Publication detail

Effect of the free surface on the fatigue crack front curvature at high stress asymmetry

OPLT, T. HUTAŘ, P. POKORNÝ, P. NÁHLÍK, L. CHLUP, Z. BERTO, F.

Original Title

Effect of the free surface on the fatigue crack front curvature at high stress asymmetry

Type

journal article in Web of Science

Language

English

Original Abstract

The purpose of this paper is to investigate the effect of the vertex singularity on the fatigue crack front behaviour. Single edge notch bend specimens of steel EA4T and aluminium alloy 7075 of various thicknesses are subjected to the cyclic loading and the angles of the fatigue crack front curvature was measured. The experimental procedure is simulated using finite element analysis. Two methodologies used for the fatigue crack front shape estimation are compared. One is using stress singularity exponent as a controlling parameter and the second one is using stress intensity factor. Both methodologies provide comparable results of crack front formation process and they are in very good agreement with experimental results.

Keywords

Stress intensity factor; Vertex singularity; Free surface; Fatigue crack front; Finite elements

Authors

OPLT, T.; HUTAŘ, P.; POKORNÝ, P.; NÁHLÍK, L.; CHLUP, Z.; BERTO, F.

Released

22. 8. 2018

Publisher

ELSEVIER SCI LTD

Location

THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

ISBN

0142-1123

Periodical

INTERNATIONAL JOURNAL OF FATIGUE

Year of study

118

Number

2019

State

United Kingdom of Great Britain and Northern Ireland

Pages from

249

Pages to

261

Pages count

13

URL

https://www.sciencedirect.com/science/article/pii/S0142112318304080?via%3Dihub

BibTex

@article{BUT156362,
  author="Tomáš {Oplt} and Pavel {Hutař} and Pavel {Pokorný} and Luboš {Náhlík} and Zdeněk {Chlup} and Filippo {Berto}",
  title="Effect of the free surface on the fatigue crack front curvature at high stress asymmetry",
  journal="INTERNATIONAL JOURNAL OF FATIGUE",
  year="2018",
  volume="118",
  number="2019",
  pages="249--261",
  doi="10.1016/j.ijfatigue.2018.08.026",
  issn="0142-1123",
  url="https://www.sciencedirect.com/science/article/pii/S0142112318304080?via%3Dihub"
}