Publication detail
The effect of the singularity induced by the free surface on fatigue crack growth in thin structures
HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z.
Czech title
Vliv rohové singularity na šíření trhlin v tenkých tělesech
English title
The effect of the singularity induced by the free surface on fatigue crack growth in thin structures
Type
journal article in Web of Science
Language
en
Original abstract
In many industrial applications is necessary to predict fatigue lifetime of thin structures, where the stress field near the crack front have a real three-dimensional nature. Due to the existence of vertex singularity in the point where the crack front touching free surface, crack propagation in 3D structures cannot be reduced to a series of plane strain or plane stress problems along the crack front edge. The paper describes the influence of vertex singularity on the distribution of the stresses around the crack front for three-dimensional body. The distribution of the stress singularity through the thickness of the specimen gives us indication of the crack behavior in thin structures. The estimation of the thickness of the specimen where the change of singularity plays an important role on fatigue crack growth rate (in dependence on Poisson's ratio) is carried out. The results contribute to a better understanding of the crack behavior in thin structures, and can help to more reliable estimates of their residual fatigue life.
Czech abstract
Práce se zabývá vlivem tzv. rohové singularity na šíření únavové trhliny zejména v tenkých tělesech.
English abstract
In many industrial applications is necessary to predict fatigue lifetime of thin structures, where the stress field near the crack front have a real three-dimensional nature. Due to the existence of vertex singularity in the point where the crack front touching free surface, crack propagation in 3D structures cannot be reduced to a series of plane strain or plane stress problems along the crack front edge. The paper describes the influence of vertex singularity on the distribution of the stresses around the crack front for three-dimensional body. The distribution of the stress singularity through the thickness of the specimen gives us indication of the crack behavior in thin structures. The estimation of the thickness of the specimen where the change of singularity plays an important role on fatigue crack growth rate (in dependence on Poisson's ratio) is carried out. The results contribute to a better understanding of the crack behavior in thin structures, and can help to more reliable estimates of their residual fatigue life.
Keywords in English
Fatigue crack, vertex singularity, thin structures
RIV year
2008
Released
30.07.2008
Publisher
Trans Tech Publications
Location
Switzerland
ISSN
1013-9826
Journal
Key Engineering Materials
Volume
385-387
Number
385-387
Pages from–to
317–320
Pages count
4
BIBTEX
@article{BUT48301,
author="Pavel {Hutař} and Luboš {Náhlík} and Zdeněk {Knésl},
title="The effect of the singularity induced by the free surface on fatigue crack growth in thin structures",
journal="Key Engineering Materials",
year="2008",
volume="385-387",
number="385-387",
month="July",
pages="317--320",
publisher="Trans Tech Publications",
address="Switzerland",
issn="1013-9826"
}