Analysis of Roughness-Induced Crack Closure Based on Asymmetric Crack-Wake Plasticity and Size Ratio Effect

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F07%3APU63725" target="_blank" >RIV/00216305:26210/07:PU63725 - 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

Analysis of Roughness-Induced Crack Closure Based on Asymmetric Crack-Wake Plasticity and Size Ratio Effect

Popis výsledku v původním jazyce

Asymmetric arrangements of stored crack-wake dislocations and low values of the size ratio SR, the characteristic microstructural distance divided by the plastic zone size, were found to be of basic importance for the misfit of crack flanks causing the roughness-induced crack closure. According to newly derived formulae including these effects, an estimation of a maximal level of roughness-induced crack closure can be made for metallic materials in the near threshold crack growth regime. On the basis ofstatistical considerations, the assessments can be extended for the whole fatigue crack propagation regime. A negligible level of roughness-induced crack closure in nanomaterials is predicted as a partial result of the statistical analysis.

Název v anglickém jazyce

Analysis of Roughness-Induced Crack Closure Based on Asymmetric Crack-Wake Plasticity and Size Ratio Effect

Popis výsledku anglicky

Asymmetric arrangements of stored crack-wake dislocations and low values of the size ratio SR, the characteristic microstructural distance divided by the plastic zone size, were found to be of basic importance for the misfit of crack flanks causing the roughness-induced crack closure. According to newly derived formulae including these effects, an estimation of a maximal level of roughness-induced crack closure can be made for metallic materials in the near threshold crack growth regime. On the basis ofstatistical considerations, the assessments can be extended for the whole fatigue crack propagation regime. A negligible level of roughness-induced crack closure in nanomaterials is predicted as a partial result of the statistical analysis.

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Materials Science and Engineering A

ISSN

0921-5093

e-ISSN

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Svazek periodika

462

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

355-358

Kód UT WoS článku

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EID výsledku v databázi Scopus

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