weac.components.weak_layer module¶

Mechanical properties of the weak layer (Winkler foundation).

class weac.components.weak_layer.WeakLayer(*, rho=150, h=20, f=None, collapse_height=0.0, nu=0.25, E=0.0, G=0.0, kn=0.0, kt=0.0, G_Ic=0.56, G_IIc=0.79, sigma_c=6.16, tau_c=5.09, sigma_comp=2.6, E_method='schottner_fc_dh', constitutive_model='PlaneStrain', grain_type=None, grain_size=None, hand_hardness=None)[source]¶

Bases: BaseModel

Weak layer that also behaves as a Winkler foundation.

Parameters:

rho (Annotated[float, Gt(gt=0)])
h (Annotated[float, Gt(gt=0)])
f (float | None)
collapse_height (Annotated[float, Ge(ge=0)])
nu (Annotated[float, Ge(ge=0), Lt(lt=0.5)])
E (Annotated[float, Ge(ge=0)])
G (Annotated[float, Ge(ge=0)])
kn (float)
kt (float)
G_Ic (Annotated[float, Gt(gt=0)])
G_IIc (Annotated[float, Gt(gt=0)])
sigma_c (Annotated[float, Gt(gt=0)])
tau_c (Annotated[float, Gt(gt=0)])
sigma_comp (Annotated[float, Gt(gt=0)])
E_method (Literal['schottner_fc_dh', 'bergfeld', 'scapazzo', 'gerling'])
constitutive_model (Literal['PlaneStrain', 'PlaneStress', 'Uniaxial'])
grain_type (GrainType | None)
grain_size (float | None)
hand_hardness (HandHardness | None)

rho¶

Density of the layer [kg m⁻³].

Type:: float

h¶

Height/Thickness of the layer [mm].

Type:: float

f¶

Resultant force of the layer [N/mm]

Type:: float

nu¶

Poisson’s ratio [-] Defaults to weac.constants.NU).

Type:: float

E¶

Young’s modulus E [MPa]. If omitted it is derived from rho.

Type:: float, optional

G¶

Shear modulus G [MPa]. If omitted it is derived from E and nu.

Type:: float, optional

kn¶

Normal (compression) spring stiffness kₙ [N mm⁻³]. If omitted is computed as E_plane / h where E_plane = E / (1 - nu²).

Type:: float, optional

kt¶

Shear spring stiffness kₜ [N mm⁻³]. If omitted it is G / h.

Type:: float, optional

G_Ic¶

Mode-I fracture toughness GIc [J/m^2]. Default 0.56 J/m^2.

Type:: float

G_IIc¶

Mode-II fracture toughness GIIc [J/m^2]. Default 0.79 J/m^2.

Type:: float

rho: float¶

h: float¶

f: float | None¶

collapse_height: float¶

nu: float¶

E: float¶

G: float¶

kn: float¶

kt: float¶

G_Ic: float¶

G_IIc: float¶

sigma_c: float¶

tau_c: float¶

sigma_comp: float¶

E_method: Literal['schottner_fc_dh', 'bergfeld', 'scapazzo', 'gerling']¶

constitutive_model: Literal['PlaneStrain', 'PlaneStress', 'Uniaxial']¶

grain_type: GrainType | None¶

grain_size: float | None¶

hand_hardness: HandHardness | None¶

model_config = {'extra': 'forbid', 'frozen': True}¶: Configuration for the model, should be a dictionary conforming to [ConfigDict][pydantic.config.ConfigDict].

model_post_init(_ctx)[source]¶: Override this method to perform additional initialization after __init__ and model_construct. This is useful if you want to do some validation that requires the entire model to be initialized.

validate_positive_E_G()[source]¶: Validate that E and G are positive.