Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures

In order to reveal the fracture development and damage evolution law of marble under the influence of temperature, the deformation and failure characteristics and acoustic emission activity of marble under the conditions of 30, 60, 90, 120 ℃ and 150 ℃ were studied by using triaxial servo testing ma...

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Main Authors: LI Hao-ran, WANG Zi-heng, MENG Shi-rong, ZHAO Wei-gang, CHEN Feng
Format: Article
Language:English
Published: SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 2021-10-01
Series:Rock and Soil Mechanics
Subjects:
Online Access:http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5253
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author LI Hao-ran
WANG Zi-heng
MENG Shi-rong
ZHAO Wei-gang
CHEN Feng
author_facet LI Hao-ran
WANG Zi-heng
MENG Shi-rong
ZHAO Wei-gang
CHEN Feng
author_sort LI Hao-ran
collection DOAJ
description In order to reveal the fracture development and damage evolution law of marble under the influence of temperature, the deformation and failure characteristics and acoustic emission activity of marble under the conditions of 30, 60, 90, 120 ℃ and 150 ℃ were studied by using triaxial servo testing machine and acoustic emission testing system. The results show that the triaxial compression failure of marble under high temperature goes through four stages: compaction and elastic deformation stage, plastic deformation stage, ductile failure stage and instability failure stage. The higher the test temperature is, the longer the compaction deformation stage and ductile failure stage are, and the rock gradually transforms from elastic brittle failure to elastic-plastic failure. The peak strength, elastic modulus and internal friction angle of marble decrease with the increase of temperature. The acoustic emission activity of rock and the correspondence between AE location and macroscopic crack decrease with the increase of test temperature. By analyzing the characteristics of acoustic emission signal amplitude, impact, ring down count, acoustic emission energy, peak frequency and b value in the damage evolution process of marble, it is found that the amplitude fluctuation of acoustic emission is small and the temperature sensitivity is poor, but the peak frequency and b value parameters can better characterize the crack development inside the rock. The peak frequency has the highest temperature sensitivity, which is favorable as the prediction index of rock failure and instability. In the process of triaxial compression failure, tension-shear composite cracks appear in marble, of which shear cracks are dominant. High temperature inhibits the initiation of internal cracks in rock mass. The higher the test temperature is, the weaker the tensile failure and the stronger the shear failure are. The test results shed light on the study of rock thermal damage mechanism and engineering thermal damage monitoring and prediction.
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spelling doaj.art-0c83dff604584bd39e69a4fcbeed76e12022-12-22T01:32:16ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-10-0142102672268210.16285/j.rsm.2021.5253Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperaturesLI Hao-ran0WANG Zi-heng1MENG Shi-rong2ZHAO Wei-gang3CHEN Feng41. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China 2. Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China2. Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China2. Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China1. State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China 2. Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China In order to reveal the fracture development and damage evolution law of marble under the influence of temperature, the deformation and failure characteristics and acoustic emission activity of marble under the conditions of 30, 60, 90, 120 ℃ and 150 ℃ were studied by using triaxial servo testing machine and acoustic emission testing system. The results show that the triaxial compression failure of marble under high temperature goes through four stages: compaction and elastic deformation stage, plastic deformation stage, ductile failure stage and instability failure stage. The higher the test temperature is, the longer the compaction deformation stage and ductile failure stage are, and the rock gradually transforms from elastic brittle failure to elastic-plastic failure. The peak strength, elastic modulus and internal friction angle of marble decrease with the increase of temperature. The acoustic emission activity of rock and the correspondence between AE location and macroscopic crack decrease with the increase of test temperature. By analyzing the characteristics of acoustic emission signal amplitude, impact, ring down count, acoustic emission energy, peak frequency and b value in the damage evolution process of marble, it is found that the amplitude fluctuation of acoustic emission is small and the temperature sensitivity is poor, but the peak frequency and b value parameters can better characterize the crack development inside the rock. The peak frequency has the highest temperature sensitivity, which is favorable as the prediction index of rock failure and instability. In the process of triaxial compression failure, tension-shear composite cracks appear in marble, of which shear cracks are dominant. High temperature inhibits the initiation of internal cracks in rock mass. The higher the test temperature is, the weaker the tensile failure and the stronger the shear failure are. The test results shed light on the study of rock thermal damage mechanism and engineering thermal damage monitoring and prediction. http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5253high temperaturedamage evolutionacoustic emissionb valuecrack types
spellingShingle LI Hao-ran
WANG Zi-heng
MENG Shi-rong
ZHAO Wei-gang
CHEN Feng
Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
Rock and Soil Mechanics
high temperature
damage evolution
acoustic emission
b value
crack types
title Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
title_full Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
title_fullStr Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
title_full_unstemmed Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
title_short Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
title_sort acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures
topic high temperature
damage evolution
acoustic emission
b value
crack types
url http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5253
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AT wangziheng acousticemissionactivityanddamageevolutioncharacteristicsofmarbleundertriaxialstressathightemperatures
AT mengshirong acousticemissionactivityanddamageevolutioncharacteristicsofmarbleundertriaxialstressathightemperatures
AT zhaoweigang acousticemissionactivityanddamageevolutioncharacteristicsofmarbleundertriaxialstressathightemperatures
AT chenfeng acousticemissionactivityanddamageevolutioncharacteristicsofmarbleundertriaxialstressathightemperatures