›› 2011, Vol. 32 ›› Issue (6): 1886-1890.

• Numerical Analysis • Previous Articles     Next Articles

Study of numerical simulation of acoustic emission in rock of inhomogeneity

SU HUI 1, 2, DANG Cheng-hua 2, LI Yan-jun 2   

  1. 1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Water Resources and Hydropower, Hebei University of Engineering, Handan, Hebei 056021, China
  • Received:2009-11-23 Online:2011-06-10 Published:2011-06-21

PDF (Chinese)

1937

Abstract: The failure process of rock in uniaxial compression tests is simulated by using the particle flow code(PFC). Fish language embedded within PFC2D is used to generate random imperfections and to develop the rock numerical specimens with different homogeneous degrees. The results show that inhomogeneous degree has great influence on characteristics of acoustic emission in rock. With the increase of inhomogeneous degree, peak strength of rock specimens decreases and the total number of AE increases greatly. The spatial distribution of AE becomes more extensively. Meanwhile, AE of rock samples appear earlier and sustain for longer duration. The intensity of AE after the peak failure retains higher level. The maximum intensity of AE under uniaxial stress state lags behind the peak damage to different extents. With the increase of inhomogeneous rock, the hysteresis effect of AE becomes obvious which suggests that rock failure appears earlier than the maximum intensity of AE.

Key words: acoustic emission, rock failure, particle flow code, microcrack, residual strength

CLC Number: 

  • TU452
[1] ZHANG Yan-bo, SUN Lin, YAO Xu-long, LIANG Peng, TIAN Bao-zhu, LIU Xiang-xin, . Experimental study of time-frequency characteristics of acoustic emission key signals during granite fracture [J]. Rock and Soil Mechanics, 2020, 41(1): 157-165.
[2] ZHENG Kun, MENG Qing-shan, WANG Ren, YU Ke-fu, . Experimental study of acoustic emission characteristics of coral skeleton limestone under triaxial compression [J]. Rock and Soil Mechanics, 2020, 41(1): 205-213.
[3] ZHANG Guo-kai, LI Hai-bo, WANG Ming-yang, LI Xiao-feng, . Crack propagation characteristics in rocks containing single fissure based on acoustic testing and camera technique [J]. Rock and Soil Mechanics, 2019, 40(S1): 63-72.
[4] LOU Ye, ZHANG Guang-qing. Experimental analysis of fracturing fluid viscosity on cyclic hydraulic fracturing [J]. Rock and Soil Mechanics, 2019, 40(S1): 109-118.
[5] XIE Hui-hui, XU Zhen-hao, LIU Qing-bing, HU Gui-yang, . Evolution of peak strength and residual strength of weak expansive soil under drying-wetting cycle paths [J]. Rock and Soil Mechanics, 2019, 40(S1): 245-252.
[6] LIU Xi-ling, LIU Zhou, LI Xi-bing, HAN Meng-si. Acoustic emission b-values of limestone under uniaxial compression and Brazilian splitting loads [J]. Rock and Soil Mechanics, 2019, 40(S1): 267-274.
[7] YANG Dao-xue, ZHAO Kui, ZENG Peng, ZHUO Yu-long, . Numerical simulation of unknown wave velocity acoustic emission localization based on particle swarm optimization algorithm [J]. Rock and Soil Mechanics, 2019, 40(S1): 494-502.
[8] HOU Gong-yu, JING Hao-yong, LIANG Jin-ping, ZHANG Guang-dong, TAN Jin-xin, ZHANG Yong-kang, YANG Xi, . Experimental study of deformation and acoustic emission characteristics of rectangular roadway under different unloading rates [J]. Rock and Soil Mechanics, 2019, 40(9): 3309-3318.
[9] CHEN Bing-rui, WU Hao, CHI Xiu-wen, LIU Hui, WU Meng-die, YAN Jun-wei, . Real-time recognition algorithm for microseismic signals of rock failure based on STA/LTA and its engineering application [J]. Rock and Soil Mechanics, 2019, 40(9): 3689-3696.
[10] SONG Yi-min, DENG Lin-lin, LÜ Xiang-feng, XU Hai-liang, ZHAO Ze-xin, . Study of acoustic emission characteristics and deformation evolution during rock frictional sliding [J]. Rock and Soil Mechanics, 2019, 40(8): 2899-2906.
[11] CHENG Ai-ping, ZHANG Yu-shan, DAI Shun-yi, DONG Fu-song, ZENG Wen-xu, LI Dan-feng, . Space-time evolution of acoustic emission parameters of cemented backfill and its fracture prediction under uniaxial compression [J]. Rock and Soil Mechanics, 2019, 40(8): 2965-2974.
[12] ZHANG Chuan-qing, LIU Zhen-jiang, ZHANG Chun-sheng, ZHOU Hui, GAO Yang, HOU Jing, . Experimental study on rupture evolution and failure characteristics of aphanitic basalt [J]. Rock and Soil Mechanics, 2019, 40(7): 2487-2496.
[13] WU Jin-wen, FENG Zi-jun, LIANG Dong, BAO Xian-kai, . Characteristics of granite failure by injecting high-temperature-vapour under uniaxial stress [J]. Rock and Soil Mechanics, 2019, 40(7): 2637-2644.
[14] CHEN Guo-qing, TANG Peng, LI Guang-ming, ZHANG Guang-ze, WANG Dong, . Analysis of acoustic emission frequency spectrum characteristics and main fracture precursor of rock bridge in direct shear test [J]. Rock and Soil Mechanics, 2019, 40(5): 1649-1656.
[15] SU Guo-shao, YAN Si-zhou, YAN Zhao-fu, ZHAI Shao-bin, YAN Liu-bin, . Evolution characteristics of acoustic emission in rockburst process under true-triaxial loading conditions [J]. Rock and Soil Mechanics, 2019, 40(5): 1673-1682.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] LI Ying-yong，ZHANG Ding-li，ZHANG Hong-bo，SONG Xiu-guang. Research on failure mechanism and effects of prestressed anchor cables for reinforcing slopes[J]. , 2010, 31(1): 144 -150 .
[2] LI Jing，MIAO Lin-chang，ZHONG Jian-chi，FENG Zhao-xiang. Deformation and damping characteristics of EPS beads-mixed lightweight soil under repeated load-unloading[J]. , 2010, 31(6): 1769 -1775 .
[3] LIANG Jian-wei, FANG Ying-guang, GU Ren-guo. Analysis of microelectric field effect of seepage in tiny-particle clay[J]. , 2010, 31(10): 3043 -3050 .
[4] LI Xiu-zhen，WANG Cheng-hua，DENG Hong-yan. A comparison of distance and Fisher discrimination methods applied to identifying potential landslides[J]. , 2011, 32(1): 186 -192 .
[5] JI Wu-jun. Investigation and analysis of engineering problems for loess tunnels[J]. , 2009, 30(S2): 387 -390 .
[6] CHEN Li-hua , LIN Zhi , LI Xing-ping. Study of efficacy of systematic anchor bolts in highway tunnels[J]. , 2011, 32(6): 1843 -1848 .
[7] ZHENG Gang ZHANG Li-ming DIAO Yu. Analysis of working performance of piles beneath excavation bottom and settlement calculation[J]. , 2011, 32(10): 3089 -3096 .
[8] ZHAO Ming-hua, LEI Yong, ZHANG Rui. Study of punching failure mode and safe thickness of pile foundation in karst region[J]. , 2012, 33(2): 524 -530 .
[9] WANG Yu ，JIA Zhi-gang ，LI Xiao ，WANG Can ，YU Hong-ming . Fuzzy random reliability analysis of slope based on fuzzy point estimate method[J]. , 2012, 33(6): 1795 -1800 .
[10] TAN Zhong-sheng , LI Jian , ZHUO Yue , ZHANG Peng . Test study of waterproof effect of nonwoven fabrics on subsea tunnel lining[J]. , 2012, 33(7): 1927 -1932 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd