Publication detail
Numerical investigation of stress singularities in cracked bimaterial body
NÁHLÍK, L. ŠESTÁKOVÁ, L. HUTAŘ, P.
Czech title
Numericke určení singularit napětí v bi-materiálovém tělese s trhlinou
English title
Numerical investigation of stress singularities in cracked bimaterial body
Type
journal article in Web of Science
Language
en
Original abstract
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.
Czech abstract
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.
English abstract
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.
Keywords in Czech
bi-materiálové rozhraní, exponent singularity napětí, rohová singularita, obecný singulární koncentrátor napětí
Keywords in English
bimaterial interface, stress singularity exponent, corner singularity, vertex singularity, general singular stress concentrator
RIV year
2008
Released
02.07.2008
Publisher
Trans Tech Publications
Location
Switzerland
ISSN
1013-9826
Journal
Key Engineering Materials
Volume
385-387
Number
385-387
Pages from–to
125–128
Pages count
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"
}