### 5.12.1. Drucker-Prager Strength Model

To access local data

    USE matdef
    USE yp_linear
    USE yp_pcwise
    USE yp_stassi

SHRMDZ | Shear Modulus
Piecewise Linear
PRETAB`n` | Tabular pressure values, `n`= 1 to 10
YLDTAB`n` | Tabular yield stress values, `n`= 1 to 10
Linear Hardening
SLOPEZ | Hardening slope
Stassi Hardening
YLDSTC | Yield in uniaxial strain - compressive
YLDSTT | Yield in uniaxial strain - tension
KFACT | Ratio YLDSTC/YLDSTT

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