Non-linear Creep Model Based on Plasticity Strengthening and Viscosity Weakening of Rock
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摘要: 为更好地描述岩石蠕变行为,特别是第2和第3期蠕变过程,基于岩石蠕变机理,在粘塑性元件中引入塑性强化函数和粘性弱化函数,建立了岩石的非线性蠕变模型.对圆柱形砂岩试样进行的单轴压缩蠕变试验表明,所建立的模型对试验数据的拟合程度较高(相关系数达0.98),能较好地描述岩石蠕变的全过程.Abstract: To more reasonably describe the creep behavior of rock,especially the 2nd and 3rd stages of rock creep,a non-linear creep model of rock was established based on the creep mechanism of rock and introducing a plasticity strengthening function and a viscosity weakening function into the visco-plasticity model.The result of a creep experiment on cylindrical sandstone specimens under uniaxial compression shows that the established model can fits the experimental result well,the correlation coefficients being greater than 0.98.The non-linear creep model can describe the whole process of rock creep exactly.
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孙钧.岩土材料流变及工程应用[M].北京:中国建筑工业出版社,1999:562-566.[2] 金丰年,浦奎英.关于黏弹性模型的讨论[J].岩石力学与工程学报,1995,14(4):335-361.JIN Fengnian,PU Kuiying.Discussion on visco-elastic models[J].Chinese Journal of Rock Mechanics and Engineering,1995,14(4):335-361.[3] 曹树刚,边金,李鹏.岩石蠕变本构关系及改进的西原正夫模型[J].岩石力学与工程学报,2002,21(5):632-634.CAO Shugang,BIAN Jin,LI Peng.Rheologic constitutive relationship of rocks and a modified model[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(5):632-634.[4] 张向东,李永靖,张树光,等.软岩蠕变理论及其工程应用[J].岩石力学与工程学报,2004,23(10):1 635-1 639.ZHANG Xiangdong,LI Yongjing,ZHANG Shuguang,et al.Creep theory of soft rock and its engineering application[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(10):1 635-1 639.[5] 王来贵,何峰,刘向峰,等.岩石试件非线性蠕变模型及其稳定性分析[J].岩石力学与工程学报,2004,23(10):1 640-1 642.WANG Laigui,HE Feng,LIU Xiangfeng,et al.Nonlinear creep model and stability analysis of rock[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(10):1 640-1 642.[6] 邓荣贵,周德培,张倬元,等.一种新的岩石流变模型[J].岩石力学与工程学报,2001,20(6):780-784.DENG Ronggui,ZHOU Depei,ZANG Zhuoyuan,et al.A new rheological model for tocks[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(6):780-784.[7] BOUKHAROV G N,CHANDA M W.The three processes of brittle crystalline rock creep[J].International Journal of Rock Mechanics:Mining Sciences and Geomechanics Abstracts,1995,32(4):325-335.[8] 徐卫亚,杨圣奇,褚卫江.岩石非线性黏弹塑性流变模型(河海模型)及其应用[J].岩石力学与工程学报,2006,25(3):433-447.XU Weiya,YANG Shengqi,CHU Weijiang.Nonlinear viscoelasto-plastic rheological model (Hohai model) of rock and its engineering application[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(3):433-447.[9] 陈沅江,潘长良,曹平,等.软岩流变的一种新力学模型[J].岩土力学,2003,24(2):209-214.CHEN Yuanjiang,PAN Changliang,CAO Ping et al.A new mechanical model for soft rock rheology[J].Rock and Soil Mechanics,2003,24(2):209-214.[10] 范庆忠,高延法,崔希海.软岩非线性蠕变模型研究[J].岩土工程学报,2007,29(4):505-509.FAN Qingzhong,GAO Yanfa,CUI Xihai,et al.Study on nonlinear creep model of soft rock[J].Chinese Journal of Geotechnical Engineering,2007,29(4):505-509.[11] 杨彩红,李剑光.非均匀软岩蠕变机理分析[J].采矿与安全工程学报,2006,23(4):476-479.YANG Caihong,LI Jianguang.Analysis of creeping mechanisms of non-uniformity soft rocks[J].Journal of Mining and Safety Engineering,2006,23(4):476-479.[12] 杨绪灿,杨桂通,徐秉业.粘塑性力学概论[M].北京:中国铁道出版社,1987:153-154.[13] 金尧,孙训方,孙亚方,等.考虑加载历史影响的蠕变律[J].机械强度,2001,23(2):206-208.JIN Yao,SUN Xunfang,SUN Yafang,et al.Creep law with effect of loading history[J].Journal of Mechanical Strength,2001,23(2):206-208.[14] 罗润林,阮怀宁,孙运强,等.一种非定常参数的岩石蠕变本构模型[J].桂林工学院学报,2007,27(2):200-203.LUO Runlin,RUAN Huaining,SUN Yunqiang,et al.A non-stationary parameter creep constitutive model of rock[J].Journal of Guilin University of Technology,2007,27(2):200-203.
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