Publication detail

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

HOLÁŇ, L. POKLUDA, J. SLÁMEČKA, K.

Original Title

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

English Title

Local Aspects of Shear-mode Crack Propagation in Austenitic Steel

Type

conference paper

Language

Czech

Original Abstract

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.

English abstract

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.

Keywords

crack paths, threshold, loading modes

Key words in English

crack paths, threshold, loading modes

Authors

HOLÁŇ, L.; POKLUDA, J.; SLÁMEČKA, K.

RIV year

2009

Released

1. 12. 2009

Publisher

ÚFM AVČR

Location

Brno

ISBN

978-80-254-6070-2

Book

Víceúrovňový design pokrokových materiálů 09

Pages from

123

Pages to

130

Pages count

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"
}