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Title:Fundamental Modeling and Experimental Investigation of Dynamic Friction at the Meso and Micro Scales
Author(s):Shi, Xi
Doctoral Committee Chair(s):Polycarpou, Andreas A.
Department / Program:Mechanical Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Mechanical
Abstract:In this work, a basic dynamic friction model without any empirical parameters has been developed and used to predict and explain important dynamic friction phenomena. The validation of the proposed dynamic friction model has also been confirmed via experimental measurements. Moreover, adhesion effects on the dynamic friction have been discussed for low roughness surfaces in contact, as is the case in micro applications, such as magnetic storage applications. The adhesion model is based on the improved DMT contact mechanics model, and the simulation results have shown certain limitations of the proposed adhesion and dynamic friction models. To better improve such modeling efforts, an advanced single spherical adhesive contact model, termed Maugis-Dugdale model, has been extended for non-contacting situations thus providing a comprehensive model for the full approach range. This advanced model was then used to study the associated instabilities for elastic spherical adhesive contacts. Furthermore, the proposed single spherical adhesive contact model has been applied to rough surface in contact by combining it with an improved elastic-plastic contact model. The last part of this work is the experimental measurement of key interfacial parameters including contact stiffness and contact damping. A unique dynamic contact tester has been developed capable for both meso and micro scale contact experiments. We report, for the first time, measurement results of the contact stiffness and contact damping of magnetic storage samples that is very important in dynamic studies.
Issue Date:2005
Description:182 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005.
Other Identifier(s):(MiAaPQ)AAI3182379
Date Available in IDEALS:2015-09-25
Date Deposited:2005

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