The paper employs a rough-surface numerical elastic contact method designed to analyze Hertzian elastic contact effects of surface coatings. In particular the paper explores the differences in the surface contact mechanics and the resulting sub-surface stresses experienced over a range of differing coating material-properties, thickness, and machined roughness levels in a quantitative manner. The effect of a range of surface roughness properties and in particular root mean square roughness (σ) and correlation length on the magnitude and depth of maximum shear stresses in the layer under individual asperities is investigated. This is done for a hard and stiff, and also for a soft and compliant coating, and for two coating thicknesses in each case. The results suggest that the magnitude of the local shear stress increases with increasing ratio approximately linearly. The depth of the maximum local shear stress is found to correlate best with however a further clear trend is observed between this depth and the number of profile peaks. The depth also shows a relation to the ratio but the correlation in this case is weaker with significant deviations. Neither the magnitude nor the depth of shear stresses shows any significant trend in relation to the roughness (σ) alone. The tensile stresses at the interface, and the subsequent potential for delamination, are also investigated and found to be significant. Approximate correlation between the magnitude of interface tensile stress and root mean square roughness is achieved, but no clear trend in relation to correlation length is evident.
Skip Nav Destination
Article navigation
October 2003
Technical Papers
A Numerical Study of the Contact Mechanics and Sub-Surface Stress Effects Experienced Over a Range of Machined Surface Coatings in Rough Surface Contacts
A. Kadiric,
A. Kadiric
Tribology Section, Department of Mechanical Engineering, Imperial College, London, SW7 2BX, UK
Search for other works by this author on:
R. S. Sayles,
R. S. Sayles
Tribology Section, Department of Mechanical Engineering, Imperial College, London, SW7 2BX, UK
Search for other works by this author on:
Xiao Bo Zhou,
Xiao Bo Zhou
SKF Engineering and Research Centre BV, 3430 DT Nieuwegein, The Netherlands
Search for other works by this author on:
E. Ioannides
E. Ioannides
SKF Engineering and Research Centre BV, 3430 DT Nieuwegein, The Netherlands
Search for other works by this author on:
A. Kadiric
Tribology Section, Department of Mechanical Engineering, Imperial College, London, SW7 2BX, UK
R. S. Sayles
Tribology Section, Department of Mechanical Engineering, Imperial College, London, SW7 2BX, UK
Xiao Bo Zhou
SKF Engineering and Research Centre BV, 3430 DT Nieuwegein, The Netherlands
E. Ioannides
SKF Engineering and Research Centre BV, 3430 DT Nieuwegein, The Netherlands
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division July 31, 2001 revised manuscript received December 18, 2002. Associate Editor: T. C. Ovaert.
J. Tribol. Oct 2003, 125(4): 720-730 (11 pages)
Published Online: September 25, 2003
Article history
Received:
July 31, 2001
Revised:
December 18, 2002
Online:
September 25, 2003
Citation
Kadiric , A., Sayles, R. S., Zhou , X. B., and Ioannides, E. (September 25, 2003). "A Numerical Study of the Contact Mechanics and Sub-Surface Stress Effects Experienced Over a Range of Machined Surface Coatings in Rough Surface Contacts ." ASME. J. Tribol. October 2003; 125(4): 720–730. https://doi.org/10.1115/1.1574520
Download citation file:
Get Email Alerts
Environmentally Friendly MoS2-hBN Solid Lubricants: A Comprehensive Tribological Evaluation
J. Tribol (April 2025)
Machine Learning in Wear Prediction
J. Tribol (April 2025)
Static Characteristics of Hybrid Water-Lubricated Herringbone Groove Journal Bearing
J. Tribol (April 2025)
Related Articles
Extending the Capability of the Greenwood Williamson Microcontact Model
J. Tribol (July,2000)
Influence of a Hard Surface Layer on the Limit of Elastic Contact—Part II: Analysis Using a Modified GW Model
J. Tribol (October,2002)
Static Friction Modeling in the Presence of Soft Thin Metallic Films
J. Tribol (January,2002)
Mode II Edge Delamination of Compressed Thin Films
J. Appl. Mech (September,2001)
Related Proceedings Papers
Related Chapters
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Technical Overview on Mechanical and Physical Property Measurements on Coatings
Testing of Metallic and Inorganic Coatings
Analysis of Interlaminar Stresses in Thick Composite Laminates With and Without Edge Delamination
Delamination and Debonding of Materials