Cyclic loading of an elastic-plastic adhesive spherical microcontact

被引：0
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作者：
Kadin, Y. [1 ]
Kligerman, Y. [1 ]
Etsion, I. [1 ]
机构：
[1] Department of Mechanical Engineering, Technion-Israel Institute of Technology, Technion City, Haifa, 32000, Israel
来源：
Journal of Applied Physics | 2008年 / 104卷 / 07期
关键词：
A previous study of a single load-unload cycle of an adhesive contact between an elastic-plastic microscopic sphere and a rigid flat is extended here for several load-unload cycles. The interacting forces between the sphere and the flat obey the Lennard-Jones potential. Kinematic hardening is assumed for the sphere material to account for possible plastic shakedown; and the difference between kinematic and isotropic hardenings is discussed. The main goal of the current work is to investigate the evolution of the load-approach curves for the elastic-plastic spherical contact during its cyclic loading-unloading. These curves are presented for different physical conditions; represented by three main dimensionless parameters; which affect the behavior of the elastic-plastic adhesive contact. A transition value of the Tabor parameter is found; below which the load-approach curves are always continuous and jump-in and jump-out instabilities are not expected. © 2008 American Institute of Physics;
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