On the load-area relation in rough adhesive contacts

M. Khajeh Salehani, J. S. van Dokkum, N. Irani, L. Nicola*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)
    73 Downloads (Pure)


    It is well established that, at small loads, a linear relation exists between contact area and reduced pressure for elastic bodies with non-adhesive rough surfaces. In the case of adhesive contacts, however, there is not yet a general consensus on whether or not linearity still holds. In this work evidence is provided, through numerical simulations, that the relation is non-linear. The simulations here presented can accurately describe contact between self-affine adhesive rough surfaces, since they rely on Green's function molecular dynamics to describe elastic deformation and on coupled phenomenological traction-separation laws for the interfacial interactions. The analysis is performed for two-dimensional compressible and incompressible bodies under plane strain conditions. Interfaces with various roughness parameters and work of adhesion are considered.

    Original languageEnglish
    Article number106099
    Number of pages7
    JournalTribology International
    Publication statusPublished - 2020


    • Adhesion
    • Cohesive-zone model
    • Contact area and load
    • Self-affine roughness


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