Modelling adhesion and friction in contact problems

Modelling adhesion and friction in contact problems

Khajeh Salehani, M. (TU Delft MSE-7)

Nicola, L. (promotor)
Irani, N. (copromotor)

Delft University of Technology

2019-07-09

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.

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

https://doi.org/10.4233/uuid:d53f2842-480c-4cf2-b8c7-cbaf157d4398

978-94-6380-408-0

2020-10-01

Institutional Repository

doctoral thesis

© 2019 M. Khajeh Salehani