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"
}