Size-dependent adhesion strength of a single viscoelastic fiber

Shaohua Chen, Guang Xu, Aikah Soh

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

Nano-fibrillar adhesives can adhere strongly to surfaces as a gecko does. The size of each fiber has significant effects on the adhesion enhancement, especially on rough surfaces. In the present study, we report the size effects on the normal and shear strength of adhesion for a single viscoelastic fiber. It is found that there exists a limited region of the critical sizes under which the interfacial normal or tangential tractions uniformly attain the theoretical adhesion strength. The region for a viscoelastic fiber under tension with similar material constants to a gecko's spatula is 135-255 nm and that under torque is 26.5-52 nm. This finding is significant for the development of artificial biomimetic attachment systems.

Original languageEnglish
Pages (from-to)375-379
Number of pages5
JournalTribology Letters
Volume37
Issue number2
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

Keywords

  • Adhesion strength
  • Fibrillar structure
  • Size effect
  • Viscoelasticity

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