Publication detail

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.

English title

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

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

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.

Keywords in English

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

Released

2012-09-30

ISSN

1802-1484

Journal

Engineering Mechanics

Volume

19

Number

2/3

Pages from–to

155–164

Pages count

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"
}