Detail publikace

The effect of critical distance on stability conditions for a crack at the interface between two polymer materials

ZOUHAR, M. NÁHLÍK, L. HUTAŘ, P. ŠEVČÍK, M. KNÉSL, Z.

Originální název

The effect of critical distance on stability conditions for a crack at the interface between two polymer materials

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

The aim of this work is to study the behaviour of a crack with its tip at the interface between two polymer materials. A numerical model of a cracked bi-material tension specimen is investigated and different stability criteria are tested. The stability criterion of a general stress concentrator usually needs a relation between the critical value of the generalized stress intensity factor (HIC) and critical value of the stress intensity factor KIC (fracture toughness). This relation is a function of the elastic mismatch of particular materials; the fracture toughness of the main material and the critical distance d ahead of the stress concentrator, where the criterion is applied. Estimation of distance d is usually not straightforward and different authors use different approaches for its determination. Therefore the main aim of this study is the mutual comparison of published approaches for d estimation and to quantify the influence of d choice on the critical load value. The results obtained can lead to a better residual lifetime prediction and safer design of layered structures.

Klíčová slova

stability criterion, critical distance, bi-material interface, generalized stress intensity factor

Autoři

ZOUHAR, M.; NÁHLÍK, L.; HUTAŘ, P.; ŠEVČÍK, M.; KNÉSL, Z.

Rok RIV

2012

Vydáno

30. 9. 2012

ISSN

1802-1484

Periodikum

Engineering Mechanics

Ročník

19

Číslo

2/3

Stát

Česká republika

Strany od

155

Strany do

164

Strany počet

10

BibTex

@article{BUT95290,
  author="Michal {Zouhar} and Luboš {Náhlík} and Pavel {Hutař} and Martin {Ševčík} and Zdeněk {Knésl}",
  title="The effect of critical distance on stability conditions for a crack at the interface between two polymer materials",
  journal="Engineering Mechanics",
  year="2012",
  volume="19",
  number="2/3",
  pages="155--164",
  issn="1802-1484"
}