| Autor: |
Mo-nan, WANG, Hong-jing, WANG, Zhi-jiang, DU |
| Předmět: |
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| Zdroj: |
Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban; 2012, Vol. 44 Issue 7, p38-42, 5p |
| Abstrakt: |
To study the influence of thermo property on stress of femur-prosthesis system quantitatively, the finite element method is used to analyze the stress of femur-prosthesis system when the hip joint has been replaced, in which the prosthesis, bone cement and femur are assumed as linear elastic and isotropie materials in shape of a concentric cylinder. Considering the thermal effect, the axial stress of prosthesis, bone cement, femur and the interface shear Stress along axial of the prosthesis/bone cement and bone cement/femur when the prosthesis are made of titanium alloy and cobalt-chromium alloy are acquired separately by mechanical analysis and FEM simulation. The results indicate that the interface failure is the primary failure mode of the femur- prosthesis system. The existence of thermal effect accelerates the interface failure of femur-prosthesis system and the loose of prosthesis stem. The possibility of interface failure which result in operation failure will ascend when the cobalt-chromium alloy is used, because the thermal expansion coefficient of cobalt-chromium alloys is higher than that of titanium alloy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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