Detail publikace

Near-Threshold Propagation of Mode II and Mode III Cracks

HOLÁŇ, L. PIPPAN, R. POKLUDA, J. HORNÍKOVÁ, J. HOHENWARTER, A. SLÁMEČKA, K.

Originální název

Near-Threshold Propagation of Mode II and Mode III Cracks

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

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. The cylindrical specimens made of austenitic and ferritic steels with circumferential V-notch were prepared. The specially manufactured loading setups enabled to assure a pure remote shear mode II at both the top and the bottom sites of the specimen, whereas a pure mode III operated at front and back sites. Differences between the mechanisms of crack propagation were assessed by means of the 3D fractographical analysis based on 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 \Delta KIIth (R = 0.1) were found to be of 1.2 MPam1/2 in ferrite and of 3.5 MPam1/2 in austenite, whereas \Delta KIIIth=2.0 in ferrite and \Delta KIIIth = 4.7 MPam1/2 in austenite. In both steels, the near-threshold crack growth rate under the mode II was found to be much higher than that under the mode III.

Klíčová slova

crack paths, threshold, fatigue

Autoři

HOLÁŇ, L.; PIPPAN, R.; POKLUDA, J.; HORNÍKOVÁ, J.; HOHENWARTER, A.; SLÁMEČKA, K.

Rok RIV

2009

Vydáno

1. 10. 2009

Nakladatel

University of Parma

Místo

Vicenza, Italy

ISBN

0000000000000

Kniha

Crack Paths

Strany od

585

Strany do

592

Strany počet

8

BibTex

@inproceedings{BUT30036,
  author="Libor {Holáň} and Reinhard {Pippan} and Jaroslav {Pokluda} and Jana {Horníková} and Anton {Hohenwarter} and Karel {Slámečka}",
  title="Near-Threshold Propagation of Mode II and Mode III Cracks",
  booktitle="Crack Paths",
  year="2009",
  pages="585--592",
  publisher="University of Parma",
  address="Vicenza, Italy",
  isbn="0000000000000"
}