Finite Element Analysis on the Elasto-Plastic Adhesive Contact between a Sphere and a Half-Space

The researches about the elastic adhesive contact between a sphere and a half-space have been developed for decades. There are three famous analytical models: JKR, DMT and Maugis models. The JKR applies for soft spheres. The DMT applies for rigid spheres. The Maugis model applies for the transition from the JKR to the DMT models. In simulations, numerical simulation, finite element analysis and molecular dynamics simulation are used widely. In recent five years, several papers about the elasto-plastic adhesive contact between a sphere and a half-space have been published. Most of the researches use finite element analysis. Till now, most researches used approximate adhesive force, used large spheres, and are focused on some specific materials. Therefore, these researches can no be used widespread. This research is focused on the elasto-perfect plastic adhesive contact between a sphere and a half-space. Lennard-Jones potential is used to describe the potential between two molecules. Using large deformation analyses, the adhesive contact can be obtained. Analyses are employed with different parameters. Then, analyze the pull-off force, contact area-load relationship, force distribution and the onset of the plastic deformation. The curve fitting equations for the results will be found. The result will make import contributions in the basic theories of adhesive contact.

Project ID:PB10207-1887
External Project ID:NSC102-2221-E182-017