**2.3 Formulation of 3D finite element implementation for adhesive contact at nanoscale**

A research was carried out [5] for three dimensional nanoscale contact problems with strong adhesion. The contact description was based on Lennard Jonnes [5] description suitable to explain Vanderwaals attraction between interacting bodies. By incorporating the potential into nonlinear continuum mechanics, formulations had been arrived for surface force and body force. Based on these formulations, overall contact algorithm had been arrived using FEM. This model has an application in biomechanics as denoted by adhesion of gecko spatula [5]. Efficient FE formulation was arrived based on surface traction. The behavior of contact model described by SF formulation was more efficient than BF formulation for strong adhesive existence.
