Abstract:
:We present a synthetic adaptation of the fibrillar adhesion surfaces found in nature. The structure consists of protruding fibrils topped by a thin plate and shows an experimentally measured enhancement in adhesion energy of up to a factor of 9 over a flat control. Additionally, this structure solves the robustness problems of previous mimic structures and has preferred contact properties (i.e., a large surface area and a highly compliant structure). We show that this geometry enhances adhesion because of its ability to trap interfacial cracks in highly compliant contact regimes between successive fibril detachments. This results in the requirement that the externally supplied energy release rate for interfacial separation be greater than the intrinsic work of adhesion, in a manner analogous to lattice trapping of cracks in crystalline solids.
journal_name
Proc Natl Acad Sci U S Aauthors
Glassmaker NJ,Jagota A,Hui CY,Noderer WL,Chaudhury MKdoi
10.1073/pnas.0703762104subject
Has Abstractpub_date
2007-06-26 00:00:00pages
10786-91issue
26eissn
0027-8424issn
1091-6490pii
0703762104journal_volume
104pub_type
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