The Effect of Dynamic Loading on Stresses Induced in Charnley Hip Prosthesis
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Abstract
This study produces an image of theoretical and experimental case of high loading stumbling condition for hip prosthesis. Model had been studied namely Charnley. This model was modeled with finite element method by using ANSYS software, the effect of changing the design parameters (head diameter, neck length, neck ratio, stem length) on Charnley design, for stumbling case as impact load where the load reach to (8.7* body weight) for impact duration of 0.005sec.An experimental rig had been constructed to test the hip model, this rig consist of a wood box with a smooth sliding shaft where a load of 1 pound is dropped from three heights.
The strain produced by this impact is measured by using rosette strain gauge connected to Wheatstone bridge for the model .The signal is amplified and sent forward to a data acquisition and then saved in the connected laptop. From this study it is found that the changing in stem length had large effect on effective stress where the change in effective stress while stem length increased from (110mm to 140mm) was not more than (209MPa).
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References
A. Zafer Senalp , Oguz Kayabasi, Hasan Kurtaran, 2007, Static and Dynamic and Fatigue Behavior of Newly Designed Stem Shapes for Hip Prosthesis Using Finite Element Analysis, Materials and Design, vol.28, No.4 pp. 1577–1583.
Chan-tsungyang, hung-wen wei,hung-and chankao,cheng-kung cheng, 2009, Design and Test of Hip Stem or Medullary Revascularization, Medical Engineering and Physics, vol.21, No.3 ,pp.994-1001.
H.F. El’Sheikh, B.J. MacDonald, M.S.J. Hashmi, 2003, Finite Element Simulation of The Hip Joint During Stumbling: a Comparison Between Static and Dynamic Loading, Journal of Materials Processing Technology vol.144, No. 2, pp. 249–255.
Mamdouh M. Monif, 2012, Finite Element Study on The Predicted Equivalent Stresses in The Artificial Hip Joint , IVSL/ J. Biomedical Science and Engineering, vol.5, No.2, pp.43-51.
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