Analysis of Fatigue Crack Growth Rate Data in an Aircraft 7175-T7351 Al-Alloy Generated at Different Accredited Laboratories with Probability Life Assessment Example

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F18%3AN0000026" target="_blank" >RIV/25797000:_____/18:N0000026 - isvavai.cz</a>

Result on the web

<a href="https://www.worldscientific.com/doi/10.1142/S175697371850004X" target="_blank" >https://www.worldscientific.com/doi/10.1142/S175697371850004X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S175697371850004X" target="_blank" >10.1142/S175697371850004X</a>

Result language

angličtina

Original language name

Analysis of Fatigue Crack Growth Rate Data in an Aircraft 7175-T7351 Al-Alloy Generated at Different Accredited Laboratories with Probability Life Assessment Example

Original language description

Estimation of safety and reliability of engineering structures and components containing cracks or crack-like defects is one of the most important application field of fracture mechanics particularly in components, where limited defects can be accepted. Such design philosophy is usually called "damage tolerance", formerly "safe life". In such cases, safety and reliability of further operation, residual life assessment and specification of interval of damage development inspections are important issues. Existing exact knowledge on fatigue crack growth (FCG) parameters is an essential condition. Results of FCG measurement in an Al 7175-T7351 alloy of a particularly high homogeneity, carried out as a part of the Proficiency Test Program organized by Exova in France are presented in this work. Results were evaluated in terms of parameters C and m of the Paris dependence in the stable growth region. To pass the test program successfully, a particular attention was paid to improve and verify direct current potential drop (DCPD) method being used for the crack length measurement. In the paper, the results of the FCG measurements generated by different participating laboratories were analyzed. A distinct correlation between C and m values, so called "coupling", was found and demonstrated. Some paradoxes of the assessment of laboratories were addressed, namely the fact that a laboratory assessed as unacceptable concerning one of the parameters generated much more accurate and useful data than another laboratory with a better assessment. Eventually, the results including their scatter were used to provide an example of probabilistic assessment of a simple beam residual life to show practical actual impacts of the scatter on the life assessment.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/TH02010664" target="_blank" >TH02010664: Innovative methods of welding of high pressure devices using laser technologies</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Multiscale Modeling

ISSN

1756-9737

e-ISSN

1756-9745

Volume of the periodical

9

Issue of the periodical within the volume

4

Country of publishing house

SG - SINGAPORE

Number of pages

8

Pages from-to

neuvedeno

UT code for WoS article

000454311400001

EID of the result in the Scopus database

—