Modelling adhesion and friction in contact problems

Mohsen Khajeh Salehani

    Research output: ThesisDissertation (TU Delft)

    127 Downloads (Pure)

    Abstract

    The main objective of this thesis is to obtain a better understanding of adhesive contacts and their frictional behaviour. Both natural and man-made surfaces are rough over a wide range of length scales. Tribological studies of rough surfaces need to account for the interactions between these asperities. In this work a sim- ple atomistically–inspired macro-scale model is developed to study smooth and rough contacts between elastically deformable bodies where adhesion and fric- tion are simultaneously active at the interface. A full description of the model is presented in Chapter 2. There, the Green’s function molecular dynamics (GFMD) technique is extended to explicitly de- scribe the two solids in contact and their mixed-mode interface interactions. The interactions between surfaces are described through a coupled cohesive-zone model implemented in the GFMD technique. The extended GFMD technique includes an incremental iterative scheme, which is necessary to capture the con- tact area evolution when tangential tractions develop at the interface between the solids under loading.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • Delft University of Technology
    Supervisors/Advisors
    • Nicola, Lucia, Supervisor
    • Irani, Nilgoon, Advisor
    Award date9 Jul 2019
    Print ISBNs978-94-6380-408-0
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Adhesion and friction
    • Contact Area and Load
    • Cohesive Law
    • Rough Surfaces
    • Green’s Function Molecular Dynamics
    • tribology

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