循环荷载下岩石损伤的CT细观试验研究
|
摘要
利用CT机专用加载试验设备,进行实时的两级循环荷载作用下岩石疲劳损伤演化CT细观试验,得到岩石细观疲劳损伤扩展的初步规律。研究表明:一级循环荷载为强度的38%～76%时,随着循环次数的增加,上限应力处全区CT数标准差有增加的趋势,密度和CT数有减小的趋势,但变化很小,说明这一过程损伤的积累是缓慢的;二级循环荷载为强度的45%～90%时,虽然试验时循环次数少于一级循环荷载,但上限应力处全区CT数标准差、密度和CT数变化要大于一级循环荷载;在岩石破坏前的1个循环,CT数标准差、密度和CT数有较大变化。
The computerized tomography(CT) real-time tests of fatigue damage meso-propagation law of rock under two-grade cyclic loads have been accomplished using specified loading equipment of CT machine. It is shown that in the first grade of cyclic load equal to the strength of 38% to 76%,the standard deviation of CT number under the maximum stress increases with the increase of the number of cycle;while the density and CT number tend to decrease with relatively small variations. The process shows that the accumulation of damage is slow. In the second grade of cycle load equal to the strength of 45% to 90%,although the number of cycle is less than that in the first grade,the changes of standard deviation of CT number under the maximum stress,density and CT number are larger than those in the first grade;in the cycle before failure,the standard deviations of CT number,density and CT number change greatly.
The computerized tomography(CT) real-time tests of fatigue damage meso-propagation law of rock under two-grade cyclic loads have been accomplished using specified loading equipment of CT machine. It is shown that in the first grade of cyclic load equal to the strength of 38% to 76%,the standard deviation of CT number under the maximum stress increases with the increase of the number of cycle;while the density and CT number tend to decrease with relatively small variations. The process shows that the accumulation of damage is slow. In the second grade of cycle load equal to the strength of 45% to 90%,although the number of cycle is less than that in the first grade,the changes of standard deviation of CT number under the maximum stress,density and CT number are larger than those in the first grade;in the cycle before failure,the standard deviations of CT number,density and CT number change greatly.
引文
[1]蒋宇,葛修润,任建喜.岩石疲劳破坏过程中的变形规律及声发射特性[J].岩石力学与工程学报,2004,23(11):1810–1814.(JIANG Yu,GE Xiurun,REN Jianxi.Deformation rules and acoustic emission characteristics of rocks in process of fatigue failure[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(11):1810–1814.(in Chinese))
[2]蒋宇.周期荷载作用下岩石疲劳破坏及变形发展规律[博士学位论文][D].上海:上海交通大学,2003.(JIANG Yu.Fatigue failure and deformation development law of rock under cyclic load[Ph.D.Thesis][D].Shanghai:Shanghai Jiaotong University,2003.(in Chinese))
[3]席道瑛,薛彦伟,宛新林.循环载荷下饱和砂岩的疲劳损伤[J].物探化探计算技术,2004,26(3):193–198.(XI Daoying,XUE Yanwei,WAN Xinlin.The damage of saturated sandstones under cyclic loading[J].Computing Techniques for Geophysical and Geochemical Exploration,2004,26(3):193–198.(in Chinese))
[4]CNUDDE V,MASSCHAELE B,DIERICK M,et al.Recent progress in X-ray CT as a geosciences tool[J].Applied Geochemistry,2006,21(5):826–832.
[5]HIRONO T,TAKAHASHI M,NAKASHIMA.S.In-situ visualization of fluid flow image within deformed rock by X-ray CT[J].Engineering Geology,2003,70(1/2):64–73.
[6]HIRONO T,TAKAHASHI M,NAKASHIMA S.Mathematical programs for the analysis of three-dimensional pore connectivity and anisotropic tortuosity of porous rocks using X-ray computerized tomography image data[J].Journal of Nuclear Science and Technology,2007,44(9):1233–1247.
[7]LOUIS L,WONG T F,BAUD P,et al.Imaging strain localization by X-ray computed tomography:discrete compaction bands in Diemelstadt sandstone[J].Journal of Structural Geology,2006,28(5):762–775.
[8]VINEGAR H J,DE WAAL J A,WELLINGTON S L.CT studies of brittle failure in castlegate sandstone[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,1991,28(5):441–450.
[9]KAWAKATA H,CHO A,YANAGIDANI T,et al.Observations of faulting in westerly granite under triaxial compression by X-ray CT scan[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(3):151–162.
[10]CHO S H,KUBOTA T S,OGATA Y,et al.Microscopic visualization of a granitic rock subject to dynamic tensile loading by using a micro X-ray CT system[J].Science and Technology of Energetic Materials,2005,66(4):334–339.
[11]SUZANNE R,DOMINIQUE N T,JACQUES D,et al.Brittle-to-ductile transition in Beaucaire marl from triaxial tests under the CT-scanner[J].International Journal of Rock Mechanics and Mining Sciences,2008,45(5):653–671.
[12]GE X,REN J,PU Y,et al.Real-in time CT test of the rock meso-damage propagation law[J].Science in China(Series E:Technological Sciences),2001,44(3):328–336.
[13]FENG X T,CHEN S L,ZHOU H.Real-time computerizedtomography(CT)experiments on sandstone damage evolution during triaxial compression with chemical corrosion[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(2):181–192.
[14]REN J X.Real-time computerized tomography(CT)test of failure process of jointed granite under unloading in the Three Gorges Project(TGP)[J].Journal of Coal Science and Engineering,2004,10(2):11–14.
[15]葛修润,任建喜,蒲毅彬,等.煤岩三轴细观损伤演化规律的CT动态试验[J].岩石力学与工程学报,1999,18(5):497–502.(GE Xiurun,REN Jianxi,PU Yibin,et al.A real-in-time CT triaxial testing study of meso-damage evolution law of coal[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(5):497–502.(in Chinese))
[16]任建喜,葛修润,蒲毅彬,等.岩石卸荷损伤演化机制CT实时分析初探[J].岩石力学与工程学报,2000,19(6):697–701.(REN Jianxi,GE Xiurun,PU Yibin,et al.Primary study of real-time CT testing of unloading damage evolution law of rock[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(6):697–701.(in Chinese))
[17]任建喜,葛修润,杨更社.单轴压缩岩石损伤扩展细观机制CT实时试验[J].岩土力学,2001,22(2):130–133.(REN Jianxi,GE Xiurun,YANG Gengshe.CT Real-time testing on damage propagation microscopic mechanism of rock under uniaxial compression[J].Rock and Soil Mechanics,2001,22(2):130–133.(in Chinese))
[18]仵彦卿,丁卫华.单轴条件下砂岩三维破裂过程的CT观测[J].工程地质学报,2002,10(1):93–97.(WU Yanqing,DING Weihua.X-ray CT observation on three-dimensional fracturing process of sandstone specimen under uniaxial condition[J].Journal of Engineering Geology,2002,10(1):93–97.(in Chinese))
[19]仵彦卿,曹广祝,王殿武.基于X-射线CT方法的岩石小裂纹扩展过程分析[J].应用力学学报,2005,22(3):484–490.(WU Yanqing,CAO Guangzhu,WANG Dianwu.Micro-fracturing processes of rock by real-time observation of X-ray CT[J].Chinese Journal of Applied Mechanics,2005,22(3):484–490.(in Chinese))
[20]葛修润,任建喜,蒲毅彬,等.岩石疲劳损伤扩展规律CT细观分析初探[J].岩土工程学报,2001,23(2):191–195.(GE Xiurun,REN Jianxi,PU Yibin,et al.Primary study of CT real-time testing of fatigue meso-damage propagation law of rock[J].Chinese Journal of Geotechnical Engineering,2001,23(2):191–195.(in Chinese))
[21]张晖辉,颜玉定,余怀忠,等.循环载荷下大试件岩石破坏声发射试验——岩石破坏前兆的研究[J].岩石力学与工程学报,2004,23(21):3621–3628.(ZHANG Huihui,YAN Yuding,YU Huaizhong,et al.Acoustic emission experimental research on large-scale rock failure under cycling load—fracture precursor of rock[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3621–3628.(in Chinese))
[22]余怀忠,尹祥础,夏蒙棼,等.加卸载响应比(LURR)理论的试验研究[J].中国地震,2003,19(1):58–66.(YU Huaizhong,YIN Xiangchu,XIA Mengfen,et al.Experimental research on the theory of LURR(load/unload response ratio)[J].Earthquake Research in China,2003,19(1):58–66.(in Chinese))
[2]蒋宇.周期荷载作用下岩石疲劳破坏及变形发展规律[博士学位论文][D].上海:上海交通大学,2003.(JIANG Yu.Fatigue failure and deformation development law of rock under cyclic load[Ph.D.Thesis][D].Shanghai:Shanghai Jiaotong University,2003.(in Chinese))
[3]席道瑛,薛彦伟,宛新林.循环载荷下饱和砂岩的疲劳损伤[J].物探化探计算技术,2004,26(3):193–198.(XI Daoying,XUE Yanwei,WAN Xinlin.The damage of saturated sandstones under cyclic loading[J].Computing Techniques for Geophysical and Geochemical Exploration,2004,26(3):193–198.(in Chinese))
[4]CNUDDE V,MASSCHAELE B,DIERICK M,et al.Recent progress in X-ray CT as a geosciences tool[J].Applied Geochemistry,2006,21(5):826–832.
[5]HIRONO T,TAKAHASHI M,NAKASHIMA.S.In-situ visualization of fluid flow image within deformed rock by X-ray CT[J].Engineering Geology,2003,70(1/2):64–73.
[6]HIRONO T,TAKAHASHI M,NAKASHIMA S.Mathematical programs for the analysis of three-dimensional pore connectivity and anisotropic tortuosity of porous rocks using X-ray computerized tomography image data[J].Journal of Nuclear Science and Technology,2007,44(9):1233–1247.
[7]LOUIS L,WONG T F,BAUD P,et al.Imaging strain localization by X-ray computed tomography:discrete compaction bands in Diemelstadt sandstone[J].Journal of Structural Geology,2006,28(5):762–775.
[8]VINEGAR H J,DE WAAL J A,WELLINGTON S L.CT studies of brittle failure in castlegate sandstone[J].International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts,1991,28(5):441–450.
[9]KAWAKATA H,CHO A,YANAGIDANI T,et al.Observations of faulting in westerly granite under triaxial compression by X-ray CT scan[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(3):151–162.
[10]CHO S H,KUBOTA T S,OGATA Y,et al.Microscopic visualization of a granitic rock subject to dynamic tensile loading by using a micro X-ray CT system[J].Science and Technology of Energetic Materials,2005,66(4):334–339.
[11]SUZANNE R,DOMINIQUE N T,JACQUES D,et al.Brittle-to-ductile transition in Beaucaire marl from triaxial tests under the CT-scanner[J].International Journal of Rock Mechanics and Mining Sciences,2008,45(5):653–671.
[12]GE X,REN J,PU Y,et al.Real-in time CT test of the rock meso-damage propagation law[J].Science in China(Series E:Technological Sciences),2001,44(3):328–336.
[13]FENG X T,CHEN S L,ZHOU H.Real-time computerizedtomography(CT)experiments on sandstone damage evolution during triaxial compression with chemical corrosion[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(2):181–192.
[14]REN J X.Real-time computerized tomography(CT)test of failure process of jointed granite under unloading in the Three Gorges Project(TGP)[J].Journal of Coal Science and Engineering,2004,10(2):11–14.
[15]葛修润,任建喜,蒲毅彬,等.煤岩三轴细观损伤演化规律的CT动态试验[J].岩石力学与工程学报,1999,18(5):497–502.(GE Xiurun,REN Jianxi,PU Yibin,et al.A real-in-time CT triaxial testing study of meso-damage evolution law of coal[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(5):497–502.(in Chinese))
[16]任建喜,葛修润,蒲毅彬,等.岩石卸荷损伤演化机制CT实时分析初探[J].岩石力学与工程学报,2000,19(6):697–701.(REN Jianxi,GE Xiurun,PU Yibin,et al.Primary study of real-time CT testing of unloading damage evolution law of rock[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(6):697–701.(in Chinese))
[17]任建喜,葛修润,杨更社.单轴压缩岩石损伤扩展细观机制CT实时试验[J].岩土力学,2001,22(2):130–133.(REN Jianxi,GE Xiurun,YANG Gengshe.CT Real-time testing on damage propagation microscopic mechanism of rock under uniaxial compression[J].Rock and Soil Mechanics,2001,22(2):130–133.(in Chinese))
[18]仵彦卿,丁卫华.单轴条件下砂岩三维破裂过程的CT观测[J].工程地质学报,2002,10(1):93–97.(WU Yanqing,DING Weihua.X-ray CT observation on three-dimensional fracturing process of sandstone specimen under uniaxial condition[J].Journal of Engineering Geology,2002,10(1):93–97.(in Chinese))
[19]仵彦卿,曹广祝,王殿武.基于X-射线CT方法的岩石小裂纹扩展过程分析[J].应用力学学报,2005,22(3):484–490.(WU Yanqing,CAO Guangzhu,WANG Dianwu.Micro-fracturing processes of rock by real-time observation of X-ray CT[J].Chinese Journal of Applied Mechanics,2005,22(3):484–490.(in Chinese))
[20]葛修润,任建喜,蒲毅彬,等.岩石疲劳损伤扩展规律CT细观分析初探[J].岩土工程学报,2001,23(2):191–195.(GE Xiurun,REN Jianxi,PU Yibin,et al.Primary study of CT real-time testing of fatigue meso-damage propagation law of rock[J].Chinese Journal of Geotechnical Engineering,2001,23(2):191–195.(in Chinese))
[21]张晖辉,颜玉定,余怀忠,等.循环载荷下大试件岩石破坏声发射试验——岩石破坏前兆的研究[J].岩石力学与工程学报,2004,23(21):3621–3628.(ZHANG Huihui,YAN Yuding,YU Huaizhong,et al.Acoustic emission experimental research on large-scale rock failure under cycling load—fracture precursor of rock[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3621–3628.(in Chinese))
[22]余怀忠,尹祥础,夏蒙棼,等.加卸载响应比(LURR)理论的试验研究[J].中国地震,2003,19(1):58–66.(YU Huaizhong,YIN Xiangchu,XIA Mengfen,et al.Experimental research on the theory of LURR(load/unload response ratio)[J].Earthquake Research in China,2003,19(1):58–66.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心