PSI - Issue 46

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2021) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 46 (2023) 155–161

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers. Keywords : fracture toughness, interfaces, rock, gypsum, flint Abstract Fracture toughness (FT) is one of the parameters that characterise the tendency of materials to crack and fracture. FT is usable for individual materials (such as metals, concrete, and composites) and the interfaces between them. FT of interfaces between different rocks or minerals is also of interest when assessing the stability of rock masses in mining. The novelty of this work is due to the FT of interfaces between rocks of various types. Standardized techniques exist for metals, concrete, and composite materials. For rock, the investigation uses the methodology recommended by the International Society of Rock Mechanics (ISRM). The article contains the FT values for gypsum stone, flint, as well as for the interfaces between them, which also include interlayers of carbonaceous clays. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers. Keywords : fracture toughness, interfaces, rock, gypsum, flint 1. Introduction Fracture toughness (FT) is one of the parameters that characterise the tendency of materials to crack and fracture. Fracture toughness is usable for individual materials, such as metals, concrete, composites, and the interfaces between them. The standards ASTM E23-18 and GOST 25.506–85 describe methods of determining FT for metals. Many researchers study FT for metals (Godefroid et al. (2020), (Liao et al. (2019), (Benmokrane et al. (2018), (Tavares et 5th International Conference on Structural Integrity and Durability Fracture toughness of interfaces between various minerals and rocks A.S. Voznesenskii a , *, Yu.V. Osipov a , b , E.I. Ushakov a , Ya.G. Semyonov b a National University of Science and Technology ”MISIS”, Mining Institute, 119991, Leninskii Prospect, 4, Moscow, Russia b LLC “Gazprom geotechnology”, 119311, Stroiteley Street, 8, bl.1, Moscow, Russia Abstract Fracture toughness (FT) is one of the parameters that characterise the tendency of materials to crack and fracture. FT is usable for individual materials (such as metals, concrete, and composites) and the interfaces between them. FT of interfaces between different rocks or minerals is also of interest when assessing the stability of rock masses in mining. The novelty of this work is due to the FT of interfaces between rocks of various types. Standardized techniques exist for metals, concrete, and composite materials. For rock, the investigation uses the methodology recommended by the International Society of Rock Mechanics (ISRM). The article contains the FT values for gypsum stone, flint, as well as for the interfaces between them, which also include interlayers of carbonaceous clays. 5th International Conference on Structural Integrity and Durability Fracture toughness of interfaces between various minerals and rocks A.S. Voznesenskii a , *, Yu.V. Osipov a , b , E.I. Ushakov a , Ya.G. Semyonov b a National University of Science and Technology ”MISIS”, Mining Institute, 119991, Leninskii Prospect, 4, Moscow, Russia b LLC “Gazprom geotechnology”, 119311, Stroiteley Street, 8, bl.1, Moscow, Russia 1. Introduction Fracture toughness (FT) is one of the parameters that characterise the tendency of materials to crack and fracture. Fracture toughness is usable for individual materials, such as metals, concrete, composites, and the interfaces between them. The standards ASTM E23-18 and GOST 25.506–85 describe methods of determining FT for metals. Many researchers study FT for metals (Godefroid et al. (2020), (Liao et al. (2019), (Benmokrane et al. (2018), (Tavares et

* Corresponding author. Tel.: +7-499-230-25-93; fax: +7 499 236-21-05. E-mail address: asvoznesenskii@misis.ru * Corresponding author. Tel.: +7-499-230-25-93; fax: +7 499 236-21-05. E-mail address: asvoznesenskii@misis.ru

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers. 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers 10.1016/j.prostr.2023.06.027