Sci hoek brown flac3d
It should not be allowed to be set by the user. It should have a default value and should not be necessary to specify for simpler applications of the model. The tension table and flag-brittle should not be active at the same time.Īdvanced property.Otherwise, the current set can be considered only for output. The other is called current set, which are automatically initialized as the same values of the constant set,īut can be updated thereafter using tables or FISH functions if parameter evolution/update is involved, One is called constant set, which are the values assigned at the first time and remain constant thereafter Strain hardening/softening behavior can be prescribed for the Hoek-Brown properties, Set dilation as a fraction of the friction angle ( \(\psi_c\) is set to a constant time \(\phi_c\)) flag-dilation is a positive fraction.Specify associated plastic flow ( \(\psi_c\) is set equal to \(\phi_c\)) by setting flag-dilation = -1.Input a dilation angle ( \(\psi_c\) is a constant value) specified by property keyword constant-dilation and flag-dilation = 0.Previously in the Hoek-Brown-PAC model, and repeated here: Major and minor principal stresses, \(\sigma_1\) and \(\sigma_3\), as shown The criterion is based on a nonlinear relation between The Hoek-Brown criterion is used for plastic yielding when the minor principal stress, The formulation and an example exercise are given below. Using the model factor-of-safety command.
The Hoek-Brown model is derived directly from the Mohr-Coulomb model,Īnd, like the Mohr-Coulomb model, can be used to perform factor of safety calculations Modified to include a tensile yield criterion, and also allow the user to specify aĭilation angle as an input parameter and manually control the level of dilation that
The alternative version, described in this section, is Higher confining stress states, but can produce excessive dilation at low confinement or Yielding that accounts for the changing failure condition.
Sci hoek brown flac3d simulator#
The Hoek-Brown-PAC model provides a representation for The methodology of using the TOUGH2-MP/FLAC3D simulator can be applied to predict the long-term behavior of the KRS under various conditions these methods will be useful for the design and performance assessment of alternative concepts such as multi-layer and multi-canister concepts for geological spent fuel repositories.