Textural Fractography of Fatigue Fractures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F09%3A00160395" target="_blank" >RIV/68407700:21340/09:00160395 - 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

Textural Fractography of Fatigue Fractures

Popis výsledku v původním jazyce

Within conventional fractography, the reconstitution of the history of a fatigue crack growth is based on striations and/or beach lines. As an alternative, image textural analysis is applied. SEM magnifications from 30 to 500x are used. Six methods havebeen developed: application of 2D Fourier and 2D Wavelet transformations, fractal analysis, Gibbs random field model, idealization of light objects into a fiber structure, and auto-shape decomposition. Images are characterized by image feature vector, from which crack growth rates (CGR) are expressed by means of a multivariate statistical model or a neural network. Under variable cycle loadings, the conventional definition of CGR is fractographicly confusing. A new concept of reference crack growth rate(RCGR) covers all fatigue cracks regardless of the type of loading. RCGR may be estimated directly from images of fracture surfaces, or from a cycle-by-cycle crack growth model. Several applications on real data are presented.

Název v anglickém jazyce

Textural Fractography of Fatigue Fractures

Popis výsledku anglicky

Within conventional fractography, the reconstitution of the history of a fatigue crack growth is based on striations and/or beach lines. As an alternative, image textural analysis is applied. SEM magnifications from 30 to 500x are used. Six methods havebeen developed: application of 2D Fourier and 2D Wavelet transformations, fractal analysis, Gibbs random field model, idealization of light objects into a fiber structure, and auto-shape decomposition. Images are characterized by image feature vector, from which crack growth rates (CGR) are expressed by means of a multivariate statistical model or a neural network. Under variable cycle loadings, the conventional definition of CGR is fractographicly confusing. A new concept of reference crack growth rate(RCGR) covers all fatigue cracks regardless of the type of loading. RCGR may be estimated directly from images of fracture surfaces, or from a cycle-by-cycle crack growth model. Several applications on real data are presented.

Druh

C - Kapitola v odborné knize

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

2009

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Fatigue Crack Growth: Mechanics, Behavior and Prediction

ISBN

978-1-60692-476-1

Počet stran výsledku

42

Strana od-do

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Počet stran knihy

264

Název nakladatele

Nova Science Publishers, Inc.

Místo vydání

Hauppauge NY

Kód UT WoS kapitoly

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