Geomechanics Module
New Functionality in Version 6.4
Phase-Field Damage
A new multiphysics interface has been added, Phase-Field Damage, Explicit Dynamics. In terms of functionality, the new interface is equivalent to the Phase-Field Damage multiphysics interface, but the new interface couples the (also new) Solid Mechanics, Explicit Dynamics interface to the Phase Field in Solids interface. This new functionality is showcased in the model Phase-Field Modeling of Dynamic Crack Branching.
The Phase-Field Damage node has been extended with new options for modeling of quasibrittle fractures.
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The Rankine criterion has been added as a crack driving force.
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A new rational damage evolution function has been added.
The linear, exponential, and Cornelissen softening laws, common for modeling concrete, are available as rational degradation functions for the phase-field regularized cohesive zone model (PFCZM).
Improved Time Discretization
The Euler steps used in the discretized equations to compute creep, viscoplasticity, polymer viscoplasticity, and adiabatic heating have been revamped.
The improvements enable faster evaluation of variables and help resolve issues with the initialization of state variables when continuing the solution in subsequent study steps.
Elastoplastic Soil Models
All of the material models available in the Elastoplastic Soil Material node have been revamped. The user interface is new, and the implementation is more robust.
In the Cap and Cutoff subnode, a Linear option has been added to the Hardening model setting and a Cam-clay option has been added to the Cap model setting.
A new option, None, has been added to the Load Reversal Points section of the Small Strain Overlay and Hardening Soil Small Strain models.