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Tensile stress analysis of the ceramic head with micro and macro shape deviations of the contact areas
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SYSNO ASEP 0335146 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Tensile stress analysis of the ceramic head with micro and macro shape deviations of the contact areas Title Analýza tahové napjatosti v keramické hlavici s mikro a makro tvarovými odchylkami kontaktních ploch Author(s) Fuis, Vladimír (UT-L) RID, ORCID Source Title Recent Advances in Mechatronics 2008-2009. - Berlin : Springer, 2009 / Brezina T. ; Jablonski R. - ISBN 978-3-642-05021-3 Pages s. 425-430 Number of pages 6 s. Action Mechatronics 2009 Event date 18.11.2009-20.11.2009 VEvent location Luhačovice Country CZ - Czech Republic Event type EUR Language eng - English Country DE - Germany Keywords shape deviations ; hip joint endoprosthesis ; computational modelling Subject RIV BO - Biophysics CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000277076900072 Annotation 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 elasto-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. There are analysed three variants of the sizes of the measured micro shape deviations (measured, doubled and halved). The problem of stress in ceramic heads was solved using the finite element method – system ANSYS under ISO 7206-5 loading. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
Number of the records: 1