Damage deformation properties and acoustic emission characteristics of hard-brittle rock under constant amplitude cyclic loading

被引:0
作者
An, Qi [1 ,2 ]
Xu, Ying [1 ,2 ]
Fan, Guoqiang [1 ,2 ,3 ]
Li, Chengjie [1 ,2 ]
Xie, Shoudong [1 ,2 ,4 ]
Jiao, Yanghaonan [1 ,2 ]
机构
[1] Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, Huainan 232001, Anhui, Peoples R China
[2] Anhui Univ Sci & Technol, Engn Res Ctr Underground Mine Construct, Minist Educ, Huainan 232001, Anhui, Peoples R China
[3] Xinjiang Zhongyan Hengtai Blasting Engn Co Ltd, Urumqi 830000, Peoples R China
[4] Hongda Blasting Engn Grp Co Ltd, Changsha 410000, Peoples R China
基金
中国国家自然科学基金;
关键词
cyclic loading; apparent residual strain; Poisson's effect; Kaiser effect; Felicity effect; damage variable; MECHANICAL-PROPERTIES; ENERGY EVOLUTION; STRESS; SPECIMENS; SALT; PROPAGATION; INITIATION; BEHAVIOR; FATIGUE; SAMPLES;
D O I
10.21595/jve.2024.24170
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
In order to study the deformation and damage characteristics of the limestone specimens with high strength and brittleness under constant amplitude cyclic loading, the deformation and the acoustic emission (AE) characteristics were analysed, and the relationship between them was sought. The damage variables under different amplitude cyclic loading were defined by AE counts. The results showed that the radial deformation of the limestone specimens was more sensitive and unstable than the axial deformation. The concept of apparent residual strain was proposed to describe the specimen deformation characteristics, and it resulted that the radial apparent residual strain produced at higher stress state would recover at lower stress state. The limestone specimens showed obvious Kaiser effect and Felicity effect under cyclic loading. When the upper limit of the cyclic loading was close to the peak stress of the specimen, the AE counts generated in unloading sections were almost the same as that in the loading sections. The damage was increased as the amplitude and the stress level increased and the unloading process at higher stress level would also lead to the aggravation of damages. Specimens would absorb more energy under cyclic loading than under uniaxial loading. Reasonable driving parameters should be controlled in underground excavation practice, to ensure that the stress level of surrounding rock mass in a periodic stress state is located before peak stress and such that to limit the occurrence of rock burst to a certain extent.
引用
收藏
页码:1447 / 1462
页数:16
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