Experimental study of dynamic periodic processes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F25%3A00603364" target="_blank" >RIV/68378297:_____/25:00603364 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.measen.2024.101669" target="_blank" >https://doi.org/10.1016/j.measen.2024.101669</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.measen.2024.101669" target="_blank" >10.1016/j.measen.2024.101669</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental study of dynamic periodic processes

Popis výsledku v původním jazyce

In the field of experimental mechanics, X-ray computed tomography is a well-established method for nondestructive testing of a wide range of objects. It is quite common to employ digital volumetric correlation to evaluate the deformation of bodies by comparing their initial and current state. Time-dependent tomography, which works with tomographic data sets covering the entire process under investigation, has also been on the rise in recent years. However, we must keep in mind that a single tomographic data set represents thousands of X-ray images, making such measurements quite demanding in terms of instrumentation and subsequent data processing. For events taking minutes or longer, conventional laboratory X-ray computed tomography scanner can be used, while for faster events a very intense X-ray source is usually required, which typically leads to the use of a synchrotron. From a particular speed, even synchrotron sources may no more be enough. An exception is tomographic tracking of purely periodic events, such as the oscillation of a beam at its natural frequency. As will be shown, despite the relatively high velocity of motion, a good reconstruction can be achieved even with a conventional X-ray source. Thus, we obtain information not only about the intrinsic shape of a particular beam, but also about its internal structure. It will be possible, for example, to investigate how any local imperfections may affect the shape of the vibration, assuming that some defects may not be apparent under static loading. Specifically, this paper will show the results of a tomographic reconstruction of a slender beam oscillating at 4.15 Hz.

Název v anglickém jazyce

Experimental study of dynamic periodic processes

Popis výsledku anglicky

In the field of experimental mechanics, X-ray computed tomography is a well-established method for nondestructive testing of a wide range of objects. It is quite common to employ digital volumetric correlation to evaluate the deformation of bodies by comparing their initial and current state. Time-dependent tomography, which works with tomographic data sets covering the entire process under investigation, has also been on the rise in recent years. However, we must keep in mind that a single tomographic data set represents thousands of X-ray images, making such measurements quite demanding in terms of instrumentation and subsequent data processing. For events taking minutes or longer, conventional laboratory X-ray computed tomography scanner can be used, while for faster events a very intense X-ray source is usually required, which typically leads to the use of a synchrotron. From a particular speed, even synchrotron sources may no more be enough. An exception is tomographic tracking of purely periodic events, such as the oscillation of a beam at its natural frequency. As will be shown, despite the relatively high velocity of motion, a good reconstruction can be achieved even with a conventional X-ray source. Thus, we obtain information not only about the intrinsic shape of a particular beam, but also about its internal structure. It will be possible, for example, to investigate how any local imperfections may affect the shape of the vibration, assuming that some defects may not be apparent under static loading. Specifically, this paper will show the results of a tomographic reconstruction of a slender beam oscillating at 4.15 Hz.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA22-13811S" target="_blank" >GA22-13811S: Inovativní defektoskopická metoda založená na tomografické analýze vlastních tvarů kmitání ve 3D</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Measurement: Sensors

ISSN

2665-9174

e-ISSN

2665-9174

Svazek periodika

38

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

101669

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85213943090