Tomographic investigation of the sandstone fracture toughness

0557024 - ÚTAM 2023 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Vavřík, Daniel - Beneš, Pavel - Fíla, Tomáš - Koudelka_ml., Petr - Kumpová, Ivana - Vavro, Martin
Tomographic investigation of the sandstone fracture toughness.
Engineering mechanics 2022. Book of full texts. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2022 - (Fischer, C.; Náprstek, J.), s. 397-400. ISBN 978-80-86246-48-2. ISSN 1805-8248. E-ISSN 1805-8256.
[International Conference Engineering mechanics 2022. Milovy (CZ), 09.05.2022-12.05.2022]
Grant CEP: GA MŠMT(CZ) EF16_019/0000766
Institucionální podpora: RVO:68378297 ; RVO:68145535
Klíčová slova: fracture process zone * crack path * quasi-brittle material * X-Ray computed tomography * four-point bending test
Obor OECD: Materials engineering; Environmental and geological engineering, geotechnics (UGN-S)
https://www.engmech.cz/im/proceedings/show_p/2022/397

It is well known that the measured values of the fracture toughness of quasi brittle materials are influenced by material heterogeneity, dimensions, boundary conditions, and unequal tension and compression properties. Standard testing methods supposing isotropic material, in contrary the quasi-brittle materials differ from this theoretical expectation, therefore this approach may fail. The authors present Local Fracture Toughness Testing (LFTT) method to overcome this obstacle. LFFT based on a complex methodology using a series of tomographic reconstructions recorded during specimen loading is calculated independently of the outside boundary conditions.
Trvalý link: http://hdl.handle.net/11104/0331327