Formulas for the critical length of mode II and III cracks emanating from circumferential U–notches

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU150949" target="_blank" >RIV/00216305:26210/24:PU150949 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.engfracmech.2024.109955" target="_blank" >https://doi.org/10.1016/j.engfracmech.2024.109955</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engfracmech.2024.109955" target="_blank" >10.1016/j.engfracmech.2024.109955</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Formulas for the critical length of mode II and III cracks emanating from circumferential U–notches

Popis výsledku v původním jazyce

The crack emanating from the notch reaches its critical length when the notch ceases to have effect on the crack tip stress field. In this paper a semi–empirical approach to the critical length previously proposed for mode I cracks is extended to shear–mode cracks using finite element calculations. The existing formula for the critical crack length aIc of mode I cracks emanating from circumferential U–notches in round specimens is verified also for its invariance to the specimen thickness variation and its uncertainty is quantified to be less than 1 %. This uncertainty level is then employed to obtain statistically compatible formulae for critical crack lengths aIIc and aIIIc as functions of the notch depth, the notch-root radius and the notch depth normalized to specimen thickness. These formulae are useful for a correct determination of the pre-crack length free of the notch effect in fracture toughness experiments and for a proper evaluation of stress intensity factors in experimental investigations of fatigue crack propagation.

Název v anglickém jazyce

Formulas for the critical length of mode II and III cracks emanating from circumferential U–notches

Popis výsledku anglicky

The crack emanating from the notch reaches its critical length when the notch ceases to have effect on the crack tip stress field. In this paper a semi–empirical approach to the critical length previously proposed for mode I cracks is extended to shear–mode cracks using finite element calculations. The existing formula for the critical crack length aIc of mode I cracks emanating from circumferential U–notches in round specimens is verified also for its invariance to the specimen thickness variation and its uncertainty is quantified to be less than 1 %. This uncertainty level is then employed to obtain statistically compatible formulae for critical crack lengths aIIc and aIIIc as functions of the notch depth, the notch-root radius and the notch depth normalized to specimen thickness. These formulae are useful for a correct determination of the pre-crack length free of the notch effect in fracture toughness experiments and for a proper evaluation of stress intensity factors in experimental investigations of fatigue crack propagation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Engineering Fracture Mechanics

ISSN

0013-7944

e-ISSN

1873-7315

Svazek periodika

298

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

„109955-1“-„109955-15“

Kód UT WoS článku

001198282600001

EID výsledku v databázi Scopus

2-s2.0-85185411603