Dynamic adhesive forces in rough contacting bodies including normal and sliding conditions

Chang Dong Yeo, Jungkyu Lee, Andreas A. Polycarpou

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Using a high-resolution, high-dynamic bandwidth capacitive force transducer and two piezoelectric actuators, adhesive pull-off forces between nominally flat rough silicon surfaces were measured under various dynamic conditions in normal and tangential directions and environmental humidity levels. The upper specimen approached and retracted with a constant velocity in the vertical (normal) direction, while the lower specimen started moving in the horizontal (tangential) direction during the middle of the contact. The experiments were performed under 35 and 60% relative humidity conditions. It was found that sliding of the contacting surfaces led to a significant reduction in pull-off forces under low-humidity contact conditions, whereas it caused higher pull-off forces under partially wet contact conditions. Comparing the effects of sliding velocity and sliding distance on the measured pull-off force values, it was found that the sliding distance played an important role in the increase in pull-off forces.

Original languageEnglish
Pages (from-to)2709-2718
Number of pages10
JournalJournal of Adhesion Science and Technology
Volume26
Issue number24
DOIs
StatePublished - Dec 1 2012

Keywords

  • dynamic adhesion
  • friction
  • rough surfaces
  • sliding

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