Multi-asperity elliptical JKR model for adhesion of a surface with non-axially symmetric asperities

作者：Perni Stefano; Prokopovich Polina^*

来源：Tribology International, 2015, 88: 107-114.

DOI：10.1016/j.triboint.2015.03.001

• Adhesion
• JKR model
• Multi-asperity contact model
• Asymmetric asperities

Surfaces can present high levels of topographic asymmetry and, therefore, theories based on the assumption of symmetry cannot be effectively employed.
A new multi-asperity adhesion model that assumes that asperities are not perfectly hemispherical is presented here, this model is based on the elliptical JKR model for a single asperity. The adhesion between a soft tissue with asperities greatly asymmetric and a polymer was modelled, the predicted adhesion forces were successfully validated against experimentally obtained data. Moreover, simulations with a simpler model, which assumes symmetrical asperities, have been also carried out; these results were significantly different from those obtained, using both the newly developed model and those determined experimentally. This highlights the importance of the model presented in this work.

• 出版日期2015-8