(1河海大学土木工程学院 南京 210098) (2中国科学院武汉岩土力学研究所 武汉 430071) (3 Laboratoire de Mechanique de Lille Villeneuve d’Ascq Cedex France)
TIME-EFFECTIVE MODEL OF SEDIMENTARY ROCKS
Yu Tiantang1，Lu Yingfa2，Shao J F 3
(1 College of Civil Engineering，Hohai University，Nanjing 210098 China) (2 Institute of Rock and Soil Mechanics，The Chinese Academy of Sciences，Wuhan 430071 China) (3 Laboratoire de Mechanique de Lille，Villeneuve d’Ascq Cedex，France)
Abstract：A time-effective model of sedimentary rocks is presented. The inherent anisotropy of this kind of materials is described with a scalar anisotropy parameter. The time effect is considered with a damage factor. The uniaxial compressive strength is the function of time，microstructure tensor and stress. A complete plasticity model describing the deformation process in anisotropic sedimentary rocks is given. Several triaxial tests are simulated with the presented model，the results show the inherent anisotropy and time-dependent behavior in sedimentary rocks can be efficiently described with the model.
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2002, Vol. 21 
