's seta always detaches at a specific angle and no apparent adhesion force can be detected above the critical angle but also provide a deep understanding for the reversible adhesion mechanism of geckos and be helpful to the design of biomimetic reversible adhesives.
KeywordReversible Adhesion Gecko Attachment Force Capillarity Detachment Mechanisms Substrate Robust System Model
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000310669300070
Funding OrganizationThe work reported here was supported by NSFC through Grant Nos. 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/311007/46697
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. Effect of pre-tension on the peeling behavior of a bio-inspired nano-film and a hierarchical adhesive structure[J]. APPLIED PHYSICS LETTERS,2012,101(16):163702
APA 彭志龙,陈少华,Chen, SH,&Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China..(2012).Effect of pre-tension on the peeling behavior of a bio-inspired nano-film and a hierarchical adhesive structure.APPLIED PHYSICS LETTERS,101(16),163702.
MLA 彭志龙,et al."Effect of pre-tension on the peeling behavior of a bio-inspired nano-film and a hierarchical adhesive structure".APPLIED PHYSICS LETTERS 101.16(2012):163702.
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