drucker-prager

bulk f

bulk modulus, $K$

cohesion-drucker f

material parameter, $k_{\phi}$

dilation-drucker f

material parameter, $q_{\psi}$. The default is 0.0.

friction-drucker f

material parameter, $q_{\phi}$

poisson f

Poisson’s ratio, $\nu$

shear f

shear modulus, $G$

tension f

tension limit, ${\sigma}^t$. The default is 0.0.

young f

Young’s modulus, $E$

Notes:

• Only one of the two options is required to define the elasticity: bulk modulus $K$ and shear modulus $G$, or Young’s modulus $E$ and Poisson’s ratio $\nu$. When choosing the latter, Young’s modulus $E$ must be assigned in advance of Poisson’s ratio $\nu$.
• The tension cut-off is ${\sigma}^t = min({\sigma}^t, k_{\phi} / q_{\psi})$.