Adhesion becomes increasingly important in small-scale devices owing to typically large surface area to volume ratios and the need to maintain small gaps between various components, particularly in the presence of liquid films. Understanding the coupling between elasticity and capillarity is critical to the successful modeling of liquid-mediated adhesion between elastic bodies. A previous study established a generalized model for the contact of elastic spheres in both wet and dry conditions, with and without solid-solid contact. In this paper, the model is applied to investigate the approach and detachment process of two elastic spheres. The pull-off forces conditions are extracted from the force vs. separation curves. The variation of contact radius and pull-off force with liquid volume at the interface is studied for a fixed relative strength of liquid capillarity and solid-solid adhesion. Results of the calculations for vanishing liquid volume are compared to the classic JKR model.
- Tribology Division
Approach and Detachment of Two Elastic Spheres in Both Wet and Dry Conditions
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Zheng, J, & Streator, JL. "Approach and Detachment of Two Elastic Spheres in Both Wet and Dry Conditions." Proceedings of the STLE/ASME 2006 International Joint Tribology Conference. Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology. San Antonio, Texas, USA. October 23–25, 2006. pp. 1495-1498. ASME. https://doi.org/10.1115/IJTC2006-12303
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