A computational homogenization framework for soft elastohydrodynamic lubrication

Date
2012
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Computational Mechanics
Print ISSN
0178-7675
Electronic ISSN
Publisher
Springer
Volume
49
Issue
6
Pages
749 - 767
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Series
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.

Course
Other identifiers
Book Title
Keywords
Finite deformation, Homogenization, Reynolds equation, Surface roughness, Computational costs, Computational homogenization, Computationally efficient
Citation
Published Version (Please cite this version)