Publication detail
CRACK INITIATION CRITERIA FOR SINGULAR STRESS CONCENTRATIONS, Part III: An Application to a Crack Touching a Bimaterial Interface
NÁHLÍK, L. KNÉSL, Z. KLUSÁK, J.
Czech title
Kriteria stability obecných singulárních koncentrátorů napětí, Část III: Aplikace na trhliny na bi-materiálovém rozhraní
English title
CRACK INITIATION CRITERIA FOR SINGULAR STRESS CONCENTRATIONS, Part III: An Application to a Crack Touching a Bimaterial Interface
Type
journal article - other
Language
en
Original abstract
The paper deals with crack propagation through an interface between two elastic materials. The basic idea of developing stability criteria of general singular stress concentrators introduced in the first part is applied to the case of a crack with its tip at the interface between two different materials. Three different stability criteria based on different physical principles are presented and a numerical example with their mutual comparison is carried out. A procedure based on a generalized strain energy density factor is shown which makes it possible to estimate the further direction of crack propagation after the crack has passed the interface. The procedure presented is applied in the numerical examples.
Czech abstract
Je analyzován vliv trhliny v povrchové vrstvě na porušení konstrukce. Těleso s ochranným povrchem je modelováno jako bi-materiálové těleso. Problém je řešen v rámci předpokladů lineární lomové mechaniky. Je kvantifikován vliv materiálových parametrů povrchové vrstvy a podkladu na šíření povrchové trhliny. Je ukázáno, že v případě tuhé povrchové vrstvy na podajném podkladu dochází k poklesu hodnoty kritického napětí vedoucího k porušení tělesa.
English abstract
The paper deals with crack propagation through an interface between two elastic materials. The basic idea of developing stability criteria of general singular stress concentrators introduced in the first part is applied to the case of a crack with its tip at the interface between two different materials. Three different stability criteria based on different physical principles are presented and a numerical example with their mutual comparison is carried out. A procedure based on a generalized strain energy density factor is shown which makes it possible to estimate the further direction of crack propagation after the crack has passed the interface. The procedure presented is applied in the numerical examples.
Keywords in Czech
bi-materiálové rozhraní, kriteria stability, šíření trhliny, kritické napětí, prahové napětí
Keywords in English
bimaterial interface, stability criteria, crack propagation, threshold stress, critical stress
RIV year
2008
Released
30.05.2008
Publisher
Engineering Academy of the Czech Rep.
Location
Praha
ISSN
1802-1484
Journal
Engineering Mechanics
Volume
15
Number
2
Pages from–to
99–114
Pages count
16
BIBTEX
@article{BUT48866,
author="Luboš {Náhlík} and Zdeněk {Knésl} and Jan {Klusák},
title="CRACK INITIATION CRITERIA FOR SINGULAR STRESS CONCENTRATIONS, Part III: An Application to a Crack Touching a Bimaterial Interface",
journal="Engineering Mechanics",
year="2008",
volume="15",
number="2",
month="May",
pages="99--114",
publisher="Engineering Academy of the Czech Rep.",
address="Praha",
issn="1802-1484"
}