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Orthotropic Anisotropic Damage Coupled Modeling of Saturated Porous Rock
Natural rock mass is anisotropic and its failing type is also non‐isotropic, research into anisotropic mechanical behaviors of rock is of great importance. In this paper, an orthotropic elastic damage model has been proposed, in this model, the elastic deformation, the damaged deformation and irreversible deformation can be identified respectively. A second rank damage tensor is employed to characterize the induced damage; damage evolution is related to the propagation conditions of microcracks. A specific form of the Gibbs free energy function is used to obtain the effective elastic stiffness; the limited scopes of relative damage parameters are suggested. A method of all the model parameter determination is proposed by virtue of conventional tri‐axial laboratory test. The mechanical behaviors of different loading paths are described; the comparison between test data and numerical simulations shows an overall good agreement. Then, the model is used to simulate the coupled hydraulic mechanical responses in different loading paths; the numerical results also show the proposed model is suited to describe the main features of poro‐mechanical behaviors and traction in rock.
Orthotropic Anisotropic Damage Coupled Modeling of Saturated Porous Rock
Natural rock mass is anisotropic and its failing type is also non‐isotropic, research into anisotropic mechanical behaviors of rock is of great importance. In this paper, an orthotropic elastic damage model has been proposed, in this model, the elastic deformation, the damaged deformation and irreversible deformation can be identified respectively. A second rank damage tensor is employed to characterize the induced damage; damage evolution is related to the propagation conditions of microcracks. A specific form of the Gibbs free energy function is used to obtain the effective elastic stiffness; the limited scopes of relative damage parameters are suggested. A method of all the model parameter determination is proposed by virtue of conventional tri‐axial laboratory test. The mechanical behaviors of different loading paths are described; the comparison between test data and numerical simulations shows an overall good agreement. Then, the model is used to simulate the coupled hydraulic mechanical responses in different loading paths; the numerical results also show the proposed model is suited to describe the main features of poro‐mechanical behaviors and traction in rock.
Orthotropic Anisotropic Damage Coupled Modeling of Saturated Porous Rock
Shao, Jian‐Fu (editor) / Burlion, Nicolas (editor) / Lu, Y. F. (author) / Liu, D. F. (author)
2013-02-19
16 pages
Article/Chapter (Book)
Electronic Resource
English
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