Original title: Stress Analysis of the Ceramics Head with Micro and Macro Shape Deviations of the Contact Areas
Translated title: Napjatostní analýza keramické hlavice totální kyčelní endorpotézy s mikro a makro tvaovými odchylkami
Authors: Fuis, Vladimír ; Hlavoň, Pavel
Document type: Papers
Conference/Event: Human Biomechanics 2008, Praha (CZ), 2008-09-29 / 2008-10-01
Year: 2008
Language: eng
Abstract: [eng] [cze]
The paper deals with the problems of ceramic head of hip joint endoprosthesis destructions in vivo, and with assessing the impact of shape deflections of conical surfaces on the tensile stress in the head. There are assumed two material characteristics of the stem – the first is linear elastic and the second is bilinear plastic modelled austenitic steel used in the bio-implants. Concerned are shape deviations from the ideal conical surfaces of the stem and the head of the endoprosthesis. The shape deviations may be modelled at the macro-level - this concerns model shape inaccuracies such as deviation from the nominal degree of taper, at the micro-level - when the stochastic distribution of unevenness on the contact areas is respected. The problem of stress in ceramic heads was solved using the algorithm of the finite element method – system ANSYS under ISO 7206-5 loading. Příspěvek se zabývá vlivem materiálu dříku na napjatost v hlavici totální kyčelní endoprotézy s mikro a makro tvarovými odchylkami.
Keywords: hip joint endoprosthesis; shape deviations
Project no.: CEZ:AV0Z20760514 (CEP)
Host item entry: Human Biomechanics 2008, ISBN 978-80-01-04163-5

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0165317

Permalink: http://www.nusl.cz/ntk/nusl-39395


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers