Tribology Letters

, Volume 23, Issue 1, pp 55–63 | Cite as

A novel test rig for in situ and real time optical measurement of the contact area evolution during pre-sliding of a spherical contact

  • A. Ovcharenko
  • G. Halperin
  • I. Etsion
  • M. Varenberg
Article

An experimental test rig was developed in order to investigate elastic–plastic single micro-spherical contact under combined normal and tangential loading. This novel apparatus allows in situ and real time direct optical measurement of the real contact area (RCA) evolution in pre-sliding. It also allows relative displacement measurements under very low rates of tangential loading (down to 0.01 N/s) to capture accurately the fine details at sliding inception. This is achieved by piezoelectric actuation in closed loop feedback control in addition to synchronization with data and image acquisition to obtain real time measurement. The RCA measurement is realized by direct optical observation technique, whereas two different image processing algorithms were implemented for the elastic and the elastic–plastic contact regimes. The various features and capabilities of the test rig are presented along with some preliminary experimental results of RCA and friction behavior to assess its performance.

Keywords

spherical contact elastic–plastic contact real contact area in situ real time measurement image processing 

References

  1. 1.
    P.W. O’Callaghan, S.D. Probert, (1987) Wear 120: 29–49CrossRefGoogle Scholar
  2. 2.
    K.L. Woo, T.R. Thomas, (1980) Wear 58: 331–340CrossRefGoogle Scholar
  3. 3.
    B. Bushan, (1985) ASLE Trans. 28: 75–86Google Scholar
  4. 4.
    J. Cortney-Prat, E. Eisner, (1957) R. Soc. Lond. 238A: 529–549CrossRefGoogle Scholar
  5. 5.
    F. Aymerich, M. Pau, (2004) J. Tribol. 126: 639–645CrossRefGoogle Scholar
  6. 6.
    M. Pau, F. Aymerich, F. Ginesu, (2002) Wear 253: 265–274CrossRefGoogle Scholar
  7. 7.
    R. Dwyer-Joyce, B. Drinkwater, (2003) Tribol. Lett. 14: 41–52CrossRefGoogle Scholar
  8. 8.
    R. Parker, D. Hatch, (1950) Proc. Phys. Soc. (Lond.) B63: 185–197Google Scholar
  9. 9.
    M. Chaudhri, (1981) Philos. Magaz. A 44: 667–675CrossRefGoogle Scholar
  10. 10.
    M. Chaudhri, I. Hutchings, P. Makin, (1984) Philos. Magaz. A 49: 493–503CrossRefGoogle Scholar
  11. 11.
    K. Tanaka, (1984) Wear 100: 243–262CrossRefGoogle Scholar
  12. 12.
    C. Constantinou, M. Chaudhri, (1989) J. Mater. Sci. 24: 4279–4292CrossRefGoogle Scholar
  13. 13.
    E. Diaconescu, M. Glovnea, Evaluation of contact area by reflectivity 3rd Aimeta International Tribology Conference, Italy 2002Google Scholar
  14. 14.
    S. Lo, S. Tsai, (2002) J. Tribol. 124: 229–238CrossRefGoogle Scholar
  15. 15.
    K. Adachi, K. Kato, J. Liu, and H. Kawamura, The effect of contact morphology on initiation and propagation of micro-slip at contact interface ASME/STLE International Joint Tribology Conference, California USA 2004Google Scholar
  16. 16.
    A. Azushima, S. Kuba, S. Tani, D. Olsson, (2006) Wear 260: 258–264CrossRefGoogle Scholar
  17. 17.
    T. Klinger, Image Processing with LabVIEW™ IMAQ™ Vision (Prentice Hall PTR, 2003)Google Scholar
  18. 18.
    L. Kogut, I. Etsion, (2002) J. Appl. Mech. Trans. ASME 69: 657–662CrossRefGoogle Scholar
  19. 19.
    S. Timoshenko and J. Goodier, Theory of Elasticity 3rd ed. (McGraw-Hill, New York, 1970)Google Scholar
  20. 20.
    I. Etsion, O. Levinson, G. Halperin, M. Varenberg, (2005) J. Tribol. 127-1: 47–50CrossRefGoogle Scholar
  21. 21.
    D. Tabor, (1959) Proc. R. Soc. A 251: 378CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • A. Ovcharenko
    • 1
  • G. Halperin
    • 1
  • I. Etsion
    • 1
  • M. Varenberg
    • 2
  1. 1.Mechanical Engineering DepartmentTechnionHaifa Israel
  2. 2.Max Planck Institute for Metals ResearchStuttgart Germany

Personalised recommendations