Abstract
This study employs an atomic-scale model to investigate mechanical contact behaviors of a single asperity, particularly those which take place beyond the elastic limit threshold. The results obtained from the current model are found to be in good agreement with the predictions yielded by continuum theory as the contact behavior of the asperity transits from fully elastic to elastoplastic contact interface. Furthermore, the result shows that adhesion within the single asperity has the negligible influence during the loading stage; however, the adhesion force leads to the sizable clusters of copper atoms on the rigid plate during the unloading stage.
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