195 lines
7.1 KiB
Python
195 lines
7.1 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2020 Sudhanshu Dubey <sudhanshu.thethunder@gmail.com> *
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# * Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org> *
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# * *
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# * This file is part of the FreeCAD CAx development system. *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * This program is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with this program; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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import FreeCAD
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from FreeCAD import Rotation
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from FreeCAD import Vector
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from CompoundTools import CompoundFilter
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import Fem
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import ObjectsFem
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from . import manager
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from .manager import get_meshname
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from .manager import init_doc
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def get_information():
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return {
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"name": "Constraint Transform Beam Hinged",
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"meshtype": "solid",
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"meshelement": "Tet10",
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"constraints": ["pressure", "displacement", "transform"],
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"solvers": ["calculix", "ccxtools"],
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"material": "solid",
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"equation": "mechanical"
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}
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def get_explanation(header=""):
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return header + """
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To run the example from Python console use:
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from femexamples.constraint_transform_beam_hinged import setup
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setup()
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See forum topic post:
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https://forum.freecadweb.org/viewtopic.php?f=18&t=20238#p157643
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Constraint transform on a beam
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"""
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def setup(doc=None, solvertype="ccxtools"):
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# init FreeCAD document
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if doc is None:
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doc = init_doc()
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# explanation object
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# just keep the following line and change text string in get_explanation method
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manager.add_explanation_obj(doc, get_explanation(manager.get_header(get_information())))
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# geometric object
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# name is important because the other method in this module use obj name
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cube = doc.addObject("Part::Box", "Cube")
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cube.Height = "20 mm"
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cube.Length = "100 mm"
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cylinder = doc.addObject("Part::Cylinder", "Cylinder")
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cylinder.Height = "20 mm"
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cylinder.Radius = "6 mm"
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cylinder.Placement = FreeCAD.Placement(
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Vector(10, 12, 10), Rotation(0, 0, 90), Vector(0, 0, 0),
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)
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cut = doc.addObject("Part::Cut", "Cut")
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cut.Base = cube
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cut.Tool = cylinder
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# mirroring
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mirror = doc.addObject("Part::Mirroring", "Mirror")
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mirror.Source = cut
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mirror.Normal = (1, 0, 0)
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mirror.Base = (100, 100, 20)
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# fusing
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fusion = doc.addObject("Part::Fuse", "Fusion")
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fusion.Base = cut
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fusion.Tool = mirror
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fusion.Refine = True
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# compound filter
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geom_obj = CompoundFilter.makeCompoundFilter(name='CompoundFilter')
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geom_obj.Base = fusion
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geom_obj.FilterType = 'window-volume'
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doc.recompute()
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if FreeCAD.GuiUp:
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geom_obj.Base.ViewObject.hide()
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geom_obj.ViewObject.Document.activeView().viewAxonometric()
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geom_obj.ViewObject.Document.activeView().fitAll()
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# analysis
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analysis = ObjectsFem.makeAnalysis(doc, "Analysis")
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# solver
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if solvertype == "calculix":
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solver_obj = ObjectsFem.makeSolverCalculix(doc, "SolverCalculiX")
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elif solvertype == "ccxtools":
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solver_obj = ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
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solver_obj.WorkingDir = u""
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else:
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FreeCAD.Console.PrintWarning(
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"Not known or not supported solver type: {}. "
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"No solver object was created.\n".format(solvertype)
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)
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if solvertype == "calculix" or solvertype == "ccxtools":
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solver_obj.SplitInputWriter = False
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solver_obj.AnalysisType = "static"
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solver_obj.GeometricalNonlinearity = "linear"
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solver_obj.ThermoMechSteadyState = False
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solver_obj.MatrixSolverType = "default"
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solver_obj.IterationsControlParameterTimeUse = False
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analysis.addObject(solver_obj)
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# material
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material_obj = ObjectsFem.makeMaterialSolid(doc, "FemMaterial")
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mat = material_obj.Material
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mat["Name"] = "CalculiX-Steel"
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mat["YoungsModulus"] = "210000 MPa"
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mat["PoissonRatio"] = "0.30"
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material_obj.Material = mat
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analysis.addObject(material_obj)
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# constraint pressure
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con_pressure = ObjectsFem.makeConstraintPressure(doc, name="FemConstraintPressure")
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con_pressure.References = [(geom_obj, "Face8")]
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con_pressure.Pressure = 10.0
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con_pressure.Reversed = False
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analysis.addObject(con_pressure)
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# constraint displacement
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con_disp = ObjectsFem.makeConstraintDisplacement(doc, name="FemConstraintDisplacment")
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con_disp.References = [(geom_obj, "Face4"), (geom_obj, "Face5")]
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con_disp.xFree = False
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con_disp.xFix = True
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analysis.addObject(con_disp)
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# constraints transform
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con_transform1 = ObjectsFem.makeConstraintTransform(doc, name="FemConstraintTransform1")
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con_transform1.References = [(geom_obj, "Face4")]
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con_transform1.TransformType = "Cylindrical"
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con_transform1.X_rot = 0.0
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con_transform1.Y_rot = 0.0
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con_transform1.Z_rot = 0.0
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analysis.addObject(con_transform1)
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con_transform2 = ObjectsFem.makeConstraintTransform(doc, name="FemConstraintTransform2")
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con_transform2.References = [(geom_obj, "Face5")]
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con_transform2.TransformType = "Cylindrical"
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con_transform2.X_rot = 0.0
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con_transform2.Y_rot = 0.0
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con_transform2.Z_rot = 0.0
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analysis.addObject(con_transform2)
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# mesh
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from .meshes.mesh_transform_beam_hinged_tetra10 import create_nodes, create_elements
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fem_mesh = Fem.FemMesh()
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control = create_nodes(fem_mesh)
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if not control:
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FreeCAD.Console.PrintError("Error on creating nodes.\n")
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control = create_elements(fem_mesh)
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if not control:
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FreeCAD.Console.PrintError("Error on creating elements.\n")
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femmesh_obj = analysis.addObject(ObjectsFem.makeMeshGmsh(doc, get_meshname()))[0]
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femmesh_obj.FemMesh = fem_mesh
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femmesh_obj.Part = geom_obj
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femmesh_obj.SecondOrderLinear = False
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femmesh_obj.CharacteristicLengthMax = '7 mm'
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doc.recompute()
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return doc
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