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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F12%3A00385372%21RIV13-GA0-68081723
rdf:type
n3:Vysledek skos:Concept
dcterms:description
In many industrial applications it is necessary to predict fatigue lifetime of the structures where the stress field near the crack front have a three-dimensional nature. Due to the existence of vertex singularity in the point where the crack front touches free surface, crack propagation in 3D structures cannot be reduced to a series of plane strain or plane stress problems along the crack front. The paper describes the influence of the vertex singularity on crack shape for threedimensional structure. The iterative process for estimation of a real crack front based on a stress singularity exponent is presented. In each node defining the crack front the stress singularity exponent has been estimated and complete crack front shape corresponding to the constant stress singularity exponent was found. The methodology presented can help to estimate crack front shape in a linear elastic fracture mechanics framework and estimate fracture parameters of fatigue cracks more accurately. In many industrial applications it is necessary to predict fatigue lifetime of the structures where the stress field near the crack front have a three-dimensional nature. Due to the existence of vertex singularity in the point where the crack front touches free surface, crack propagation in 3D structures cannot be reduced to a series of plane strain or plane stress problems along the crack front. The paper describes the influence of the vertex singularity on crack shape for threedimensional structure. The iterative process for estimation of a real crack front based on a stress singularity exponent is presented. In each node defining the crack front the stress singularity exponent has been estimated and complete crack front shape corresponding to the constant stress singularity exponent was found. The methodology presented can help to estimate crack front shape in a linear elastic fracture mechanics framework and estimate fracture parameters of fatigue cracks more accurately.
dcterms:title
Fatigue crack shape prediction based on the stress singularity exponent Fatigue crack shape prediction based on the stress singularity exponent
skos:prefLabel
Fatigue crack shape prediction based on the stress singularity exponent Fatigue crack shape prediction based on the stress singularity exponent
skos:notation
RIV/68081723:_____/12:00385372!RIV13-GA0-68081723
n3:predkladatel
n4:ico%3A68081723
n5:aktivita
n12:Z n12:P
n5:aktivity
P(GA101/09/0867), Z(AV0Z2041904)
n5:cisloPeriodika
1
n5:dodaniDat
n13:2013
n5:domaciTvurceVysledku
n8:9200002 n8:1161415 n8:6154557 n8:3875636
n5:druhVysledku
n18:J
n5:duvernostUdaju
n16:S
n5:entitaPredkladatele
n19:predkladatel
n5:idSjednocenehoVysledku
136241
n5:idVysledku
RIV/68081723:_____/12:00385372
n5:jazykVysledku
n9:eng
n5:klicovaSlova
stress singularity exponent; crack front curvature; vertex singularity; free surface effect
n5:klicoveSlovo
n10:crack%20front%20curvature n10:stress%20singularity%20exponent n10:free%20surface%20effect n10:vertex%20singularity
n5:kodStatuVydavatele
CH - Švýcarská konfederace
n5:kontrolniKodProRIV
[6A5D5E720157]
n5:nazevZdroje
Key Engineering Materials
n5:obor
n15:JL
n5:pocetDomacichTvurcuVysledku
4
n5:pocetTvurcuVysledku
4
n5:projekt
n20:GA101%2F09%2F0867
n5:rokUplatneniVysledku
n13:2012
n5:svazekPeriodika
488-489
n5:tvurceVysledku
Náhlík, Luboš Knésl, Zdeněk Ševčík, Martin Hutař, Pavel
n5:wos
000306531200044
n5:zamer
n6:AV0Z2041904
s:issn
1013-9826
s:numberOfPages
4
n14:doi
10.4028/www.scientific.net/KEM.488-489.178