Publication detail

The influence of vertex singularities on fatigue crack shape

HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z. SEITL, S.

Original Title

The influence of vertex singularities on fatigue crack shape

Type

conference paper

Language

English

Original Abstract

Due to the existence of vertex singularity at the point where the crack intersects the free surface, stress distribution around the crack tip and the type of the singularity is changed. In the interior of the specimen the classical singular behaviour of the crack is dominant and can be described using generally known analytic equations. Contrary to this, at the free surface or in the boundary layer close to the free surface the vertex singularity is significant. The influence of vertex singularity on crack behaviour and crack shape for a three-dimensional structure is described in this paper. To estimate the influence of the free surface on fatigue crack growth rate the model of a general singular stress concentrator was applied. Using this concept of the generalized stress intensity factor it is possible to estimate the behaviour of a crack with general singular stress field. The estimated fatigue crack shape can help to provide a more reliable estimation of the fatigue life of the structures considered.

Keywords

vertex singularity, fatigue crack, generalized stress intensity factor

Authors

HUTAŘ, P.; NÁHLÍK, L.; KNÉSL, Z.; SEITL, S.

RIV year

2008

Released

2. 9. 2008

Publisher

VUTIUM

Location

Brno

ISBN

9781617823190

Book

ECF17 - European Conference on Fracture 17

Pages from

1060

Pages to

1066

Pages count

7

BibTex

@inproceedings{BUT30082,
  author="Pavel {Hutař} and Luboš {Náhlík} and Zdeněk {Knésl} and Stanislav {Seitl}",
  title="The influence of vertex singularities on fatigue crack shape",
  booktitle="ECF17 - European Conference on Fracture 17",
  year="2008",
  pages="1060--1066",
  publisher="VUTIUM",
  address="Brno",
  isbn="9781617823190"
}