Publication detail
Stress analysis of Burch-Schneider cage
ŘEHÁK, K. FLORIAN, Z. KRPALEK, D. MARCIÁN, P. MATUG, M. VALÁŠEK, J.
Czech title
Napěťová analýzy Burch-Schneiderovy dlahy
English title
Stress analysis of Burch-Schneider cage
Type
conference paper
Language
en
Original abstract
This article deals with the stress analysis of the Burch-Schneider cage as applied to a hip joint. Due to the complex geometry of the solved problem, material properties and complex boundary condition, the finite element method was chosen. The solved system consists of the pelvic bone, a part of the os sacrum, a polyethylene cup and ceramic heads. In this work a poor-quality cancellous bone was given by the value of the modulus of elasticity is modelled. Furthermore, two model types are considered in this study a model with degraded mechanical properties of the cancellous bone, which does not worsen due to stress, whereas the other model shows a case of bone necrosis due to stress. Load was applied to the ceramic head in the direction of the resultant butt force, which had been determined by the resultant forces. The analysis of the results indicates that in the model variant with the necrotic bone tissue of such an extent that was considered, damage may occur due to the cyclical loading. However, in the variant with degraded mechanical properties, which are not deteriorating due to stress anymore, the limit state does not occur.
Czech abstract
Článek se zabývá deformačně napěťovou analýzu Burch-Schneiderovy dlahy aplikované do kyčelního spojení. Z důvodu složité geometrii řešené úlohy, materiálovým vlastnostem a složitým okrajovým podmínkám, byla pro řešení zvolena metoda konečných prvků. Řešená soustava se skládá z pánevní kosti,části kosti křížové, polyethylenové jamky a keramické hlavice. V práci je modelována zhoršená kvalita spongiosní kostní tkaně velikostí modulu pružnosti v tahu. Dále jsou v této práci uvažovány dva druhy modelu a to model se zhoršenými mechanickými vlastnostmi spongiosní kosní tkáně, která se v důsledku namáhání u první varianty nezhoršuje, u druhé varianty je namodelován případ nekrózy kostní tkáně v důsledku namáhání. Zatížení bylo aplikováno na keramickou hlavici ve směru výsledné stykové síly, která byla určena na úrovni silových výslednic. Z analýzy výsledků výplývá, že u variant s nekrozou kostní tkáně v takovém rozsahu, jež byl uvažován může dojít k porušení v důsledku cyklického namáhání. U varianty se zhoršenými mechanickými vlastnostmi, které se v důsledku namáhání již nezhoršují, k meznímu stavu nedojde.
English abstract
This article deals with the stress analysis of the Burch-Schneider cage as applied to a hip joint. Due to the complex geometry of the solved problem, material properties and complex boundary condition, the finite element method was chosen. The solved system consists of the pelvic bone, a part of the os sacrum, a polyethylene cup and ceramic heads. In this work a poor-quality cancellous bone was given by the value of the modulus of elasticity is modelled. Furthermore, two model types are considered in this study a model with degraded mechanical properties of the cancellous bone, which does not worsen due to stress, whereas the other model shows a case of bone necrosis due to stress. Load was applied to the ceramic head in the direction of the resultant butt force, which had been determined by the resultant forces. The analysis of the results indicates that in the model variant with the necrotic bone tissue of such an extent that was considered, damage may occur due to the cyclical loading. However, in the variant with degraded mechanical properties, which are not deteriorating due to stress anymore, the limit state does not occur.
Keywords in Czech
Burch-Schneiderova dlaha, kyčelní kloub, metoda konečných prvků, deformačně napěťová analýza.
Keywords in English
Burch-Schneider cage, hip joint, Finite element method, stress-strain analysis.
RIV year
2011
Released
09.05.2011
Publisher
Institute of Thermomechanics
Location
Prague
ISBN
978-80-87012-33-8
Book
Engineering Mechanics 2011, 17th International Conference
Edition number
2011
Pages from–to
523–526
Pages count
4
BIBTEX
@inproceedings{BUT72809,
author="Kamil {Řehák} and Zdeněk {Florian} and David {Krpalek} and Petr {Marcián} and Michal {Matug} and Jiří {Valášek},
title="Stress analysis of Burch-Schneider cage",
booktitle="Engineering Mechanics 2011, 17th International Conference",
year="2011",
month="May",
pages="523--526",
publisher="Institute of Thermomechanics",
address="Prague",
isbn="978-80-87012-33-8"
}