Abstract
The presented finite element model uses a special arrangement of contact elements to simulate surface roughness. Rough surfaces are described by three parameters: average roughness height, correlation length and coefficient of friction. The standard programme AN SYS® is used to perform the calculations. Results of a finite element simulated Microbond Test using fracture mechanics approach for crack propagation and the presented model for interfacial friction are shown as an example. The pull-out after complete debonding is also simulated. The influence of the surface parameters mentioned above on simulated load vs. displacement curves is studied, especially their effect on the stability of crack propagation and the interactions between the surface parameters (frictional coefficient, roughness height) and interface parameters (critical stress intensity factors for crack propagation).
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