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《Chinese Journal of Underground Space and Engineering》 2013-03
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Multiparameter Constitutive Model of Rock Damage under Uniaxial Loading

Mo You1,Zeng Yusheng1,Li Jian2,Xu Ke2,Guo Zihong1(1.Urban and Rural Construction College,Sichuan Agricultural University,Dujiangyan,Sichuan 611830,China; 2.College of Civil Engineering and Urban Construction,Jiujiang University,Jiujiang,Jiangxi 332005,China)  
Based on acoustic emission test under uniaxial loading,a constitutive model of multiparameter damage is set up with acoustic emission and plastic volumetric strain serving as damage variable,and the rock's damage trend is studied.The results are as following: Firstly,constitutive model of rock damage is accordant with testing result well.Before peak strength the theoretical results are bigger than testing results,and then the theoretical results decrease faster.Rock's damage is keeping increasing when rock's axial strain is increasing.Before reaching rock's peak strength,its damage is keeping increasing with axial stress increasing,but behind rock's peak strength,when axial stress decreases rock's damage keep increasing.The rock's stress-strain curve and damage,obtained from multiparameter constitutive model of damage,can embody the trend of acoustic emission and plastic volumetric strain.
【Fund】: 四川省教育厅资助科研项目(11ZB055);; 四川省农村发展研究中心项目(CR1220)
【CateGory Index】: TU452
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