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Vol.11, No3, 2011, pp.189–194 |
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EVALUATION OF THE NOCIVITY OF DENT AND COMBINATION OF DENT AND GOUGE ON BURST PRESSURE OF STEEL PIPE Diego Alvarez1, Alexandre Barbas2, Anne-Sophie Bonnet1, Paul Lipinski1 1) Laboratoire de Mécanique, Biomécanique, Polymère, Structures (LaBPS), Ecole Nationale d’Ingénieurs de Metz – Université Paul Verlaine de Metz, Metz, France 2) Orthopédie Biomécanique Locomotion, Chatillon, France, a.barbas@enim.fr |
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Abstract The design of reliable prosthetic solutions requires wide knowledge of the contact interactions existing inside human joints. Biotribology is of major interest to understand the various mechanisms encountered during this type of contact. The aim of the present work is to propose a new method of experiments and interpretation of the contact existing between bone and a prosthetic material. Firstly, a new tribometer is developed to reproduce this type of contact in vitro, under conditions similar to physiological ones. The experimental tests enabled to quantify bone wear and to determine global interaction forces. Secondly, a rheological model is proposed to identify the frictional and viscous parts of this global interaction force. An example of measurement is detailed in this paper in order to illustrate the fitting of the simulated results to the experimental ones. The values of the rheological parameters corresponding to the best fitting are provided. Thanks to this approach, several conclusions are drawn, allowing to deepen the comprehension of this type of interaction. Keywords: interactions modelling, friction coefficient, friction viscosity, bone wear |
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