Progress in visualization of crack propagation in rocks using X-ray computed tomography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F18%3A00494949" target="_blank" >RIV/68145535:_____/18:00494949 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/18:00494949

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Progress in visualization of crack propagation in rocks using X-ray computed tomography

Popis výsledku v původním jazyce

High-resolution X-ray computed micro-tomography (CT) represents an effective tool for studying the processes of initiation, development and spreading of cracks in non-homogeneous quasi-brittle materials (e.g. rocks or concrete). This article presents recent progress focused on visualization of crack propagation in different rocks, especially sandstones. The CT visualization of crack propagation took place in three successive stages. In the first stage, an inspection of the final crack on disc-shaped bodies with a height of about 5 mm, cut from unbroken cylindrical samples after the chevron bend (CB) test was carried out. During the second phase, three-point bending CB tests were performed using an in-house designed loading device, allowing a precise control of the loading process based on modified LinuxCNC software (running on a real-time kernel). X-ray radiography of a horizontally oriented sample was carried out during loading. For the third, so far the last phase of the research, a completely newly designed loading device with four-point bending setup and vertically oriented scanned sample was used. This new design of the loading experiment, coupled with the high stiffness of the loading frame, makes it possible to interrupt the loading process at any time and perform CT scanning without the risk of sudden destruction of scanned sample.

Název v anglickém jazyce

Progress in visualization of crack propagation in rocks using X-ray computed tomography

Popis výsledku anglicky

High-resolution X-ray computed micro-tomography (CT) represents an effective tool for studying the processes of initiation, development and spreading of cracks in non-homogeneous quasi-brittle materials (e.g. rocks or concrete). This article presents recent progress focused on visualization of crack propagation in different rocks, especially sandstones. The CT visualization of crack propagation took place in three successive stages. In the first stage, an inspection of the final crack on disc-shaped bodies with a height of about 5 mm, cut from unbroken cylindrical samples after the chevron bend (CB) test was carried out. During the second phase, three-point bending CB tests were performed using an in-house designed loading device, allowing a precise control of the loading process based on modified LinuxCNC software (running on a real-time kernel). X-ray radiography of a horizontally oriented sample was carried out during loading. For the third, so far the last phase of the research, a completely newly designed loading device with four-point bending setup and vertically oriented scanned sample was used. This new design of the loading experiment, coupled with the high stiffness of the loading frame, makes it possible to interrupt the loading process at any time and perform CT scanning without the risk of sudden destruction of scanned sample.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/LO1406" target="_blank" >LO1406: Institut čistých technologií těžby a užití energetických surovin - Projekt udržitelnosti</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 39th West Japan Symposium on Rock Engineering

ISBN

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ISSN

0917-2580

e-ISSN

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Počet stran výsledku

4

Strana od-do

25-28

Název nakladatele

Nagasaki University

Místo vydání

Nagasaki

Místo konání akce

Nagasaki

Datum konání akce

22. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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