Double-Medium Constitutive Model of Geological Material in Uniaxial Tension and Compression

LIU Xiao-li; WANG Si-jing; WANG En-zhi; XUE Qiang

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LIU Xiao-li, WANG Si-jing, WANG En-zhi, XUE Qiang. Double-Medium Constitutive Model of Geological Material in Uniaxial Tension and Compression[J]. Applied Mathematics and Mechanics, 2006, 27(10): 1193-1201.

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Double-Medium Constitutive Model of Geological Material in Uniaxial Tension and Compression

1.
Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, P. R. China;

Received Date: 2005-04-05
Rev Recd Date: 2006-06-03
Publish Date: 2006-10-15

Abstract

Abstract

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 being pore-fracture double-medium, and porous medium occurring no damage, while fracture medium occurring damage 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 separating 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.
- rock and soil materials,
- geological materials,
- double-medium,
- constitutive model,
- damage

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References(14)

References

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