PlateFiberSection

PlateFiberSection(user_name: str = 'Unnamed', *, material: Union[int, str, Material])

Bases: Section

Nonlinear shell section backed by a plane-stress nD material.

This section type represents a shell section whose response is integrated from a single nD material. It is used to model nonlinear behavior in plate and shell structures where the material response is defined in terms of plane-stress invariants.

Tcl form

section PlateFiber <tag> <matTag>

Note

The material must be an nDMaterial compatible with plane-stress behavior.
This section is typically used when the nonlinear material behavior is the primary focus of the shell model.

Tip

For concrete shell modeling, use this with a nonlinear concrete material (like Concrete01 wrapped as an nD material if supported, or a dedicated nD concrete model).

Example

from femora.core.model import Model
import femora.components.section.shell  # noqa: F401

model = Model()
mat = model.material.nd.elastic_isotropic(user_name="ConcreteND", E=3600.0, nu=0.2)
sec = model.section.shell.plate_fiber(
    user_name="ShellNonlinear",
    material=mat,
)
print(sec.tag)

Create a PlateFiberSection with a validated nD material.

Parameters:

Name	Type	Description	Default
`user_name`	`str`	Unique identifier for the section.	`'Unnamed'`
`material`	`Union[int, str, Material]`	nD material reference (object, tag, or name).	required

Raises:

Type	Description
`ValueError`	If the material cannot be resolved, or if it is not recognized as an nDMaterial.