Evaluation of overloading and crack closure effects on fatigue crack growth in an aircraft 7075-T7351 Al-alloy.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F14%3A%230000480" target="_blank" >RIV/25797000:_____/14:#0000480 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.scientific.net/KEM" target="_blank" >http://www.scientific.net/KEM</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.577-578.325" target="_blank" >10.4028/www.scientific.net/KEM.577-578.325</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of overloading and crack closure effects on fatigue crack growth in an aircraft 7075-T7351 Al-alloy.

Popis výsledku v původním jazyce

An investigation of effects of overloads on fatigue crack growth (FCG) and retardation in Al 7075-T7351 alloy was carried out. FCG rates were measured at load asymmetry R = Fmin / F max = 0.1, in quite wide region of growth between 10-8 and 10-5 m/cycle(stress intensity factor range AK between 6 and 40 MPa m1/2). Retardation effects of overloads of the magnitudes 2.7-times and 3.0-times of the maximum load in the constant range fatigue loading were significant. Crack mouth opening displacement was evaluated at numerous stages of crack growth including pre-cracking with so called load shedding method. The overloads resulted in substantial crack closure effects, which, however, did not occur immediately after the overloading, but after further fatigue crack extension. Results are discussed considering both theoretically and experimentally estimated plastic zone size and considering crack closure issues recently published in the literature.

Název v anglickém jazyce

Evaluation of overloading and crack closure effects on fatigue crack growth in an aircraft 7075-T7351 Al-alloy.

Popis výsledku anglicky

An investigation of effects of overloads on fatigue crack growth (FCG) and retardation in Al 7075-T7351 alloy was carried out. FCG rates were measured at load asymmetry R = Fmin / F max = 0.1, in quite wide region of growth between 10-8 and 10-5 m/cycle(stress intensity factor range AK between 6 and 40 MPa m1/2). Retardation effects of overloads of the magnitudes 2.7-times and 3.0-times of the maximum load in the constant range fatigue loading were significant. Crack mouth opening displacement was evaluated at numerous stages of crack growth including pre-cracking with so called load shedding method. The overloads resulted in substantial crack closure effects, which, however, did not occur immediately after the overloading, but after further fatigue crack extension. Results are discussed considering both theoretically and experimentally estimated plastic zone size and considering crack closure issues recently published in the literature.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Key Engineering Materials

ISSN

1013-9826

e-ISSN

—

Svazek periodika

577-578

Číslo periodika v rámci svazku

2014

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

325-328

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—