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Tensile Stress Analysis of the Ceramic Head Endoprosthesis with different Micro
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SYSNO ASEP 0353860 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Tensile Stress Analysis of the Ceramic Head Endoprosthesis with different Micro Author(s) Fuis, Vladimír (UT-L) RID, ORCID
Koukal, M. (CZ)Number of authors 2 Source Title XII Mediterranean Conference on Medical and Biological Engineering and Computing 2010. - Chalkidiki : Springer, 2010 - ISSN 1680-0737 - ISBN 978-3-642-13038-0 Pages s. 1-4 Number of pages 4 s. Publication form CD ROM - CD ROM Action Mediterranean Conference on Medical and Biological Engineering and Computing MEDICON 2010 /12./ Event date 27.05.2010-30.05.2010 VEvent location Chalkidiki Country GR - Greece Event type EUR Language eng - English Country DD - DD Keywords hip joint endoprosthesis ; shape deviations ; reliability Subject RIV BO - Biophysics CEZ AV0Z20760514 - UT-L (2005-2011) 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. 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 (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 finite element method – system ANSYS under ISO 7206-5 loading. There are analysed two different groups of micro shape deviations. The first is three variants of the sizes of the measured micro shape deviations (measured,doubled and halved). The second group of the analysed shapes deviations contained modeled deviations with the linear transformation of the measured deviations along the cone depth. 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 2011
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