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# * Copyright (c) 2016 Bernd Hahnebach <bernd@bimstatik.org> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
__title__ = "FreeCAD FEM material mechanical nonlinear document object"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"
## @package material_mechanicalnonlinear
# \ingroup FEM
# \brief nonlinear mechanical material object
from . import base_fempythonobject
class MaterialMechanicalNonlinear(base_fempythonobject.BaseFemPythonObject):
"""
The MaterialMechanicalNonlinear object
"""
Type = "Fem::MaterialMechanicalNonlinear"
def __init__(self, obj):
super().__init__(obj)
self.add_properties(obj)
obj.addExtension("App::SuppressibleExtensionPython")
def onDocumentRestored(self, obj):
# YieldPoints was (until 0.19) stored as 3 separate variables. Consolidate them if present.
yield_points = []
if hasattr(obj, "YieldPoint1"):
if obj.YieldPoint1:
yield_points.append(obj.YieldPoint1)
obj.removeProperty("YieldPoint1")
if hasattr(obj, "YieldPoint2"):
if obj.YieldPoint2:
yield_points.append(obj.YieldPoint2)
obj.removeProperty("YieldPoint2")
if hasattr(obj, "YieldPoint3"):
if obj.YieldPoint3:
yield_points.append(obj.YieldPoint3)
obj.removeProperty("YieldPoint3")
self.add_properties(obj)
if yield_points:
obj.YieldPoints = yield_points
if not obj.hasExtension("App::SuppressibleExtensionPython"):
obj.addExtension("App::SuppressibleExtensionPython")
# TODO: If in the future more nonlinear options are added, update choices here.
def add_properties(self, obj):
# this method is called from onDocumentRestored
# thus only add and or set a attribute
# if the attribute does not exist
if not hasattr(obj, "LinearBaseMaterial"):
obj.addProperty(
"App::PropertyLink",
"LinearBaseMaterial",
"Base",
"Set the linear material the nonlinear builds upon.",
)
obj.setPropertyStatus("LinearBaseMaterial", "LockDynamic")
if not hasattr(obj, "MaterialModelNonlinearity"):
choices_nonlinear_material_models = ["isotropic hardening", "kinematic hardening"]
obj.addProperty(
"App::PropertyEnumeration",
"MaterialModelNonlinearity",
"Fem",
"Set the type on nonlinear material model",
)
obj.setPropertyStatus("MaterialModelNonlinearity", "LockDynamic")
obj.MaterialModelNonlinearity = choices_nonlinear_material_models
obj.MaterialModelNonlinearity = choices_nonlinear_material_models[0]
if (
hasattr(obj, "MaterialModelNonlinearity")
and obj.MaterialModelNonlinearity == "simple hardening"
):
updated_choices_nonlinear_material_models = [
"isotropic hardening",
"kinematic hardening",
]
obj.MaterialModelNonlinearity = updated_choices_nonlinear_material_models
obj.MaterialModelNonlinearity = updated_choices_nonlinear_material_models[0]
if not hasattr(obj, "YieldPoints"):
obj.addProperty(
"App::PropertyStringList",
"YieldPoints",
"Fem",
"Set stress and strain for yield points as a list of strings, "
'each point "stress, plastic strain"',
)
obj.setPropertyStatus("YieldPoints", "LockDynamic")
obj.YieldPoints = []
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