Numerical modelling of coupled flow and deformation in fractured rock specimens
Numerical modelling of coupled flow and deformation in fractured rock specimens
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DOI：
10.1002/(sici)1096-9853(199902)23:2
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发表时间：
1999-02
影响因子：
4
通讯作者：
M. Bai;F. Meng;D. Elsworth;Y. Abousleiman;J. Roegiers
中科院分区：
文献类型：
--
作者：
M. Bai;F. Meng;D. Elsworth;Y. Abousleiman;J. Roegiers
一个双孔隙度多孔弹性模型扩展到表示在圆柱形坐标的行为，在圆柱形的实验室样品纳入一个中心井眼或非重复的轴对称注射的周边上的流动变形效应的评价。九节点的二次元素被用来表示机械变形，而八节点的线性元素被用来插值的压力场，这提供了显着的优势，其他非协调元素的行为。对简化的分析结果，并扩展到描述的行为进行控制的三轴应力状态和注射试验的均质和非均质的实验室标本提出的模型进行了验证。从结果中可以明显看出，应力-变形效应对系统行为有显著影响。版权所有© 1999 John Wiley & Sons，Ltd。
A dual-porosity poroelastic model is extended to represent behaviour in cylindrical co-ordinates for the evaluation of flow-deformation effects in cylindrical laboratory samples incorporating a central wellbore or non-repeating axisymmetric injection on the periphery. Nine-node quadratic elements are used to represent mechanical deformation, while eight-node linear elements are used to interpolate the pressure fields, which offers significant advantages over the behaviour of other non-conforming elements. The model presented is validated against simplified analytical results, and extended to describe the behaviour of homogeneous and heterogeneous laboratory specimens subjected to controlled triaxial state of stress and injection tests. Apparent from the results is the significant influence of stress-deformation effects over system behaviour. Copyright © 1999 John Wiley & Sons, Ltd.