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Study on the constitutive model for jointed rock mass.

Xu Q, Chen J, Li J, Zhao C, Yuan C - PLoS ONE (2015)

Bottom Line: The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses.Some numerical examples are given to analyze and verify the proposed constitutive model.The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

View Article: PubMed Central - PubMed

Affiliation: School of Civil and Hydraulic Eng., Dalian University of Technology, Dalian, China.

ABSTRACT
A new elasto-plastic constitutive model for jointed rock mass, which can consider the persistence ratio in different visual angle and anisotropic increase of plastic strain, is proposed. The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses. Some numerical examples are given to analyze and verify the proposed constitutive model. The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

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Related in: MedlinePlus

The FE model of the beam
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pone.0121850.g016: The FE model of the beam

Mentions: Fig 16 shows the plane strain model(FE with 4-nodes) for a rectangle beam (length = 4m, width = 2m) of jointed rock mass subjected to uniform load p = 0.45MPa. Both sides of beam are restraint against displacement. The visual angle β0 = 120°. The beam is calculated by proposed constitutive model and ubiquitous-joint constitutive model in commercial software Abaqus, respectively. Table 4 shows the physical parameters of the rectangle beam.


Study on the constitutive model for jointed rock mass.

Xu Q, Chen J, Li J, Zhao C, Yuan C - PLoS ONE (2015)

The FE model of the beam
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4401509&req=5

pone.0121850.g016: The FE model of the beam
Mentions: Fig 16 shows the plane strain model(FE with 4-nodes) for a rectangle beam (length = 4m, width = 2m) of jointed rock mass subjected to uniform load p = 0.45MPa. Both sides of beam are restraint against displacement. The visual angle β0 = 120°. The beam is calculated by proposed constitutive model and ubiquitous-joint constitutive model in commercial software Abaqus, respectively. Table 4 shows the physical parameters of the rectangle beam.

Bottom Line: The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses.Some numerical examples are given to analyze and verify the proposed constitutive model.The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

View Article: PubMed Central - PubMed

Affiliation: School of Civil and Hydraulic Eng., Dalian University of Technology, Dalian, China.

ABSTRACT
A new elasto-plastic constitutive model for jointed rock mass, which can consider the persistence ratio in different visual angle and anisotropic increase of plastic strain, is proposed. The proposed the yield strength criterion, which is anisotropic, is not only related to friction angle and cohesion of jointed rock masses at the visual angle but also related to the intersection angle between the visual angle and the directions of the principal stresses. Some numerical examples are given to analyze and verify the proposed constitutive model. The results show the proposed constitutive model has high precision to calculate displacement, stress and plastic strain and can be applied in engineering analysis.

Show MeSH
Related in: MedlinePlus