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He Hongliang;Thomas J.Ahren;Allan M.Rubin(Laboratory for shock Wave and Detonation Physics,Southwest Institute of Fluid Physics,P. O. Box 523,Chengdu,610003)(Lindhurst Laboratory of Experimental Geophysics, Seismological Laboratory, California Institute o  
A definition of shock damage parameter,D=1-(c_p/c_(po)) ̄2,is propased for rock-like brittle materials,where c_(po) and c_p are elastic longitudinal wave velocities of unshocked andshocked materials,respoctively. Fullowing this definition,damage distribbutions in shocked Gabroand Limestone were experimentally miasured,,in which c_p values were measured by an ultrasonictransmission technique,For shock damaged gabbro, the characteristics of elastic longitudinal wavevelocity and com pressive strength under quasistatic uniaxial loading are also studied.In all thetested samples(with different initial damage parameter) a large increment of elastic velocities areobserved under the stresses ranging from 0 to 50 MPa. We suspect this behaviour is due to a mi-crocracks(induced by the shock loading ) re-closing process.After microcracks re-closing,theshocked gabbror with initial damage D_00.1 have nearly the same elastic wave velocities andcompressive strengthes as the unshocked ones.For the samples with initial damage D_00.1 ,how-ever.their values are much reduced and could not be rebounded to the intrinsic values.
【CateGory Index】: TU452
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1 XU Zhong;DENG Hui;LU Ping;PENG Liangtian;WAN Ke;LEI Pengbo;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology;Sichuan Xuda Railway Co.,Ltd.;;Study on cumulative blasting damage effect on surrounding rock of tunnel excavated with drilling-blasting method[J];水利水电技术;2018-02
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4 FANG Zheng-feng;ZOU Fei;TANG Xu;School of Resources and Enviromental Engineering,Guizhou University;Guizhou Transportation Planning Survey & Design Academe Co.,Ltd.;Communications Construction Engineering Quality Supervision Bureau of Guizhou Province;;SHPB experiment on dynamic compressive mechanical properties of limestone and dolomite[J];工程爆破;2017-01
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8 ZHANG Yun-peng;YANG Xi;CHEN Chao;North China Polytechnic Institute,Hebei Provincial Key Laboratory of Mine Development and Safety Technology;;Study of numerical simulation of damage law on backfill at different impact velocities[J];化工矿物与加工;2016-07
9 DANG Kangning;YAN Bo;LIU Yunhe;Institute of Water Resources and Hydro-electric Engineering,Xi'an University of Technology;;Analysis of the seismic response for high slope with special fractured rock[J];中国科技论文;2016-07
10 Li Zheng;Liu Yuan-xue;Tan Yi-zhong;Zhang Yu;Dept. of Civil Engineering,LEU;Chongqing Key Laboratory of Geomechanics & Geoenvironmental Protection,LEU;;Damage Property of Tungsten-alloy Kinetic Energy Projectile Hypervelocity Penetrating into Steel Target[J];后勤工程学院学报;2016-01
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