Abstract
Aiming to explain phenomena of “stiction” and “snap-back”, a ball-surface adhesion is simulated with molecular dynamics (MD) based on multi-body EAM potential function. Surface atoms “summon up” and migrate, which lead to the phenomenon of “stiction”. The migration velocity of interface atom is not consistent. Some atoms migrate too fast, which lead to the phenomenon of “snap-back”. The “Snap-back” phenomenon appears twice during the adhesion process. A “neck-separation” phenomenon is found. The adhesive force in the separation process obviously lagged the adhesive force in the contact process, which shows there is energy loss during the adhesion process. The curve of adhesion deformation is simulated finally, and compared with relevant results.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference7 articles.
1. Tian W C, Wang L B, Jia J Y, Casimir force, Hamaker force and snap-back, Acta Phys. Sin, 2010, 59(2), 1175.
2. Fan K Q, Jia J Y, Zhu Y M, Zhang X Y, Adhesive contact: from atomistic model to continuum model, Chin. Phys. B, 2011, 20(4), 043401.
3. Hertlein C, Helden L, Gambass A, Dietrich S, Bechinger C, Direct measurement of critical Casimir force, Nature, 2008, 451(10), 172.
4. Philip B, Feel the force, Nature, 2007, 447(14), 772.
5. Feng Y, Lin J Z, The collision e±ciency of spherical dioctyl phthalate aerosol particles in the Brownian coagulation, Chinese Physics B, 2008, 17(12), 4547.