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"
}