Detaching speed of a fibrillar interface

Chen, B.; Wu, P. D.; Huang, Y.
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p103901
Academic Journal
Considering elastic energy stored in the fibrillar structure recoverable, we provide different initial and dynamic fracture toughnesses for a fibrillar interface to reconcile the contradiction existing in literature. A theory on the speed of a semi-infinite crack propagating along a fibrillar interface is then developed, which is used to estimate the speed of gecko toe detachment. The predicted time interval for gecko toe detachment is less than a few milliseconds.


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