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Statements

Subject Item
n2:RIV%2F00216305%3A26110%2F01%3APU23225%21RIV%2F2003%2FGA0%2F261103%2FN
rdf:type
skos:Concept n21:Vysledek
dcterms:description
One of the primary reasons for the observed deviation of the behaviour of concrete from predictions based on linear elastic fracture mechanics can be the interaction between a crack and a material inhomogeneity such as a particle which necessarily exists in such a material. In this paper, concrete is modelled as a two-phase material and the behaviour of a crack with its tip on the interface between two different materials is studied. In contrast to cracks in homogeneous materials the stress singularity for a crack terminating at the interface is of the type r exp -lambda, where the value of the stress singularity exponent, lambda, is in the interval 0 < lambda < 1. This means that classical fracture mechanics theory and criterion cannot be applied. In the paper a new stability criterion is formulated. Conditions for the stability of the crack terminating at the interface between two materials are then used to estimate the critical stress for the intersection of coarse aggregate particles. It is shown One of the primary reasons for the observed deviation of the behaviour of concrete from predictions based on linear elastic fracture mechanics can be the interaction between a crack and a material inhomogeneity such as a particle which necessarily exists in such a material. In this paper, concrete is modelled as a two-phase material and the behaviour of a crack with its tip on the interface between two different materials is studied. In contrast to cracks in homogeneous materials the stress singularity for a crack terminating at the interface is of the type r exp -lambda, where the value of the stress singularity exponent, lambda, is in the interval 0 < lambda < 1. This means that classical fracture mechanics theory and criterion cannot be applied. In the paper a new stability criterion is formulated. Conditions for the stability of the crack terminating at the interface between two materials are then used to estimate the critical stress for the intersection of coarse aggregate particles. It is shown
dcterms:title
Calculation of the critical stress in two-phase materials Calculation of the critical stress in two-phase materials
skos:prefLabel
Calculation of the critical stress in two-phase materials Calculation of the critical stress in two-phase materials
skos:notation
RIV/00216305:26110/01:PU23225!RIV/2003/GA0/261103/N
n3:strany
737-744
n3:aktivita
n9:Z n9:P
n3:aktivity
P(GV103/97/K003), P(KSK1076602), Z(AV0Z2041904)
n3:dodaniDat
n20:2003
n3:domaciTvurceVysledku
n17:3875636 n17:1315196
n3:druhVysledku
n15:D
n3:duvernostUdaju
n22:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
674839
n3:idVysledku
RIV/00216305:26110/01:PU23225
n3:jazykVysledku
n14:eng
n3:klicovaSlova
aggregate, cement paste, concrete, critical stress, elastic mismatch, finite element method, fracture mechanics, mortar, two-phase material
n3:klicoveSlovo
n12:cement%20paste n12:concrete n12:aggregate n12:mortar n12:critical%20stress n12:two-phase%20material n12:fracture%20mechanics n12:elastic%20mismatch n12:finite%20element%20method
n3:kontrolniKodProRIV
[0315B1541937]
n3:mistoKonaniAkce
Cape Town
n3:mistoVydani
Amsterdam
n3:nazevZdroje
Structural Engineering, Mechanics and Computation
n3:obor
n19:JN
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n4:GV103%2F97%2FK003 n4:KSK1076602
n3:rokUplatneniVysledku
n20:2001
n3:tvurceVysledku
Keršner, Zbyněk Náhlík, Luboš Knésl, Zdeněk
n3:typAkce
n16:WRD
n3:zahajeniAkce
2001-04-02+02:00
n3:zamer
n7:AV0Z2041904
s:numberOfPages
8
n8:hasPublisher
ELSEVIER SCIENCE Ltd.
n13:isbn
0-08-043948-9
n11:organizacniJednotka
26110