_CommandFemMaterialMechanicalNonlinear.py

# ***************************************************************************
# *                                                                         *
# *   Copyright (c) 2016 - Bernd Hahnebach <bernd@bimstatik.org>            *
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__title__ = "Command nonlinear mechanical material"
__author__ = "Bernd Hahnebach"
__url__ = "http://www.freecadweb.org"

## @package CommandFemMaterialMechanicalNonLinear
#  \ingroup FEM

import FreeCAD
from FemCommands import FemCommands
import FreeCADGui
import FemGui
from PySide import QtCore


class _CommandFemMaterialMechanicalNonlinear(FemCommands):
    "The FEM_MaterialMechanicalNonlinear command definition"
    def __init__(self):
        super(_CommandFemMaterialMechanicalNonlinear, self).__init__()
        self.resources = {'Pixmap': 'fem-material-nonlinear',
                          'MenuText': QtCore.QT_TRANSLATE_NOOP("FEM_MaterialMechanicalNonlinear", "Nonlinear mechanical material"),
                          'Accel': "C, W",
                          'ToolTip': QtCore.QT_TRANSLATE_NOOP("FEM_MaterialMechanicalNonlinear", "Creates a nonlinear mechanical material")}
        self.is_active = 'with_material'

    def Activated(self):
        sel = FreeCADGui.Selection.getSelection()
        if len(sel) == 1 and sel[0].isDerivedFrom("App::MaterialObjectPython"):
            lin_mat_obj = sel[0]
            # check if an nonlinear material exists which is based on the selected material already
            allow_nonlinear_material = True
            for o in FreeCAD.ActiveDocument.Objects:
                if hasattr(o, "Proxy") and o.Proxy is not None and o.Proxy.Type == "FemMaterialMechanicalNonlinear" and o.LinearBaseMaterial == lin_mat_obj:
                    FreeCAD.Console.PrintError(o.Name + ' is based on the selected material: ' + lin_mat_obj.Name + '. Only one nonlinear object for each material allowed.\n')
                    allow_nonlinear_material = False
                    break
            if allow_nonlinear_material:
                string_lin_mat_obj = "App.ActiveDocument.getObject('" + lin_mat_obj.Name + "')"
                command_to_run = "FemGui.getActiveAnalysis().Member = FemGui.getActiveAnalysis().Member + [ObjectsFem.makeMaterialMechanicalNonlinear(" + string_lin_mat_obj + ")]"
                FreeCAD.ActiveDocument.openTransaction("Create FemMaterialMechanicalNonlinear")
                FreeCADGui.addModule("ObjectsFem")
                FreeCADGui.doCommand(command_to_run)
            # set the material nonlinear property of the solver to nonlinear if only one solver is available and if this solver is a CalculiX solver
            solver_object = None
            for m in FemGui.getActiveAnalysis().Member:
                if m.isDerivedFrom('Fem::FemSolverObjectPython'):
                    if not solver_object:
                        solver_object = m
                    else:
                        # we do not change the material nonlinear attribut if we have more than one solver
                        solver_object = None
                        break
            if solver_object and solver_object.SolverType == 'FemSolverCalculix':
                solver_object.MaterialNonlinearity = "nonlinear"

FreeCADGui.addCommand('FEM_MaterialMechanicalNonlinear', _CommandFemMaterialMechanicalNonlinear())