Detail publikace

The effect of the singularity induced by the free surface on fatigue crack growth in thin structures

HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z.

Originální název

The effect of the singularity induced by the free surface on fatigue crack growth in thin structures

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Fatigue crack, vertex singularity, thin structures

Autoři

HUTAŘ, P.; NÁHLÍK, L.; KNÉSL, Z.

Rok RIV

2008

Vydáno

30. 7. 2008

Nakladatel

Trans Tech Publications

Místo

Switzerland

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Ročník

385-387

Číslo

385-387

Stát

Švýcarská konfederace

Strany od

317

Strany do

320

Strany počet

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 (print)",
  year="2008",
  volume="385-387",
  number="385-387",
  pages="317--320",
  issn="1013-9826"
}