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, and the acoustic emission characteristics were monitored. The results show that there is a difference between the failure modes of anchorless sandstone and that of anchored sandstone. Unanchored... a relative active acoustic emission activity at the early stage of loading, which makes the energy of the system fully release and is more difficult to store the elastic strain energy. The energy released......
and INSTRON1346 servo-testing machine under pure mode I loading conditions. During the test, the crack propagation process was recorded by high-speed (HS) camera, and the acoustic emission (AE) signal generated by the fracture was collected by acoustic emission (AE) system. At the same time, crack propagation gauge (CPG) was used to measure the crack propagation velocity of the specimen. The results......
)07-2757-05 Acoustic full wave logging of karst foundation grouting effect evaluation XIE Zhong-qiu1, ZHANG Yu-chi2, XIAO Hong-bin1, FAN Jin-zhao1 (1. Department of Civil Engineering, Central South... grouting, acoustic full wave logging images were used to analysis development of joint and cracks, fracture zones and mortar filling near the drilling based on the theory analysis and numerical......
J. Cent. South Univ. (2021) 28: 1724-1736 DOI: https://doi.org/10.1007/s11771-021-4729-3 Stress-strain-acoustic responses in failure process of coal rock with different height to diameter ratios...) were performed, and the stress, strain and acoustic emission (AE) were monitored. Results show that the uniaxial compressive strength (UCS) and peak strain increase with H/D decreasing. An empirical......
; 文献标志码:A 文章编号:1672-7207(2018)06-1465-07 Experiment research on damage mechanism and acoustic emission characteristics of rock... of stress drop phenomenon in the rupture process, acoustic emission ringing count rate would abruptly increase in every time that stress drop occurs. In addition, the damage degree of jointed rock......
:A 文章编号:1672-7207(2015)04-1482-07 Experimental research on relationship between frequency characteristics of acoustic emission and strength parameter... testing process was monitored synchronously through the acoustic emission (AE) system. The relationship between frequency characteristics parameters of acoustic emission signals and the strength parameters......
and analyzing acoustic emission data, values of displacement and failure process sketch of lining segments. The results indicate that the existence of cracks reduces the overall stiffness of structure...; similar model; acoustic emission; failure mode 衬砌裂损是山岭隧道的主要病害形式,裂缝的存在降低了衬砌截面的极限承载力和衬砌结构的刚度,引起结构内力重分布.杨亚新等[1]采用荷载-结构法从承载性能及安全性能分析了纵向裂缝对衬砌结构的影响;于玲等[2]结合现场检测及数值模拟,对比分析了山岭隧道衬砌裂损及加固方法.国内学者针对山岭隧道复合式衬砌展开了大量的研究,而对......
of layered sandstone based on acoustic emission experiments LIU Yunsi1, 2, WANG Shiming2, YAN Shijun2, FU Helin3, CHEN Chen3, SHI Yue3, YUE Jian2 (1. Key Laboratory of Geotechnical Engineering for Stability... mass under the influence of bedding plane, the acoustic emission technology was used to carry out the uniaxial and Brazil split tests of sandstone. The tensile and compressive strength distribution......
mass, the compression shear test loading on the parallel jointed specimens was carried out, and the acoustic emission system was used to monitor the loading process. The results show that: 1) Under... stage; the variation of the acoustic emission count for different joint inclination samples corresponds to the failure mode of specimen. The stress-displacement curves of different overlapping specimens......
precision about happening rate of acoustic emission in mine, the happening rate of acoustic emission in mine was forecasted based on functional link neural network due to fuzzy adaptive variable weight algorithm by using of making some forecasting values from different single forecasting model of happening rate of acoustic emission in mine as original input values of functional link neural network......