Analyses on the Effect of Poisson Ratio on the Adhesive Contact between an Elastic Sphere and a Rigid Half-Space

Project: National Science and Technology CouncilNational Science and Technology Council Academic Grants

Project Details

Abstract

In recent years, there are many new fields developing in tribology, such as micro/nano tribology, biotribology, biomimetics , ecotribology, tribology and space tribology. Among these new fields, micro/ nano tribology is the most fundamental and important field. Micro/nano tribology is also fundamental for biomimetics, ecotribology, tribology and space tribology. The adhesive contact between an elastic sphere and a rigid half-space is the most fundamental and important issue in micro/nano contact. In the past, this issue has been investigated by theoretical analysis, numerical analysis, finite element method and boundary element method. The adhesive contact is affected by three parameters: Tabor parameter, radius of sphere and Poisson ratio. However, only the effects of Tabor parameter and radius of sphere were investigated in the past. The effect of Poisson ratio has never been investigated. Recent researches show that Poisson ratio does affect the adhesive contact. The contact radius, jump-in distance and pull-off distance are all affected Poisson ratio. In this research, boundary element method is employed to analyze the effect of Poisson ratio on the adhesive contact between an elastic sphere and a rigid half-space. The relationships for load-approach and contact radius-load will be analyzed. The semi-empirical formula will be obtained. The research for the adhesive contact between sphere and half-space will become complete by this research. Thus, the research for micro/nano contact will make great progress.

Project IDs

Project ID:PB10507-2923
External Project ID:MOST105-2221-E182-018
StatusFinished
Effective start/end date01/08/1631/07/17

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