Sensitivity Analysis of the Material Parameters of the Ceramics on the Inner Radius of the Hip Joint Endoprosthesis Head

0453639 - ÚT 2016 RIV PL eng C - Conference Paper (international conference)
Fuis, Vladimír - Janíček, Přemysl
Sensitivity Analysis of the Material Parameters of the Ceramics on the Inner Radius of the Hip Joint Endoprosthesis Head.
Advanced Mechatronics Solutions. Warsawa: Springer, 2015 - (Jablonski, R.; Brezina, T.), s. 123-128. Advances in Intelligent Systems and Computing, 393. ISBN 978-3-319-23921-7. ISSN 2194-5357.
[Mechatronics 2015. Varšava (PL), 21.09.2015-13.09.2015]
R&D Projects: GA ČR GA13-34632S
Institutional support: RVO:61388998
Keywords : hip joint endoprosthesis * ceramic head * material parameters * weibull's weakest-link theory * sensitivity analysis
Subject RIV: JH - Ceramics, Fire-Resistant Materials and Glass

The paper globally deals with calculation of the parameters of ceramic material from a set of destruction tests of ceramic heads of total hip joint endoprosthesis. It is not possible to use the standard way to calculate the material parameters, because the specimens cut-outed from the heads are smaller than the norm required (the material parameters derived from them would exhibit higher strength values than those which the given ceramic material really has). On that score, a special testing jig was made, in which 40 heads were destructed. From the measured values of circumferential strains of the head’s external spherical surface under destruction, the state of stress in the head under destruction was established using the final elements method (FEM). From the values obtained, the sought for parameters of the ceramic material were calculated using Weibull’s weakest-link theory. The analysis of the sensitivity of the obtained material parameters on the value of the inner radius in the head’s hole is realized in detail.
Permanent Link: http://hdl.handle.net/11104/0254430