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.

English title

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

Type

journal article in Web of Science

Language

en

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.

English 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 in English

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

Released

22.08.2018

Publisher

ELSEVIER SCI LTD

Location

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

ISSN

0142-1123

Volume

118

Number

2019

Pages from–to

249–261

Pages count

13

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",
  year="2018",
  volume="118",
  number="2019",
  month="August",
  pages="249--261",
  publisher="ELSEVIER SCI LTD",
  address="THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND",
  issn="0142-1123"
}