期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 23, 期 -, 页码 5164-5180出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2023.02.104
关键词
Random fractured rock; Compression -shear test; Numerical simulation; Crack propagation; Scale effect
This paper investigates fracture propagation and scale effect in random fractured rock samples under compression-shear condition. The samples are produced with rock-like materials, and the mechanical responses are studied by controlling the compression-shear angle. The strain field evolution is analyzed using digital image processing technology, and the influence of compression-shear angle on failure mode is revealed.
Fractures and rock blocks are the essential components of rock mass, random fractured rock is the general manifestation of fractured rock mass, which is particularly significant in scale effect. To facilitate the tests, most of the previous studies on fractured rock mass were conducted on regular fractured rocks, which is not conducive to fully revealing the me-chanical properties and failure characteristics of fractured rock mass. In this paper, the random fractured rock samples were produced with rock-like materials to investigate the fracture propagation and scale effect under compression-shear condition. Specifically, the samples were loaded by controlling the compression-shear angle to study the mechanical responses. In the test, speckle changes on the samples surface were recorded in real time, and the evolution of strain field was analyzed by digital image processing technology. Then, the internal relations among compression-shear angle, fracture distribution and crack propagation were discussed. Meanwhile, the failure modes of the random fractured samples with different compression-shear angles were summarized to reveal the influence of compression-shear angle on failure mode. Combined with PFC2D, the random fractured rock models of different scales were established to explore the mechanical characteristic vari-ation, and the representative elementary volume of shear modulus was finally determined.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据