The Drucker-Prager material model is available for 2D, brick and tetrahedral elements. This model is similar to the elastic/plastic material model described above except that the assumption of a yielding function is different. Basically, this material model assumes that the volumetric strain changes the yielding function, which occurs in granular materials such as concrete and rock. The Drucker-Prager material properties are listed below. In addition it may be necessary to define some Isotropic Material Properties.
Cohesion
This property is required for 2D elements. It is also required for brick and tetrahedral elements if you are defining the data using the Solid mechanics coefficients option. This is used to define the yield function. Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Angle of Friction
This property is required for 2D elements. It is also required for brick and tetrahedral elements if you are defining the data using the Solid mechanics coefficients option. This is used to define the yield function. Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Alpha
This property is only applicable for brick and tetrahedral elements. It is required if you are defining the data using the Model constants option. This is used to define the yield function. Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Beta
This property is only applicable for brick and tetrahedral elements. It is required if you are defining the data using the Model constants option. This is used to define the yield function. Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Tension cutoff coefficient
This property is only applicable for brick and tetrahedral elements. This property will be used to determine the tension cutoff of the yield function if the tension cutoff has been selected to be considered in the analysis Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Residual stiffness factor
This property is only applicable for brick and tetrahedral elements. This property will be used to determine the tension cutoff of the yield function if the tension cutoff has been selected to be considered in the analysis Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
First cap hardening coefficient
This property is only applicable for brick and tetrahedral elements. This property will be used to determine the cap hardening of the yield function if the cap hardening has been selected to be considered in the analysis Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.
Second cap hardening coefficient
This property is only applicable for brick and tetrahedral elements. This property will be used to determine the cap hardening of the yield function if the cap hardening has been selected to be considered in the analysis Refer to theTheoretical Description of the 3D Drucker-Prager Material Model for more details.
Initial cap position
This property is only applicable for brick and tetrahedral elements. This property will be used to determine the cap hardening of the yield function if the cap hardening has been selected to be considered in the analysis Refer to the Theoretical Description of the 3D Drucker-Prager Material Model for more details.