Volumetric deformation and damage evolution of Tibet interbedded skarn under multistage constant-amplitude-cyclic loading

Zhu, C., Karakus, M., He, M., Meng, Q., Shang, J. , Wang, Y. and Yin, Q. (2022) Volumetric deformation and damage evolution of Tibet interbedded skarn under multistage constant-amplitude-cyclic loading. International Journal of Rock Mechanics and Mining Sciences, 152, 105066. (doi: 10.1016/j.ijrmms.2022.105066)

Abstract

Multistage constant-amplitude-cyclic (MCAC) loading experiments were conducted on Tibet interbedded skarn to investigate and characterize fatigue mechanical behavior of the tested rock. Rock volumetric deformation, stiffness change, and fatigue damage evolution were analyzed along with the macroscopic failure morphology. The experimental results demonstrated that the volumetric deformation of the tested skarn was influenced by the interbed structure. Rock damage presented a two-stage pattern. The rock damage increased quickly at the beginning and subsequently became steady for long periods of time within a cyclic loading stage. A new damage evolution model was proposed on the basis of axial strain. Macroscopic failure morphology analysis revealed different fracture mechanisms, combining a tension-splitting mode, shear-sliding, and mixed shear-tension. In this study, the understanding of the anisotropic mechanical properties of interbedded skarn was highlighted, and this could contribute to the ability to predict the stabilities of rock engineering structures.

• Item Type: Articles
• Additional Information: This work was supported by the National Natural Science Foundation of China (NSFC) (No. 41941018, 52104125 and No. 42007256), the National Key Technologies Research & Development program (2018YFC0808402), the funding of State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining & Technology, Beijing (SKLGDUEK2133), and the Fundamental Research Funds for the Central Universities.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Shang, Dr Junlong

Creator Roles

Shang, J.: Conceptualization, Investigation, Writing – review and editing

• Authors: Zhu, C., Karakus, M., He, M., Meng, Q., Shang, J., Wang, Y., and Yin, Q.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• Journal Name: International Journal of Rock Mechanics and Mining Sciences
• Publisher: Elsevier
• ISSN: 1365-1609
• ISSN (Online): 1873-4545
• Published Online: 24 February 2022
• Copyright Holders: Copyright © 2022 Elsevier Ltd.
• First Published: First published in International Journal of Rock Mechanics and Mining Sciences 152: 105066
• Publisher Policy: Reproduced in accordance with the publisher copyright policy