Detail publikace

Vliv rohové singularity na tvar únavové trhliny

HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z. SEITL, S.

Český název

Vliv rohové singularity na tvar únavové trhliny

Anglický název

The influence of vertex singularities on fatigue crack shape

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

en

Originální abstrakt

Due to the existence of vertex singularity at the point where the crack intersects the free surface, stress distribution around the crack tip and the type of the singularity is changed. In the interior of the specimen the classical singular behaviour of the crack is dominant and can be described using generally known analytic equations. Contrary to this, at the free surface or in the boundary layer close to the free surface the vertex singularity is significant. The influence of vertex singularity on crack behaviour and crack shape for a three-dimensional structure is described in this paper. To estimate the influence of the free surface on fatigue crack growth rate the model of a general singular stress concentrator was applied. Using this concept of the generalized stress intensity factor it is possible to estimate the behaviour of a crack with general singular stress field. The estimated fatigue crack shape can help to provide a more reliable estimation of the fatigue life of the structures considered.

Český abstrakt

Diky existenci rohové singularity v místě, kde se protíná čelo trhliny s volným povrchem, rozdělení napětí a typ singularity se mění. Tato změna se dá postihnout pomocí zobecněné lomové mechaniky a popsat tak změny rychlosti šíření únavové trhliny pomocí zobecněného faktoru intenzity napětí. Pomocí tohoto konceptu lze odhadnout i výsledný tvar únavové trhliny.

Anglický abstrakt

Due to the existence of vertex singularity at the point where the crack intersects the free surface, stress distribution around the crack tip and the type of the singularity is changed. In the interior of the specimen the classical singular behaviour of the crack is dominant and can be described using generally known analytic equations. Contrary to this, at the free surface or in the boundary layer close to the free surface the vertex singularity is significant. The influence of vertex singularity on crack behaviour and crack shape for a three-dimensional structure is described in this paper. To estimate the influence of the free surface on fatigue crack growth rate the model of a general singular stress concentrator was applied. Using this concept of the generalized stress intensity factor it is possible to estimate the behaviour of a crack with general singular stress field. The estimated fatigue crack shape can help to provide a more reliable estimation of the fatigue life of the structures considered.

Klíčová slova česky

rohová singularita, únavová trhlina, zobecněný součinitel intenzity napětí

Klíčová slova anglicky

vertex singularity, fatigue crack, generalized stress intensity factor

Rok RIV

2008

Vydáno

02.09.2008

Nakladatel

VUTIUM

Místo

Brno

ISBN

9781617823190

Kniha

ECF17 - European Conference on Fracture 17

Strany od–do

1060–1066

Počet stran

7

BIBTEX


@inproceedings{BUT30082,
  author="Pavel {Hutař} and Luboš {Náhlík} and Zdeněk {Knésl} and Stanislav {Seitl},
  title="The influence of vertex singularities on fatigue crack shape",
  booktitle="ECF17 - European Conference on Fracture 17",
  year="2008",
  month="September",
  pages="1060--1066",
  publisher="VUTIUM",
  address="Brno",
  isbn="9781617823190"
}