Detail publikace
Local Aspects of Shear-mode Crack Propagation in Austenitic Steel
HOLÁŇ, L. POKLUDA, J. SLÁMEČKA, K.
Český 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
cs
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.
Český 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 česky
crack paths, threshold, loading modes
Klíčová slova anglicky
crack paths, threshold, loading modes
Rok RIV
2009
Vydáno
01.12.2009
Nakladatel
ÚFM AVČR
Místo
Brno
ISBN
978-80-254-6070-2
Kniha
Víceúrovňový design pokrokových materiálů 09
Strany od–do
123–130
Počet stran
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",
month="December",
pages="123--130",
publisher="ÚFM AVČR",
address="Brno",
isbn="978-80-254-6070-2"
}