Contact mechanics of a graded layered bearing surface for knee prosthesis

• Autorzy: Virdee S. S. , Jin Z. M.
• Języki publikacji: EN

Abstrakty

EN

Recent studies have shown that a full fluid film lubrication regime can be developed in artificial knee joint replacements under simulated steady-state walking conditions by employing a thin compliant bearing surface with an elastic modulus similar to that of natural articular cartilage (Unsworth et al., 1988); Auger et al., 1993). The compliant bearing surface is usually bonded to a relatively stiff substrate in order to provide the structure support. Due to the abrupt change in stiffness, high interfacial shear strain is developed between the compliant layer and the stiff substrate and de-bonding usually occurs. The de-bonding problem can be expected to be alleviated to a certain extent by using functionally graded materials with variable stiffness. The purpose of this study was to analyze the contact mechanics of these functionally graded materials, with particular reference to knee prostheses. The finite element method was used to predict the contact parameters including the predicted contact pressure at the bearing surfaces and the interfacial shear strain between the compliant layer and the polymeric substrate.

Słowa kluczowe

EN

cushion bearings; contact mechanics; functionally graded materials; knee joint replacements; FEM

PL

materiałoznawstwo; łożysko; proteza stawu kolanowego

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, no 3
• Strony: 1025--1032
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Virdee S. S.

• Department of Mechanical and Medical Engineering University of Bradford, UK

autor

Jin Z. M.

• Department of Mechanical and Medical Engineering University of Bradford, UK

Bibliografia

• [1] Auger D.D., Dowson D., Fisher J. and Jin Z.M. (1993): Friction and lubrication in cushion form bearings for artificial hip joints. - Proc. Instn. Mech. Engrs, Part H, Journal of Engineering in Medicine, vol.207, No.l, pp.25-33.
• [2] Bigsby R.J.A., Auger D.D., Jin Z.M., Dowson D., Hardaker C.S. and Fisher J. (1988): A comparative tribological study of the wear of composite cushion cups in a physiological hip joint simulator. - Journal of Biomechanics, vol.31, pp.363-369.
• [3] Dowson D. and Jin Z.M. (1986): Micro elastohydrodynamic action in the lubrication of synovial joints. - Engng. in Medicine, vol.15, pp.63-65.
• [4] Ingham E. and Fisher J. (2000): Biological reactions to wear debris in total joint replacement. - Journal of Engineering in Medicine, vol.214, No.l, pp.21-37, Professional Engineering Publishing.
• [5] Jin Z.M., Dowson D. and Fisher J. (1991): Stress analysis of cushion form bearings for total hip joint replacements. - Proc. Instn. Mech. Engrs., Part H, Journal of Engineering in Medicine, vol.205, No.2, pp.59-68.
• [6] Stewart T., Jin Z.M. and Fisher J. (1998): Analysis of contact mechanics for composite cushion knee joint replacements. - Proc. Instn. Mech. Engrs., Part H, vol.212, No.l, pp.1-10.
• [7] Suresh S. and Mortensen A. (1998): Fundamentals of functionally graded materials. - IOM Communications, pp.3-11.
• [8] Unsworth A., Percy M.J., White E.F.T. and White G. (1988): Frictional properties of artificial hip joints. - Engng. in Medicine, vol.17, pp. 101-104.