On the role of adhesion and roughness in stick-slip transition at the contact of two bodies: A numerical study

M. Bazrafshan* (Corresponding Author), M. B. de Rooij, D. J. Schipper

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    8 Citations (Scopus)
    1 Downloads (Pure)

    Abstract

    This paper proposes a boundary element model for the stick-slip transition at the contact of two bodies of dissimilar materials in presence of adhesion due to van der Waals force. The adhesion is modeled using a Dugdale approximation of adhesive energy. The coupling between the normal pressure and shear stresses is included so that there is no full-stick condition, even in the absence of an external shear stress. Furthermore, the evolution of the slip area over the contact area is different from the well-known Cattaneo-Mindlin solution due to the difference in the mechanical properties of the contacting bodies. It is also shown that the adhesion increases the pre-sliding distance and the static friction. While roughness can only increase the former one. However, the combined effect of roughness and adhesion on the pre-sliding distance is not cumulative as these two parameters are found to be symbiotic.

    Original languageEnglish
    Pages (from-to)381-388
    Number of pages8
    JournalTribology international
    Volume121
    DOIs
    Publication statusPublished - 1 May 2018

    Keywords

    • Roughness
    • Stick-slip
    • Adhesion

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