A computational homogenization framework for soft elastohydrodynamic lubrication
Date
2012Source Title
Computational Mechanics
Print ISSN
0178-7675
Publisher
Springer
Volume
49
Issue
6
Pages
749 - 767
Language
English
Type
Conference PaperItem Usage Stats
131
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91
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Abstract
The interaction between microscopically rough surfaces and hydrodynamic thin film lubrication is investigated under the assumption of finite deformations. Within a coupled micro-macro analysis setting, the influence of roughness onto the macroscopic scale is determined using FE 2-type homogenization techniques to reduce the overall computational cost. Exact to within a separation of scales assumption, a computationally efficient two-phase micromechanical test is proposed to identify the macroscopic interface fluid flux from a lubrication analysis performed on the deformed configuration of a representative surface element. Parameter studies show a strong influence of both roughness and surface deformation on the macroscopic response for isotropic and anisotropic surfacial microstructures.
Keywords
Finite deformationHomogenization
Reynolds equation
Surface roughness
Computational costs
Computational homogenization
Computationally efficient