CDPM2
Last updated
Last updated
CDPM2 Model for Concrete Material
The isotropic damage is implemented.
The anisotropic damage is implemented.
The default CDPM2
uses isotropic damage, which is equivalent to CDPM2ISO
.
The token CDPM2ANISO
uses anisotropic damage.
If damage is activated, both tension and compression use the exponential damage model, the degradation is controlled by parameters [14] and [15]. The characteristic length can be accounted for by modifying them.
This model supports the following additional history variables to be recorded.
DT
tensile damage
DC
compressive damage
The anisotropic damage uses the following expression,
Both damage types have physical implications. Depending on the damage type, the model parameters may be adjusted differently.
For detailed explanations of parameters, please refer to .
Details of implementation can be seen in the corresponding section in .
The isotropic damage uses the following expression for the final stress ,
In the above expressions, is the effective stress (undamaged), and are compressive and tensile part of the effective stress. They are computed via eigen decomposition of the effective stress tensor. and are the compressive and tensile damage variables, respectively.
The reference strains and affect the degradation of strength.
The following are two examples, using different values of and , while all other parameters are the default values.