Viscoelastic adhesion of a spherical tip indenting a flat rigid surface using Lennard-Jones interaction

Solid and elastic contact problems have been thoroughly investigated before. the most recent efforts incorporate the use of the lennard-jones (lj) potential to describe the inter-surface forces that are present and substantial in micro-sized contact problems. but little work has been done on viscoelastic contact problems. hence,there is a need to investigate the behaviour of a viscoelastic contact under the lj interaction. this paper aims to investigate the deformation of an axisymmetric viscoelastic tip that is either pushed onto or pulled from a flat rigid surface. from existing elastic models,a mathematical model was developed to describe the contact problem in a viscoelastic context. this newly developed was solved via numerical means. the result is a model that readily accepts measureable physical properties and gives out the deformation of a viscoelastic tip. © 2015 penerbit utm press. all rights reserved.