Paper Title:
Minimizing Stress Concentrations in the Femoral Heads of Hip Joint Prostheses: Effect of Borehole Shapes
  Abstract

This paper presents a stress analysis of the ceramic femoral heads of hip joint prostheses with different borehole shapes to evaluate their mechanical reliability in terms of stress concentration. Under the ideal loading conditions used for ceramic rupture tests specified by the ISO 7206-5 standard, a finite element (FE) modeling is performed to determine the tensile and hoop stress distributions in the ceramic femoral heads. Two borehole shapes that are currently used in the manufacturing industry for hip joint prostheses, namely the flat bottom and keyhole, were first studied. Two new borehole shapes, dome arc and dome ellipse, were then introduced by the authors in the paper to minimize the stress concentration. It was found that while the currently used borehole shapes lead to high tensile notch stresses at their critical corners causing possible fracture failure of ceramic heads, the authors’ borehole designs can improve the mechanical reliability significantly. In addition, the effects of taper-bore contact length and their interface friction are investigated and discussed.

  Info
Periodical
Edited by
Jun Wang,Philip Mathew, Xiaoping Li, Chuanzhen Huang and Hongtao Zhu
Pages
736-741
DOI
10.4028/www.scientific.net/KEM.443.736
Citation
M. S. Uddin, L. C. Zhang, "Minimizing Stress Concentrations in the Femoral Heads of Hip Joint Prostheses: Effect of Borehole Shapes", Key Engineering Materials, Vol. 443, pp. 736-741, 2010
Online since
June 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shan Yong Wang, S.K. Au, K.C. Lam, Chun An Tang
Abstract:Borehole breakout is the process by which portions of borehole or tunnel wall fracture or spall when subjected to compressive stresses. The...
2605
Authors: Vladimir Brailovski, Patrick Terriault, Charles Simoneau, Mathieu Dumas, Bruno Jetté
Chapter 2: Contributed Papers
Abstract:In this communication, a new methodological approach is proposed to develop a biomimetic metallic femoral stem. The design of this stem...
1788