Properties of non-uniform deformation evolution of rock under uniaxial cyclic loading and unloading

被引：0
|
作者：
Yang X. [1 ,2 ]
Han X. [1 ,2 ]
Liu E. [1 ,2 ]
Zhang Z. [1 ,2 ]
Wang T. [3 ]
Zhang L. [3 ]
机构：
[1] School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing
[2] Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, Beijing
[3] Bulianta Coal Mine, Shenhua Shendong Coal Group, Ordos
来源：
Han, Xinxing (hanxxyydy123@126.com) | 2018年 / China Coal Society卷 / 43期
关键词：
Cyclic loading and unloading; Digital speckle correlation method; Displacement; Localization; Non-uniform deformation;
D O I：
10.13225/j.cnki.jccs.2017.1119
中图分类号：
学科分类号：
摘要：
In order to study the mechanic responding mechanism of rock materials under cyclic loading and unloading, uniaxial cyclic loading and unloading tests were carried out to investigate the non-uniform deformation evolution processes of granite specimens. The deformation images of specimens during the tests were collected by CCD camera and based on the digital speckle correlation method, the non-uniform deformation, the evolution laws of the characteristic parameters of the localization during cyclic loading and unloading were analyzed. The research results show that: With the increase of cycle numbers, the non-uniform deformation is more and more obvious. The statistical index Sw of non-uniform deformation increases with the increase of loading stress, and increases with the increase of cycle numbers. After the localization of a specimen appears, the extrusion displacement and the influence width of the localization band all increase with the increase of stress and cycle numbers in the subsequent cycles. © 2018, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：449 / 456
页数：7
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