Computational Time reversal: localization of cracks

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Computational Time reversal: localization of cracks

Popis výsledku v původním jazyce

There are several fields where Time reversal (TR) method has found its application. Our object of interest is the application in ultrasonic non-destructive testing (NDT). In NDT, this method can be used for tracing the source of vibrations in solid bodies, the source being a crack or some other defect, using a backward wave propagation for refocusing of the original source. The computational TR process consists of two steps. In the first step - the Frontal task, a model is loaded at the given place with the defined loading signal and an output is recorded at some location. In the second stepn- the Reverse task, this responding signal is reversed in time and loaded back into the model so as to locate the original source (e.g. crack). Here we focus on localization of an initializing and a propagating crack in the prestressed finite element (FE) model. Besides other things, we also study how the length of the computation (number of reections of the elastic waves) in uences thenprobability of localization of the crack. For numerical solution, we use the linear FE method, explicit integration in time.

Název v anglickém jazyce

Computational Time reversal: localization of cracks

Popis výsledku anglicky

There are several fields where Time reversal (TR) method has found its application. Our object of interest is the application in ultrasonic non-destructive testing (NDT). In NDT, this method can be used for tracing the source of vibrations in solid bodies, the source being a crack or some other defect, using a backward wave propagation for refocusing of the original source. The computational TR process consists of two steps. In the first step - the Frontal task, a model is loaded at the given place with the defined loading signal and an output is recorded at some location. In the second stepn- the Reverse task, this responding signal is reversed in time and loaded back into the model so as to locate the original source (e.g. crack). Here we focus on localization of an initializing and a propagating crack in the prestressed finite element (FE) model. Besides other things, we also study how the length of the computation (number of reections of the elastic waves) in uences thenprobability of localization of the crack. For numerical solution, we use the linear FE method, explicit integration in time.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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