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- W2350099352 abstract "FISH functions are written and embedded in FLAC to calculate axial, lateral and volumetric strains as well as Poisson's ratio for rock specimen in plane strain compression. Influences of shear dilatancy on shear band (SB) patterns and entire deformational characteristics of the specimen are investigated numerically. In elastic stage, the adopted constitutive relation of rock is linear elastic; in strain-softening stage, a composite Mohr-Coulomb criterion with tension cut-off is used and the post-peak constitutive relation is linear. It is shown that increase of dilation angle leads to 1) transition of failure mode from a single to conjugate SBs; 2) increase of SB's inclination closer to Arthur's theory; 3) increase of SB's thickness, as qualitatively agrees with the formula considering shear dilatancy based on gradient-dependent plasticity; 4) increase of peak strength and corresponding axial, lateral and volumetric strains;5) no steeper axial stress-axial strain curve and axial stress-lateral strain curve beyond the peak since SB's number and thickness increase with dilation angle based on analytical solutions applicable to uniaxial compression of rock specimen;6) higher lateral deformation and Poisson's ratio, and even negative volumetric strain; and 7) more apparent precursor to instability failure of rock specimen." @default.
- W2350099352 created "2016-06-24" @default.
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- W2350099352 date "2005-01-01" @default.
- W2350099352 modified "2023-09-25" @default.
- W2350099352 title "Effects of Shear Dilatancy on Entire Deformational Characteristics of Rock Specimen" @default.
- W2350099352 hasPublicationYear "2005" @default.
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