Publication detail

CALCULATION OF THE CERAMICS MATERIAL PARAMETERS FROM THE TESTING DESTRUCTIONS OF THE HEADS

FUIS, V., HLAVOŇ, P., NÁVRAT, T.

Original Title

CALCULATION OF THE CERAMICS MATERIAL PARAMETERS FROM THE TESTING DESTRUCTIONS OF THE HEADS

Type

conference paper

Language

English

Original Abstract

This paper deals with increasing of the computation modelling level of the reliability problem of ceramic heads of total hip joint endoprostheses. The solution to this problem was invoked by recent more frequent failures of these heads in clinical practice. Results of computational and experimental modelling have shown a substantial influence of shape deviations in the conical connection between stem and head on the initiation of ceramic head fractures. The fracture probability was evaluated step by step for various macroscopic shape deviations in the conical connection and then for microscopic shape deviations superposed on the macroscopic deviations. The solution to the problem of ceramic head reliability requires realization of two computational models: one for determination of stress states and another one for evaluation of the fracture probability. Material characteristics of ceramics used in fracture probability evaluation have been determined by a three-point-bending test till now. Within the framework of this paper is that the characteristics will be determined by destruction tests of ceramic heads and they will be used as new input data in the computational variants realized till now.

Key words in English

Weibul weakest-link theory, material parameters, ceramics, FEM analysis

Authors

FUIS, V., HLAVOŇ, P., NÁVRAT, T.

RIV year

2006

Released

15. 5. 2006

Publisher

ÚTAM AV ČR

Location

Svratka

ISBN

80-86246-27-2

Book

Engineering Mechanics 2006

Pages from

76

Pages to

77

Pages count

2

BibTex

@inproceedings{BUT19529,
  author="Vladimír {Fuis} and Pavel {Hlavoň} and Tomáš {Návrat}",
  title="CALCULATION OF THE CERAMICS MATERIAL PARAMETERS FROM THE TESTING DESTRUCTIONS OF THE HEADS",
  booktitle="Engineering Mechanics 2006",
  year="2006",
  pages="2",
  publisher="ÚTAM AV ČR",
  address="Svratka",
  isbn="80-86246-27-2"
}