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"
}