Detail publikace

Specimens for Simultaneous Mode II, III and II+III Fatigue Crack Propagation: Elasto-Plastic Solution of Crack Tip Stress-Strain Field

HORNÍKOVÁ, J. ŠANDERA, P. ŽÁK, S. POKLUDA, J.

Originální název

Specimens for Simultaneous Mode II, III and II+III Fatigue Crack Propagation: Elasto-Plastic Solution of Crack Tip Stress-Strain Field

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Determination of fatigue crack growth characteristics under shear-mode loading is a rather complicated problem. To increase an efficiency and precision of such testing, special specimens enabling simultaneous propagation of shear cracks under II, III and II+III loading modes started to be used rather recently. K-calibration of these specimens was performed and, after unique pre-crack and heat-treatment procedures, effective thresholds KII eff;th and KIII eff;th in several metallic materials could be measured. However, a description of crack growth rate in terms of appropriate fracture mechanics quantities demands a precise assessment of plastic zone size under various shear-mode loading levels. This contribution is focused on the numerical elasto-plastic analysis of stress-strain field at the crack tip in specimens made of a pure polycrystalline (ARMCO) iron. The results reveal that the small scale yielding conditions are fulfilled in the near-threshold region. Starting from K values higher than to KII eff;th (or KIII eff;th), however, the small scale yielding condition is no more valid. Therefore, KJ or J approach is more relevant for the description of crack growth rate. Probably the most interesting result of the analysis lies in a simple procedure that enables us to separate individual loading components KJ;II and KJ;III, applied in the mixed-mode II+III part of the specimen, by comparing elasto-plastic and elastic solutions.

Klíčová slova

shear-mode cracks, crack growth rate, K-calibration, plastic zone size, J-integral

Autoři

HORNÍKOVÁ, J.; ŠANDERA, P.; ŽÁK, S.; POKLUDA, J.

Rok RIV

2014

Vydáno

12. 3. 2014

Nakladatel

Trans Tech Publications

Místo

Melbourne

ISBN

978-3-03835-008-8

Kniha

11TH INTERNATIONAL FATIGUE CONGRESS

Edice

1

Číslo edice

1

ISSN

1022-6680

Periodikum

Advanced Materials Research

Ročník

891-892

Číslo

1

Stát

Švýcarská konfederace

Strany od

1585

Strany do

1590

Strany počet

6

BibTex

@inproceedings{BUT106330,
  author="Jana {Horníková} and Pavel {Šandera} and Stanislav {Žák} and Jaroslav {Pokluda}",
  title="Specimens for Simultaneous Mode II, III and II+III Fatigue Crack Propagation: Elasto-Plastic Solution of Crack Tip Stress-Strain Field",
  booktitle="11TH INTERNATIONAL FATIGUE CONGRESS",
  year="2014",
  series="1",
  journal="Advanced Materials Research",
  volume="891-892",
  number="1",
  pages="1585--1590",
  publisher="Trans Tech Publications",
  address="Melbourne",
  doi="10.4028/www.scientific.net/AMR.891-892.1585",
  isbn="978-3-03835-008-8",
  issn="1022-6680"
}