Detail publikace

Stress and reliability analyses of damaged ceramic femoral heads

FUIS, V. JANÍČEK, P.

Originální název

Stress and reliability analyses of damaged ceramic femoral heads

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Today, the problem of reliability of the hip joint ceramic heads becomes important, since world-wide the destruction of the ceramic head has generally been stated in a non-negligible number of patients. Therefore stress and reliability analyses of the ceramic heads were made using experimental and computational modelling aimed at finding the causes of the head destruction. The deformation and stresses are obtained by computational methods (finite elements) under testing conditions, in accordance with ISO 7206-5. Head reliability is based on the Weibull weakest link theory. The head's stress and reliability are significantly influenced by manufacturing inaccuracies of the cone contact areas. The considered manufacturing inaccuracies are modelled as axisymmetric or 3D. The effects of manufacturing inaccuracies on the head's hoop stress and the head's contact pressure along the contact taper are analysed in detail, because the maximum tensile stress acts in this region. Finally, the effect of the mentioned manufacturing inaccuracies on the head's failure probability during the loading is shown. The results obtained are used in clinical practice and in the technological processes of stem and ceramic head manufacturing.

Klíčová slova v angličtině

Damages femoral heads, computaional modelling, Production inaccuracies

Autoři

FUIS, V.; JANÍČEK, P.

Rok RIV

2002

Vydáno

15. 10. 2002

Nakladatel

WIT Press, UK

Místo

Southampton

ISBN

1-85312-926-7

Kniha

Damage and Fracture Mechanics VII

Strany od

475

Strany do

485

Strany počet

11

BibTex

@inproceedings{BUT5464,
  author="Vladimír {Fuis} and Přemysl {Janíček}",
  title="Stress and reliability analyses of damaged ceramic femoral heads",
  booktitle="Damage and Fracture Mechanics VII",
  year="2002",
  pages="11",
  publisher="WIT Press, UK",
  address="Southampton",
  isbn="1-85312-926-7"
}