11.8.2. Drucker-Prager Strength Stassi

Figure 11.2: Drucker-Prager Strength Stassi

The Stassi yield condition takes the form:

where

J_2Y is the second invariant of the deviatoric stress yield

Y₀ is the yield strength in simple tension

k is the ratio between the yield strengths in compression and tension

p is the pressure

Note: This property can only be applied to solid bodies.

Table 11.5: Input Data

Name	Symbol	Units	Notes
Yield Stress Uniaxial Tension	Y₀	Stress	Measure under uniaxial stress conditions
Yield Stress Uniaxial Compression		Stress	Measure under uniaxial stress conditions

Custom results variables available for this model:

Name	Description	Solids	Shells	Beams
EFF_PL_STN	Effective Plastic Strain	Yes	No	No
Pressure	Pressure	Yes	No	No