Qiao Y, Zhang Z-X, Zhang S. An Experimental Study of the Relation between Mode I Fracture Toughness, KIc, and Critical Energy Release Rate, GIc. Materials. 2023; 16(3):1056. https://doi.org/10.3390/ma16031056
An experimental study of the relation between mode I fracture toughness, KIc, and critical energy release rate, GIc
|Author:||Qiao, Yang1; Zhang, Zong-Xian1; Zhang, Sheng2|
1Oulu Mining School, University of Oulu, 90570 Oulu, Finland
2School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454099, China
|Online Access:||PDF Full Text (PDF, 5.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023081094617
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2023-08-10
The construction of the relation between the critical energy release rate, 𝐺𝐼𝑐, and the mode I fracture toughness, 𝐾𝐼𝑐, is of great significance for understanding the fracture mechanism and facilitating its application in engineering. In this study, fracture experiments using NSCB and CCCD specimens were conducted. The effects of specimen sizes, loading rate and lithology on the relation between 𝐺𝐼𝑐 and 𝐾𝐼𝑐 were studied. 𝐺𝐼𝑐 was calculated by integrating the load–displacement curve according to Irwin’s approach. Based on the measured 𝐾𝐼𝑐 and 𝐺𝐼𝑐 of the rock specimens, a relation between 𝐺𝐼𝑐 and 𝐾𝐼𝑐 was found to be different from the classical formula under linear elasticity. It was found that both specimen size and loading rate do not influence this relation.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
This study was supported by the K. H. Renlund Stiftelse Foundation in Finland. The first author is grateful to the China Scholarship Council (funding number: CSC NO. 201908410233) for the financial support.
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).