Detail publikačního výsledku

Numerical estimation of the fatigue crack front shape for a specimen with finite thickness

ŠEVČÍK, M.; HUTAŘ, P.; ZOUHAR, M.; NÁHLÍK, L.

Originální název

Numerical estimation of the fatigue crack front shape for a specimen with finite thickness

Anglický název

Numerical estimation of the fatigue crack front shape for a specimen with finite thickness

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

An iterative process for the estimation of a fatigue crack front based on linear elastic fracture mechanics using values of the stress singularity exponent is presented. Based on the assumption of a constant stress singularity exponent along the crack front, a numerical approach leading to crack shape determination is suggested and applied. The crack front was approximated by a spline curve. In each node defining the crack front the stress singularity exponent was estimated and a complete crack front shape was found. The difference between thin and thick specimens is then described and discussed. The approach presented leads to better estimation of the crack front shape for structures with different thicknesses and a more accurate determination of fatigue crack fracture parameters. The results presented can be helpful for a better understanding of fatigue failure and more reliable prediction of residual lifetime.

Anglický abstrakt

An iterative process for the estimation of a fatigue crack front based on linear elastic fracture mechanics using values of the stress singularity exponent is presented. Based on the assumption of a constant stress singularity exponent along the crack front, a numerical approach leading to crack shape determination is suggested and applied. The crack front was approximated by a spline curve. In each node defining the crack front the stress singularity exponent was estimated and a complete crack front shape was found. The difference between thin and thick specimens is then described and discussed. The approach presented leads to better estimation of the crack front shape for structures with different thicknesses and a more accurate determination of fatigue crack fracture parameters. The results presented can be helpful for a better understanding of fatigue failure and more reliable prediction of residual lifetime.

Klíčová slova

crack front shape; vertex singularity; fatigue crack; stress singularity exponent

Klíčová slova v angličtině

crack front shape; vertex singularity; fatigue crack; stress singularity exponent

Autoři

ŠEVČÍK, M.; HUTAŘ, P.; ZOUHAR, M.; NÁHLÍK, L.

Rok RIV

2013

Vydáno

09.02.2012

Nakladatel

Elsevier

ISSN

0142-1123

Periodikum

International Journal of Fatigue

Svazek

39

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

75

Strany do

80

Strany počet

6

BibTex

@article{BUT72898,
  author="Martin {Ševčík} and Pavel {Hutař} and Michal {Zouhar} and Luboš {Náhlík}",
  title="Numerical estimation of the fatigue crack front shape for a specimen with finite thickness",
  journal="International Journal of Fatigue",
  year="2012",
  volume="39",
  number="1",
  pages="75--80",
  issn="0142-1123"
}