Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail publikace
VOJTEK, T. ŽÁK, S. POKLUDA, J.
Originální název
On the connection between mode II and mode III effective thresholds in metals
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Closure-free long cracks under the remote mode III loading grow in a more complicated way than those under the remote mode II. For bcc metals, a coplanar in-plane spreading of tongues driven by the local mode II loading components at crack-front asperities prevails while twisting of crack-front segments to mode I, often leading to factory-roof morphology, is typical for other materials. In bcc metals, therefore, the formulation of a quantitative relationship connecting effective thresholds in modes II and III demands to calculate the local mode II components of stress intensity factors at typical asperities of a crack front loaded in the remote mode III. Therefore, a numerical model of a serrated crack front was created and the results were compared with experimentally determined ratio of mode II and III effective thresholds for the ARMCO iron. Although the calculated crack-front roughness needs an experimental verification, the preliminary results indicate that the model can provide a quantitative explanation of the experimentally observed ratio of mode II and mode III effective thresholds in bcc metals.
Klíčová slova
Modes II and III; Effective threshold; Micromechanism; Finite element method; ARMCO iron
Autoři
VOJTEK, T.; ŽÁK, S.; POKLUDA, J.
Vydáno
1. 7. 2017
Nakladatel
Italian Group of Fracture
ISSN
1971-8993
Periodikum
Frattura ed Integrita Strutturale
Ročník
11
Číslo
41
Stát
Italská republika
Strany od
245
Strany do
251
Strany počet
7
URL
https://www.fracturae.com/index.php/fis/article/view/IGF-ESIS.41.33
Plný text v Digitální knihovně
http://hdl.handle.net/11012/180643
BibTex
@article{BUT142361, author="Tomáš {Vojtek} and Stanislav {Žák} and Jaroslav {Pokluda}", title="On the connection between mode II and mode III effective thresholds in metals", journal="Frattura ed Integrita Strutturale", year="2017", volume="11", number="41", pages="245--251", doi="10.3221/IGF-ESIS.41.33", issn="1971-8993", url="https://www.fracturae.com/index.php/fis/article/view/IGF-ESIS.41.33" }