Formulation of a three-dimensional, quasi-static lubrication model of an artificial hip joint is proposed which includes the inclination angle of the acetabular cup. This is performed by deriving a transformed Reynolds equation accounting for this cup tilt angle. The numerical simulation also addresses mass conservation at the location of film rupture. A 3-D spherical representation of the articulating surfaces of the hip prosthesis is mapped onto a cartesian coordinate system of the entire geometry of the “ball and socket” joint. Results include the lubricating fluid pressure distributions for various inclination angles of the acetabular cup demonstrating that the greatest pressures occur for large eccentricities in the upward vertical direction.
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July 1999
Research Papers
Lubrication Model of an Artificial Hip Joint: Pressure Profile Versus Inclination Angle of the Acetabular Cup
Donna M. Meyer,
Donna M. Meyer
Department of Mechanical Engineering, Aerospace Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180
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John A. Tichy
John A. Tichy
Department of Mechanical Engineering, Aerospace Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180
Search for other works by this author on:
Donna M. Meyer
Department of Mechanical Engineering, Aerospace Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180
John A. Tichy
Department of Mechanical Engineering, Aerospace Engineering and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180
J. Tribol. Jul 1999, 121(3): 492-498 (7 pages)
Published Online: July 1, 1999
Article history
Received:
January 23, 1998
Revised:
July 9, 1998
Online:
January 24, 2008
Citation
Meyer, D. M., and Tichy, J. A. (July 1, 1999). "Lubrication Model of an Artificial Hip Joint: Pressure Profile Versus Inclination Angle of the Acetabular Cup." ASME. J. Tribol. July 1999; 121(3): 492–498. https://doi.org/10.1115/1.2834094
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