Detail publikace
Lomová mechanika trojdimenzionálního čela trhliny: popis pomocí hranové singularity versus out of plain constrain
HUTAŘ, P. ŠEVČÍK, M. NÁHLÍK, L. ZOUHAR, M. SEITL, S. KNÉSL, Z. FERNÁNDEZ-CANTELI, A.
Český název
Lomová mechanika trojdimenzionálního čela trhliny: popis pomocí hranové singularity versus out of plain constrain
Anglický název
Fracture mechanics of the three-dimensional crack front: vertex singularity versus out of plain constraint descriptions
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
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.
Český abstrakt
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.
Anglický abstrakt
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.
Klíčová slova česky
in-plain constraint, out of plain constraint, hranová singularita, lineárně elastické lomová mechanika
Klíčová slova anglicky
in-plain constraint, out of plain constraint, vertex-singularity, linear elastic fracture mechanics
Rok RIV
2010
Vydáno
15.03.2010
Nakladatel
Elsevier Ltd.
ISSN
1877-7058
Časopis
Procedia Engineering
Ročník
2
Číslo
1
Strany od–do
2095–2102
Počet stran
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"
}