Construction method of nonlinear unified constitutive model for shear failure of rock structural surface
The invention discloses a construction method of a nonlinear unified constitutive model for shear failure of a rock structural plane, which comprises the following steps: carrying out a shear test on an artificial structural plane sample to obtain a shear stress-shear displacement curve; obtaining t...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a construction method of a nonlinear unified constitutive model for shear failure of a rock structural plane, which comprises the following steps: carrying out a shear test on an artificial structural plane sample to obtain a shear stress-shear displacement curve; obtaining the shear rigidity ks, the peak stress tau p and the residual stress tau r in the peak shear type shear stress-shear displacement curve and the initial shear rigidity ksi, the peak stress tau p and the residual stress tau r in the sliding failure type shear stress-shear displacement curve; and establishing a corresponding function of a shear stress-shear displacement curve, and obtaining a nonlinear unified constitutive model of shear failure of the rock structural surface. According to the method, a corresponding function of a uniform constitutive model of a shear stress-shear displacement curve is established, under the positive infinite limit of x, a variable u is replaced with ultimate strength tau u, and then t |
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