Publication detail

The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators

KLUSÁK, J. PROFANT, T. KNÉSL, Z. KOTOUL, M.

Original Title

The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators

Type

journal article - other

Language

English

Original Abstract

This paper deals with assessment of conditions of fracture initiation in singular stress concentrations that are modeled by a bi-material notch composed of two orthotropic materials. Within the assessment of the stress concentrators, the stability criteria based on standard linear elastic fracture mechanics can lead to incorrect results due to discontinuity and orthotropy of fracture toughness. Procedures in literature suggested for assessing the critical applied loading and fracture initiation direction usually consider only the change of elastic constants of the material and do not consider the change of fracture toughness. The stability criterion considering fracture toughness dependent on the direction of presupposed fracture initiation is shown in the paper. It is concluded that the criterion of this kind can qualitatively and quantitatively influence the estimated fracture initiation conditions, and it contributes to more reliable assessment of components with geometrical and/or material discontinuity.

Keywords

Composites, Generalized fracture mechanics, Fracture toughness mismatch, Bi-material notches, Stability criterion of notches

Authors

KLUSÁK, J.; PROFANT, T.; KNÉSL, Z.; KOTOUL, M.

RIV year

2013

Released

4. 9. 2013

Publisher

PERGAMON-ELSEVIER SCIENCE LTD

Location

England, Oxford

ISBN

0013-7944

Periodical

Engineering Fracture Mechanics

Year of study

110

Number

2013

State

United Kingdom of Great Britain and Northern Ireland

Pages from

438

Pages to

447

Pages count

10

BibTex

@article{BUT106074,
  author="Jan {Klusák} and Tomáš {Profant} and Zdeněk {Knésl} and Michal {Kotoul}",
  title="The influence of discontinuity and orthotropy of fracture toughness on conditions of fracture initiation in singular stress concentrators",
  journal="Engineering Fracture Mechanics",
  year="2013",
  volume="110",
  number="2013",
  pages="438--447",
  issn="0013-7944"
}