Počet záznamů: 1

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

SYSNO ASEP	0494949
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Progress in visualization of crack propagation in rocks using X-ray computed tomography
Tvůrce(i)	Vavro, Leona (UGN-S)_RID Vavro, Martin (UGN-S)_{RID, ORCID} Fíla, Tomáš (UTAM-F)_{RID, SAI, ORCID} Kytýř, Daniel (UTAM-F)_{SAI, RID, ORCID} Souček, Kamil (UGN-S)_{RID, ORCID}
Celkový počet autorů	5
Zdroj.dok.	Proceedings of the 39th West Japan Symposium on Rock Engineering. - Nagasaki : Nagasaki University, 2018 - ISSN 0917-2580
Rozsah stran	s. 25-28
Poč.str.	4 s.
Forma vydání	Tištěná - P
Akce	West Japan Symposium on Rock Engineering /39./
Datum konání	22.09.2018 - 23.09.2018
Místo konání	Nagasaki
Země	JP - Japonsko
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	JP - Japonsko
Klíč. slova	X-ray computed micro-tomography ; non-homogeneous quasi-brittle materials ; rocks
Vědní obor RIV	DH - Báňský průmysl vč. těžby a zpracování uhlí
Obor OECD	Mechanical engineering
Vědní obor RIV – spolupráce	Ústav teoretické a aplikované mechaniky - Ostatní materiály
CEP	LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UGN-S - RVO:68145535 ; UTAM-F - RVO:68378297
Anotace	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.
Pracoviště	Ústav geoniky
Kontakt	Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
Rok sběru	2019

Počet záznamů: 1