Abstract
This work focused on the surface expansion of the contact surface and its influence on the interface adhesion phenomena in wedge indentation of an aluminum specimen. Direct in-situ observations coupled with high-speed imaging and particle image velocimetry techniques were performed to characterize and quantify the surface expansion behavior at the contact surface. A series of experiments showed that the surface expansion distribution at the contact surface plays a pivotal role in determining the adhesion force. The quantitative relationship between the distributions of the surface expansion and adhesion force was discussed by using single-groove indenters.
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