Journal
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 465, Issue 2103, Pages 961-981Publisher
ROYAL SOC
DOI: 10.1098/rspa.2008.0362
Keywords
fibrillar adhesion; preload; pull-off force; indentation; work of adhesion
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We determined how preload and work of adhesion control the force required to pull a circular cylindrical indenter off a microfibre array. Five regimes, with different contact behaviours, are identified for the unloading phase of indentation. These regimes are governed by two dimensionless parameters. Above a critical preload, the pull-off force and the pull-off stress reach a plateau value. The critical preload, as well as the plateau pull-off force (stress), is found to depend on a single dimensionless parameter q, which can be interpreted as a normalized work of adhesion.
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