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- W2023490300 abstract "A finite element model of the ceramic hip endoprosthesis system is established with ABAQUS 6.7. The generation mechanism of squeaking is studied using the complex eigenvalue method which allows for a stability analysis of the system under friction coupling. Numerical results reveal that a ceramic hip endoprosthesis system has a strong propensity of unstable vibration when the friction coefficient of ceramic bearings reaches to a critical value, which is considered to be the most likely mechanism for squeaking. In the present study μ = 0.15 is proved to be a critical value, below which there is no instability of the system. Furthermore, the resonance of the femoral components at a frequency of 3177 Hz is found to be the source of the unstable vibration in squeaking. On the basis of the etiology of squeaking, two methods for suppressing squeaking are proposed. One method is adding ultra-high molecular weight polyethylene (UHMWPE) damping material in acetabular components, the other is imposing reasonable fixed stiffness on acetabular components. Simulation results show that both methods are effective for increasing the critical friction coefficient from 0.15 to 0.22 and 0.32, respectively, which improve the stability of the ceramic hip endoprosthesis system to a great extent." @default.
- W2023490300 created "2016-06-24" @default.
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- W2023490300 date "2011-07-01" @default.
- W2023490300 modified "2023-09-28" @default.
- W2023490300 title "Analysis of squeaking on ceramic hip endoprosthesis using the complex eigenvalue method" @default.
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- W2023490300 doi "https://doi.org/10.1016/j.wear.2010.12.024" @default.
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