Detail publikace

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

HOLÁŇ, L. POKLUDA, J. SLÁMEČKA, K.

Originální název

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

Anglický název

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

čeština

Originální abstrakt

Two prototype experiments allowing a simultaneous mode II and mode III fatigue crack propagation in a single specimen are described and the differences in related to growth are discussed. Differences between the mechanisms of crack propagation were assessed by means of the 3D fractographical analysis based the stereophotogrammetry in SEM. The stress intensity factors KII and KIII were determined by a numerical method based on the ANSYS code and compared with asymptotically computed values of KIII. The threshold values KIIth (R = 0.1) were found to be of 3.5 MPam1/2 and KIIIth = 4.7 MPam1/2 According to results of stereophotogrammetrical analysis, however, all investigated shear mode cracks propagated under a local mode I. Therefore, such macroscopically determined values can not be considered to be shear- mode thresholds.

Anglický abstrakt

Two prototype experiments allowing a simultaneous mode II and mode III fatigue crack propagation in a single specimen are described and the differences in related to growth are discussed. Differences between the mechanisms of crack propagation were assessed by means of the 3D fractographical analysis based the stereophotogrammetry in SEM. The stress intensity factors KII and KIII were determined by a numerical method based on the ANSYS code and compared with asymptotically computed values of KIII. The threshold values KIIth (R = 0.1) were found to be of 3.5 MPam1/2 and KIIIth = 4.7 MPam1/2 According to results of stereophotogrammetrical analysis, however, all investigated shear mode cracks propagated under a local mode I. Therefore, such macroscopically determined values can not be considered to be shear- mode thresholds.

Klíčová slova

crack paths, threshold, loading modes

Klíčová slova v angličtině

crack paths, threshold, loading modes

Autoři

HOLÁŇ, L.; POKLUDA, J.; SLÁMEČKA, K.

Rok RIV

2009

Vydáno

1. 12. 2009

Nakladatel

ÚFM AVČR

Místo

Brno

ISBN

978-80-254-6070-2

Kniha

Víceúrovňový design pokrokových materiálů 09

Strany od

123

Strany do

130

Strany počet

8

BibTex

@inproceedings{BUT30313,
  author="Libor {Holáň} and Jaroslav {Pokluda} and Karel {Slámečka}",
  title="Local Aspects of Shear-mode Crack Propagation in Austenitic Steel",
  booktitle="Víceúrovňový design pokrokových materiálů 09",
  year="2009",
  pages="123--130",
  publisher="ÚFM AVČR",
  address="Brno",
  isbn="978-80-254-6070-2"
}