Molecular Dynamics Simulation on the Adhesive Contact between a Sphere and a Half-Space

Molecular dynamics simulation is used to analyze the adhesive contact between a nano-scale sphere and a rigid plane. The result will be compared with the JKR and the Maugis models. In the adhesive contact between a sphere and a rigid plane, there are three famous 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. Numerical simulation is suitable for the simulation in micro-scale analysis. Molecular dynamics simulation is suitable for the simulation in nano-scale analysis. Finite element analysis is suitable for the simulation between these micro and nano scale analysis. Basically, molecular dynamics simulation is a computer experiment. Molecular dynamics simulations are employed for the adhesive contact between a sphere and a rigid plane for a long time. However, in the past, molecular dynamics simulations were employed for specific materials and specific energy functions. Then, the results were compared with the models. There is no theoretical analysis. In this research, Lennard-Jones potential can be used to describe the potential between two molecules. Non-dimensional analyses will be performed. Then, analyze the adhesive contact with the sphere from micro to nano scales and with different Tabor parameters. The transition from micro to nano adhesive contact will be analyzed. The result will make import contributions in the basic theories of adhesive contact.

Project ID:PB10107-1755
External Project ID:NSC101-2221-E182-021