# DruckerPrager

Define a Drucker-Prager material.

name : str

String naming the material.

color : Color

Material appearance. color= Color(r=79,g=180,b=63)

drainage : str

Material drainage type. drainage = 'drained_undrained', 'always_drained', 'non_porous'

cavitation_cutoff : str

cavitation_cutoff = 'no' or 'yes'

pcav : float

Cavitation pressure in kPa

E : float

Young's Modulus, in MPa.

nu : float

Poisson's ratio.

k : float

Model parameter,in kPa

M : float

Model fitting parameter

flow_rule : str

flow_rule = 'associated' or 'nonassociated'

N : float

Model cap parameter

dilation_cap : str

dilation_cap = 'no', 'volumetric', 'deviatoric'

ev_cr : float

Critical volumetric strain

es_cr : float

Critical shear strain

gamma_dry : float

Dry unit weight in kN/m^3

gamma_sat : float

Saturated unit weight in kN/m^3

tension_cutoff : str

Apply tension cutoff. tension_cutoff = 'yes' or 'no'

sigma_t : str

Tensile cutoff stress, in kPa.

K0 : float

Earth pressure coefficient at rest.

hydraulic_conductivity_option : str

hydraulic_conductivity_option = 'isotropic' or 'anisotropic'

K : float

Hydraulic conductivity, in m/day.

Kx : float

Hydraulic conductivity in x, in m/day.

Ky : float

Hydraulic conductivity in y, in m/day.

Kz : float

Hydraulic conductivity in z, in m/day.

hydraulic_model : str

hydraulic_model = 'basic' or 'van_genuchten'

e : float

Void ratio.

alpha : float

Model parameter related to the air entry pressure.

n : float

Model parameter related to the rate at which water is extracted from the soil once the air entry pressure has been exceeded.

Sr : float

Residual degree of saturation (may be slightly greater than 0).

Ss : float

Fraction of water filled pores at full saturation (may be slightly less than 1).

reducible_strength : str

Apply reducible strength. reducible_strength = 'yes' or 'no'

i = 5
model2d.add_rectangle([i,0],[i+1,2])
Face = model2d.select(p0=[i+0.5,1],types='face')
DruckerPragerMaterial = prj.DruckerPrager(name='DruckerPragerMaterial',
color=Color(r=139,g=131,b=166),
drainage='drained_undrained',
cavitation_cutoff=False,
pcav=100,
E=30,
nu=0.25,
k=5,
M=0.7,
flow_rule='non_associated',
N=5,
dilation_cap='deviatoric',
ev_cr=0.01,
es_cr=0.01,
tension_cutoff='yes',
sigma_t=0,
gamma_dry=18,
gamma_sat=20,
K0=0.58,
hydraulic_conductivity_option='anisotropic',
K=0.001,
Kx=0.001,
Ky=0.001,
Kz=0.001,
hydraulic_model='van_genuchten',
e=1,
alpha=2,
n=2,
Sr=0,
Ss=1,
reducible_strength='yes',
)
model2d.set_solid(shapes=Face,material=DruckerPragerMaterial)