Publication detail

Fracture mechanics of the three-dimensional crack front: vertex singularity versus out of plain constraint descriptions

HUTAŘ, P. ŠEVČÍK, M. NÁHLÍK, L. ZOUHAR, M. SEITL, S. KNÉSL, Z. FERNÁNDEZ-CANTELI, A.

Czech title

Lomová mechanika trojdimenzionálního čela trhliny: popis pomocí hranové singularity versus out of plain constrain

English title

Fracture mechanics of the three-dimensional crack front: vertex singularity versus out of plain constraint descriptions

Type

journal article - other

Language

en

Original abstract

The effect of a free surface on stress distribution along the three-dimensional crack front is discussed. Generalized stress intensity factor methodology and out-of-plane constraint based procedure are used for a reliable estimation of the stress state in front of the crack tip. The two present methodologies are discussed and compared. The out-of plane, in-plane constraint parameters and generalized stress intensity factor were estimated. It is shown significant changes of the singularity exponents and fracture parameters values close to the free surface. Therefore, conventional methodologies can lead to inaccurate description of the stress state and cannot be used for reliable description of fatigue crack propagation in this area.

Czech abstract

Práce se zabývá studiem rozložení napětí v blízkosti volného povrchu a jeho popisem pomocí různých semi-analytických metod. Studované postupy jsou: jednoparametrová a dvouparametrová lomová mechanika a také postup využívající zobecněný součinitel intenzity napětí pro popis napjatosti v místech kde není exponent singularity napětí roven 0,5.

English abstract

The effect of a free surface on stress distribution along the three-dimensional crack front is discussed. Generalized stress intensity factor methodology and out-of-plane constraint based procedure are used for a reliable estimation of the stress state in front of the crack tip. The two present methodologies are discussed and compared. The out-of plane, in-plane constraint parameters and generalized stress intensity factor were estimated. It is shown significant changes of the singularity exponents and fracture parameters values close to the free surface. Therefore, conventional methodologies can lead to inaccurate description of the stress state and cannot be used for reliable description of fatigue crack propagation in this area.

Keywords in Czech

in-plain constraint, out of plain constraint, hranová singularita, lineárně elastické lomová mechanika

Keywords in English

in-plain constraint, out of plain constraint, vertex-singularity, linear elastic fracture mechanics

RIV year

2010

Released

15.03.2010

Publisher

Elsevier Ltd.

ISSN

1877-7058

Journal

Procedia Engineering

Volume

2

Number

1

Pages from–to

2095–2102

Pages count

8

BIBTEX


@article{BUT47310,
  author="Pavel {Hutař} and Martin {Ševčík} and Luboš {Náhlík} and Michal {Zouhar} and Stanislav {Seitl} and Zdeněk {Knésl} and Alfonso Fernández {Canteli},
  title="Fracture mechanics of the three-dimensional crack front: vertex singularity versus out of plain constraint descriptions",
  journal="Procedia Engineering",
  year="2010",
  volume="2",
  number="1",
  month="March",
  pages="2095--2102",
  publisher="Elsevier Ltd.",
  issn="1877-7058"
}