Porovnání nové rovnice popisující křivku růstu únavové trhliny s Nargovou rovnicí

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F06%3APU63066" target="_blank" >RIV/00216305:26210/06:PU63066 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation

Popis výsledku v původním jazyce

The so-called NASGRO equation allows a very good description of fatigue crack growth curves, i.e. the dependence of crack length increase per one fatigue cycle da/dN on the stress intensity factor range delta K. In 1999 the first author of this paper published quite similar equation, which written for given loading cycle asymmetry with positive stress ratio R contains the same parameters having similar meaning as in the NASGRO equation. In most cases studied by the authors this equation leads to a better fit than the NASGRO equation, above all when the experimental curve contains relatively long Paris straight line and/or relatively sharp bend from this line to the threshold stress intensity factor range. The generalization of the NASGRO equation for various values of stress ratio R was made in a quite complicated way. The new equation was generalized using the Walker model based on the relation delta K(R) = delta K(0)(1 - R)-m which is valid also for threshold value delta Kth but not

Název v anglickém jazyce

Comparison of a New Equation Describing Fatigue Crack Growth Cruves with the Narsgro Equation

Popis výsledku anglicky

The so-called NASGRO equation allows a very good description of fatigue crack growth curves, i.e. the dependence of crack length increase per one fatigue cycle da/dN on the stress intensity factor range delta K. In 1999 the first author of this paper published quite similar equation, which written for given loading cycle asymmetry with positive stress ratio R contains the same parameters having similar meaning as in the NASGRO equation. In most cases studied by the authors this equation leads to a better fit than the NASGRO equation, above all when the experimental curve contains relatively long Paris straight line and/or relatively sharp bend from this line to the threshold stress intensity factor range. The generalization of the NASGRO equation for various values of stress ratio R was made in a quite complicated way. The new equation was generalized using the Walker model based on the relation delta K(R) = delta K(0)(1 - R)-m which is valid also for threshold value delta Kth but not

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/GA106%2F03%2F1265" target="_blank" >GA106/03/1265: Vliv vybraných faktorů na únavové vlastnosti izotermicky zušlechtěné tvárné litiny</a><br>

Návaznosti

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

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Communications

ISSN

1335-4205

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

4/2006

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

5

Strana od-do

29-33

Kód UT WoS článku

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EID výsledku v databázi Scopus

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