Semi-analytical model for rough multilayered contacts
File(s)
Author(s)
Nyqvist, J
Kadiric, A
Ioannides, S
Sayles, R
Type
Journal Article
Abstract
This paper presents a new model for analysis of non-conformal rough surface contacts where one or both of the contacting bodies are coated with a multilayered coating. The model considers elastic contact of arbitrary geometry with real measured roughnesses and both normal and tangential surface loads. It predicts contact pressure distribution, surface deformations and full subsurface stress field. As such, the model offers an optimisation tool for analysis and development of multilayered coatings. Influence coefficients approach is utilised to obtain contact pressures and subsurface stresses while the contact solver is based on a standard conjugate gradient method. To improve model efficiency, a semi-analytical approach is devised, where the influence coefficients for displacements and stresses are expressed explicitly by solving the fundamental equations in the frequency domain. Fast Fourier Transforms in conjunction with discrete convolution are then utilised to provide the solution in spatial domain. Selected results are presented to first validate the model and then illustrate the potential improvements that can be achieved in the design of multilayered coatings through application of the model.
Date Issued
2015-01-14
Date Acceptance
2015-01-08
Citation
Tribology International, 2015, 87, pp.98-112
ISSN
1879-2464
Publisher
Elsevier
Start Page
98
End Page
112
Journal / Book Title
Tribology International
Volume
87
Copyright Statement
© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Engineering, Mechanical
Engineering
Coating
Contact model
Roughness
Multilayered
GRADED MATERIALS
ELASTIC BODIES
COATINGS
SURFACES
MECHANICS
STRESSES
MEDIA
Publication Status
Published