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

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    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

    Fingerprint

    Stick-slip
    adhesion
    slip
    roughness
    Adhesion
    Surface roughness
    shear stress
    sliding
    Shear stress
    Insulator Elements
    static friction
    Dissimilar materials
    Van der Waals forces
    adhesives
    Adhesives
    mechanical properties
    Friction
    Mechanical properties
    approximation
    energy

    Keywords

    • Roughness
    • Stick-slip
    • Adhesion

    Cite this

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    title = "On the role of adhesion and roughness in stick-slip transition at the contact of two bodies: A numerical study",
    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.",
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    On the role of adhesion and roughness in stick-slip transition at the contact of two bodies : A numerical study. / Bazrafshan, M. (Corresponding Author); de Rooij, M. B.; Schipper, D. J.

    In: Tribology international, Vol. 121, 01.05.2018, p. 381-388.

    Research output: Contribution to journalArticleAcademicpeer-review

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    T1 - On the role of adhesion and roughness in stick-slip transition at the contact of two bodies

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    AB - 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.

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