【摘 要】
:
Based on elasto-plasticity and damage mechanics, a double-medium constitutive model of geological material under uniaxial tension and compression was presented,
【机 构】
:
Department of Hydraulic and Hydropower Engineering,Institute of Geology and Geophysics of the Chines
【基金项目】
:
国家自然科学基金;the National Key Project of the Tenth Five-Year Plan of China
论文部分内容阅读
Based on elasto-plasticity and damage mechanics, a double-medium constitutive model of geological material under uniaxial tension and compression was presented,on the assumption that rock and soil materials are the pore-fracture double-medium, and porous medium has no damage occurring, while fracture medium has damage occurring with load. To the implicit equation of the model, iterative method was adopted to obtain the complete stress-strain curve of the material. The result shows that many different distributions (uniform distribution, concentrated distribution and random distribution)of fractures in rock and soil material are the essential reasons of the daedal constitutive relations. By the reason that the double-medium constitutive model separates the material to be porous medium part, which is the main body of elasticity, and fracture medium part, which is the main body of damage, it is of important practical values and theoretical meanings to the study on failure of rock and soil or materials containing damage.
其他文献
Based on yon Karman plate theory, the issue about nonlinear vibration for circular sandwich plates under circumjacent load with the loosely clamped boundary con
Exact solution of the nonlinear boundary value problem for the basic equation and boundary condition of circular membrane under central force was obtained by us
A new nonlinear wave equation of a finite deformation elastic circular rod simultaneously introducing transverse inertia and shearing strain was derived by mean
One type of evolution atmosphere equations was discussed. It is found that according to the stratification theory, (i) the inertial force has no influence on th
A new direct method for solving unsymmetrical sparse linear systems(USLS)arising from meshless methods was introduced. Computation of certain meshless methods s
The USM-θ model of Bingham fluid for dense two-phase turbulent flow was developed, which combines the second-order moment model for two-phase turbulence with t
The analytical solutions of the stresses and displacements were obtained for fixed-fixed anisotropic beams subjected to uniform load. A stress function involvin
Poisson-Boltzmann equation for EDL (electric double layer) and NavierStokes equation for liquid flows were numerically solved to investigate resistance effect o
The polynomial type Lagrange equation and Hamilton equation of finite dimensional constrained dynamics were considered. A newalgorithm was presented for solving