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"
}