Large plastic zones and extensive influence of notch under near-threshold mode II and mode III loading of fatigue cracks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU130221" target="_blank" >RIV/00216305:26620/18:PU130221 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.prostr.2018.12.235" target="_blank" >http://dx.doi.org/10.1016/j.prostr.2018.12.235</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2018.12.235" target="_blank" >10.1016/j.prostr.2018.12.235</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large plastic zones and extensive influence of notch under near-threshold mode II and mode III loading of fatigue cracks

Popis výsledku v původním jazyce

Plastic zone shapes and sizes were determined for a cylindrical specimen for mode II and mode III crack testing made of ARMCO iron. Three methods of calculation were applied: Irwins approximate solution, HRR field and finite element method. The plastic zones were found to be very large under mode II and mode III loading even at the loading level corresponding to fatigue crack growth threshold. The difference between sizes of plastic zones under tensile-mode and shear-mode loading was explained by different stress gradients and corresponding stress concentration factors of notches under shear and tensile type loading. This is also the reason for a much further influence of notch on stress intensity factors for mode II and mode III cracks emanating from the notch than the influence under mode I loading. Preliminary results for reversed plastic zone size indicated that it is smaller than the theoretical size of 1/4 of the monotonic zone which explained the presence of large monotonic zone at threshold loading.

Název v anglickém jazyce

Large plastic zones and extensive influence of notch under near-threshold mode II and mode III loading of fatigue cracks

Popis výsledku anglicky

Plastic zone shapes and sizes were determined for a cylindrical specimen for mode II and mode III crack testing made of ARMCO iron. Three methods of calculation were applied: Irwins approximate solution, HRR field and finite element method. The plastic zones were found to be very large under mode II and mode III loading even at the loading level corresponding to fatigue crack growth threshold. The difference between sizes of plastic zones under tensile-mode and shear-mode loading was explained by different stress gradients and corresponding stress concentration factors of notches under shear and tensile type loading. This is also the reason for a much further influence of notch on stress intensity factors for mode II and mode III cracks emanating from the notch than the influence under mode I loading. Preliminary results for reversed plastic zone size indicated that it is smaller than the theoretical size of 1/4 of the monotonic zone which explained the presence of large monotonic zone at threshold loading.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GJ17-15716Y" target="_blank" >GJ17-15716Y: Inherentní odpor proti šíření únavových smykových trhlin v kovových materiálech</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Procedia Structural Integrity

ISSN

2452-3216

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

special

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

6

Strana od-do

1123-1128

Kód UT WoS článku

000459860900185

EID výsledku v databázi Scopus

2-s2.0-85064599069