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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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

Czech name

Porovnání nové rovnice popisující křivku růstu únavové trhliny s Nargovou rovnicí

Czech description

Tzv. Nagsrova rovnice zharnuje velimi dobrý popis křivky růstu únavové trhliny. V roce 1999 první autor tohoto článku publikoval velmi podobnou rovnici, která je určena pro dané asymetrické zatížení s kladným poměrem R obsahující stejné prarametry se stejným významem jako v nasgrově rovnici. Ve většině následných studiích tohoto autora tato rovnice vedla k lepší aproximaci než nasgrova rovnice.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

<a href="/en/project/GA106%2F03%2F1265" target="_blank" >GA106/03/1265: Influence of selected factors on fatigue properties of ADI</a><br>

Continuities

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

Publication year

2006

Confidentiality

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

Name of the periodical

Communications

ISSN

1335-4205

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

4/2006

Country of publishing house

SK - SLOVAKIA

Number of pages

5

Pages from-to

29-33

UT code for WoS article

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EID of the result in the Scopus database

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