Calculation of the Ceramic Material Parameters from the Destructions

0335302 - ÚT 2010 RIV BR eng A - Abstrakt
Fuis, Vladimír - Houfek, Martin
Calculation of the Ceramic Material Parameters from the Destructions.
11th International Conference on Advanced Materials. Rio de Janeiro: SBPMat, 2009. s. 1-1. ISSN 1983-7542.
[ICAM 2009. 20.09.2009-25.09.2009, Rio de Janeiro]
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: weibull * material parameters * destruction tests
Kód oboru RIV: BO - Biofyzika
http://www.icam2009.com/

The paper deals with calculation of the parameters of ceramic material from a set of destruction tests of ceramic heads of total hip joint endoprostheses. The standard way of calculation of the material parameters consists in carrying out a set of 3 or 4 point bending tests of specimens cut out from parts of the ceramic material to be analysed. In case of ceramic heads, it is not possible to cut out specimens of required dimensions because the heads are too small. 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.
Trvalý link: http://hdl.handle.net/11104/0179807