中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院页岩气与地质工程重点实验室
Strain rate effects on characteristic stresses and acoustic emission properties of granite under quasi-static compression

文献类型：期刊论文

作者Liu, Lu2,3,4; Wang, Sijing3,4; Yang, Wencheng1,3
刊名FRONTIERS IN EARTH SCIENCE
出版日期2022-08-10
卷号10页码:21
关键词strain rate effects characteristic stresses acoustic emission energy conversion multi-scale defects
DOI10.3389/feart.2022.960812
英文摘要In order to further investigate the strain rate effects on characteristic stresses and acoustic emission parameters of rock under quasi-static compression, uniaxial compressive tests were conducted on cylindrical specimens measuring 50 mm in diameter and 100 mm in height using a rock material testing machine and a multi-channel acoustic emission monitoring system at strain rates ranging from 10(-6) s(-1) to 10(-2) s(-1). The stress-strain curves of rock samples, characteristic stresses, energy data, and temporal and spatial distribution of acoustic emission signals were obtained and analyzed. The experimental results certified a linearly positive correlation between characteristic stresses and the logarithm of strain rates, despite the fact that the linear correlation varies for different characteristic stresses, whereas the ratios of characteristic stresses essentially do not change with increasing strain rates. The input energy and elastic strain energy at the damage point, UCS point and failure stress point exhibit a linearly positive correlation with the logarithm of strain rates when the strain rate exceeds 10(-5) s(-1). Meanwhile, the characteristics of energy conversion between input energy and elastic strain energy or the dissipated energy at different characteristic stresses points were explored. Based on this, the energy conversion process of rock under quasi-static compression can be divided into three stages: energy accumulation, energy dissipation, and energy release, respectively. Besides, it is noted that the total number of the located AE events decreases as strain rates increase when the strain rate exceeds 10(-5) s(-1), and the majority of located AE events occur during the crack closure stage and unstable crack growth stage. Finally, based on the perspective of energy conversion and the structural properties of multi-scale defects in rock, the mechanism of the increase of characteristic stresses with the increase of strain rates was proposed: that is, when rock is subjected to quasi-static compression, the higher strain rates can activate the small-scale defects, which necessitates more input energy from the external load via continuous work and causes an increase in the associated characteristic stresses.
WOS关键词TRIAXIAL COMPRESSION ; FRACTURE CHARACTERISTICS ; ENERGY-STORAGE ; ROCK MATERIALS ; LOADING RATE ; STRENGTH ; FAILURE ; BEHAVIOR ; TESTS ; DEFORMATION
资助项目Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; [SKLGP2016K001]
WOS研究方向Geology
语种英语
WOS记录号WOS:000844032300001
出版者FRONTIERS MEDIA SA
资助机构Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) ; Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)
源URL[http://ir.iggcas.ac.cn/handle/132A11/108428]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Wang, Sijing
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Res, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Lu,Wang, Sijing,Yang, Wencheng. Strain rate effects on characteristic stresses and acoustic emission properties of granite under quasi-static compression[J]. FRONTIERS IN EARTH SCIENCE,2022,10:21.
APA Liu, Lu,Wang, Sijing,&Yang, Wencheng.(2022).Strain rate effects on characteristic stresses and acoustic emission properties of granite under quasi-static compression.FRONTIERS IN EARTH SCIENCE,10,21.
MLA Liu, Lu,et al."Strain rate effects on characteristic stresses and acoustic emission properties of granite under quasi-static compression".FRONTIERS IN EARTH SCIENCE 10(2022):21.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。