Publication result detail

Numerical investigation of stress singularities in cracked bimaterial body

NÁHLÍK, L.; ŠESTÁKOVÁ, L.; HUTAŘ, P.

Original Title

Numerical investigation of stress singularities in cracked bimaterial body

English Title

Numerical investigation of stress singularities in cracked bimaterial body

Type

WoS Article

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.

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

bimaterial interface, stress singularity exponent, corner singularity, vertex singularity, general singular stress concentrator

Key words in English

bimaterial interface, stress singularity exponent, corner singularity, vertex singularity, general singular stress concentrator

Authors

NÁHLÍK, L.; ŠESTÁKOVÁ, L.; HUTAŘ, P.

RIV year

2012

Released

02.07.2008

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Volume

385-387

Number

385-387

State

Swiss Confederation

Pages from

125

Pages to

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 (print)",
  year="2008",
  volume="385-387",
  number="385-387",
  pages="125--128",
  issn="1013-9826"
}