Description of Fatigue Crack Growth under Modes II, III and II+III in Terms of J-integral

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU111170" target="_blank" >RIV/00216305:26620/14:PU111170 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.mspro.2014.06.136" target="_blank" >http://dx.doi.org/10.1016/j.mspro.2014.06.136</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mspro.2014.06.136" target="_blank" >10.1016/j.mspro.2014.06.136</a>

Result language

angličtina

Original language name

Description of Fatigue Crack Growth under Modes II, III and II+III in Terms of J-integral

Original language description

Mode II and mode III fatigue crack growth rates and the related intrinsic stress intensity factor range thresholds deltaKIIeff,th and deltaKIIIeff,th were for a long time expected to be equal. However, there are many theoretical and experimental indications of a slower crack growth rate and a higher threshold for mode III than that for mode II for various metallic materials. In this article, a description of shear-mode fatigue crack growth for specimens made of ARMCO iron in terms of a diagram da/dN vs. deltaJ is presented and compared with that based on deltaK. For higher applied loads the description in terms of deltaK is no more valid which turned out from a precise assessment of plastic zone size for a wide range of shear-mode loading levels in these specimens. This numerical elasto-plastic analysis revealed that the small-scale yielding conditions were only fulfilled in the near-threshold region and, for higher loading levels, the deltaJ approach should be utilized. The measured curves plotted for loading modes II, III and II+III showed higher effective mode II threshold than that of mode III but approximately equal crack growth rates for both modes II and III. The mode II cracks in metals usually propagate faster than the mode III ones because the factory-roof morphology created under mode III loading produces a high friction, thus reducing the effective crack driving force significantly. The unusual behavior of ARMCO iron can be explained here by a coplanar crack propagation without forming the factory roof morphology.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20306 - Audio engineering, reliability analysis

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Procedia Materials Science

ISSN

2211-8128

e-ISSN

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Volume of the periodical

3

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

835-840

UT code for WoS article

000398274600131

EID of the result in the Scopus database

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