Detail publikace
Numericke určení singularit napětí v bi-materiálovém tělese s trhlinou
NÁHLÍK, L. ŠESTÁKOVÁ, L. HUTAŘ, P.
Český název
Numericke určení singularit napětí v bi-materiálovém tělese s trhlinou
Anglický název
Numerical investigation of stress singularities in cracked bimaterial body
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Composite materials or generally materials with interfaces are nowadays used in many varied engineering applications. In comparison with classical engineering materials the existence of material interface causes locally different stress distribution, which can strongly influence behaviour of whole structure and can have an important influence on failure mechanisms of such materials. The paper presented is devoted to the investigation of stress singularity exponents of a crack growing in a bimaterial body perpendicularly to the interface and touching the material interface. Discrepancies between value of stress singularity exponent in the centre of bimaterial body and on the free surface were found. The assumptions of linear elastic fracture mechanics (LEFM) and small scale yielding (SSY) are considered. For numerical calculations finite element analysis was used. Results obtained can contribute to a better understanding of failure of materials with interfaces.
Český abstrakt
Použití materiálů s rozhraními v praxi je čím dál častější. Přítomnost rozhraní významně ovlivňuje rozložení napětí v tělese. Článek je věnován určování exponentů singularity pro trhlinu kolmou a končící na bi-materiálovém rozhraní. Studovány jsou především rozdíly mezi povrchem tělesa a jeho středem, a to pomocí metody konečných prvků.
Anglický abstrakt
Composite materials or generally materials with interfaces are nowadays used in many varied engineering applications. In comparison with classical engineering materials the existence of material interface causes locally different stress distribution, which can strongly influence behaviour of whole structure and can have an important influence on failure mechanisms of such materials. The paper presented is devoted to the investigation of stress singularity exponents of a crack growing in a bimaterial body perpendicularly to the interface and touching the material interface. Discrepancies between value of stress singularity exponent in the centre of bimaterial body and on the free surface were found. The assumptions of linear elastic fracture mechanics (LEFM) and small scale yielding (SSY) are considered. For numerical calculations finite element analysis was used. Results obtained can contribute to a better understanding of failure of materials with interfaces.
Klíčová slova česky
bi-materiálové rozhraní, exponent singularity napětí, rohová singularita, obecný singulární koncentrátor napětí
Klíčová slova anglicky
bimaterial interface, stress singularity exponent, corner singularity, vertex singularity, general singular stress concentrator
Rok RIV
2008
Vydáno
02.07.2008
Nakladatel
Trans Tech Publications
Místo
Switzerland
ISSN
1013-9826
Časopis
Key Engineering Materials
Ročník
385-387
Číslo
385-387
Strany od–do
125–128
Počet stran
4
BIBTEX
@article{BUT48865,
author="Luboš {Náhlík} and Lucie {Malíková} and Pavel {Hutař},
title="Numerical investigation of stress singularities in cracked bimaterial body",
journal="Key Engineering Materials",
year="2008",
volume="385-387",
number="385-387",
month="July",
pages="125--128",
publisher="Trans Tech Publications",
address="Switzerland",
issn="1013-9826"
}