Abstract
This study provides a novel insight into the study of static friction force. From numerical simulations with a simplified sliding model in which the friction force between an elastic slider with a split contact interface and a rigid base block with a smooth surface was analyzed, it was found that the existence of the stop–restart motion works to increase static friction force, while the stop–inversion motion reduces static friction force. Thus, the numerical simulations in this study demonstrated that the magnitude of static friction force varies with different types of tangential loading sequences. Furthermore, it was found from an analytical discussion that the magnitude of this tangential loading history effect is characterized by the dispersion level of the threshold lengths for the onset of slip motion at each contact point and also by the ratio of kinetic friction coefficient to static friction coefficient at the contact interface. Through the previously mentioned analytical approaches, this study emphasizes that the sequence of tangential loading is an important factor for characterizing the magnitude of static friction force.
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