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Friction Dynamics of Geckolike Materials

Published online by Cambridge University Press:  28 July 2016

Jonathan B. Puthoff
Jonathan B. Puthoff*
Affiliation:
California State Polytechnic University, Pomona, 3801 West Temple Avenue, Pomona, CA 91768, U.S.A.
*
*(Email: jbputhoff@cpp.edu)
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Abstract

The interface between the adhesive toes of geckos and a substrate consists of an array of regularly sized, densely packed, and elastically coupled nanoscopic contacts. The velocity-dependent friction exhibited by this system hints at a convolution of various material and structural effects. We explore the dynamics of frictional sliding in these materials using models based on arrays of coupled masses driven by external forces that can become pinned and unpinned to a potential energy landscape. The model system is driven at normalized velocities spanning 6 orders of magnitude, and the output of this model captures both the low-V and high-V behavior of the actual gecko materials. We explore modifications to the essential model that incorporate features more representative of the structure and behavior of the natural gecko system. These results have implications in the design of materials with custom frictional properties.

Keywords

tribologybiomimetic (assembly)adhesive
Type
Articles
Information
MRS Advances , Volume 1 , Issue 40: Characterization and Modeling of Materials , 2016 , pp. 2769 - 2775
Copyright
Copyright © Materials Research Society 2016 

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References

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