Abstract:We combined displacement- and velocity- dependent aperture models to
reproduce the transient shear-induced dilatancy of rock fractures in 16
normal stress unloading tests. Our results show that the combined
aperture model can well capture the transient aperture evolution during
stable sliding induced by normal stress unloading. Slip velocity tends
to enhance the modelled aperture increase on smoother fractures at lower
normal stresses and higher slip velocities. The dilation factor and
characteristic slip dist… Show more
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