202 lines
7.2 KiB
Python
202 lines
7.2 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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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": "Multimaterial bending beam 5 faces",
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"meshtype": "face",
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"meshelement": "Tria6",
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"constraints": ["fixed", "force"],
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"solvers": ["ccxtools"],
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"material": "multimaterial",
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"equations": ["mechanical"],
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}
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def get_explanation(header=""):
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return (
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header
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+ """
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To run the example from Python console use:
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from femexamples.material_multiple_bendingbeam_fivefaces import setup
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setup()
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See forum topic post:
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...
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"""
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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 objects
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# name is important because the other method in this module use obj name
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# parts
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face_obj1 = doc.addObject("Part::Plane", "Face1")
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face_obj1.Width = 10
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face_obj1.Length = 20
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face_obj2 = doc.addObject("Part::Plane", "Face2")
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face_obj2.Width = 10
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face_obj2.Length = 20
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face_obj2.Placement.Base = (20, 0, 0)
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face_obj3 = doc.addObject("Part::Plane", "Face3")
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face_obj3.Width = 10
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face_obj3.Length = 20
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face_obj3.Placement.Base = (40, 0, 0)
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face_obj4 = doc.addObject("Part::Plane", "Face4")
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face_obj4.Width = 10
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face_obj4.Length = 20
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face_obj4.Placement.Base = (60, 0, 0)
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face_obj5 = doc.addObject("Part::Plane", "Face5")
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face_obj5.Width = 10
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face_obj5.Length = 20
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face_obj5.Placement.Base = (80, 0, 0)
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doc.recompute()
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# make a Shell out of the faces, to be able to remesh with GUI
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geom_obj = doc.addObject("Part::MultiFuse", "Fusion")
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geom_obj.Shapes = [face_obj1, face_obj2, face_obj3, face_obj4, face_obj5]
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if FreeCAD.GuiUp:
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face_obj1.ViewObject.hide()
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face_obj2.ViewObject.hide()
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face_obj3.ViewObject.hide()
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face_obj4.ViewObject.hide()
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face_obj5.ViewObject.hide()
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doc.recompute()
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if FreeCAD.GuiUp:
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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 == "ccxtools":
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solver_obj = ObjectsFem.makeSolverCalculiXCcxTools(doc, "CalculiXCcxTools")
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solver_obj.WorkingDir = ""
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else:
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FreeCAD.Console.PrintWarning(
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"Unknown or unsupported solver type: {}. "
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"No solver object was created.\n".format(solvertype)
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)
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if 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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# shell thickness
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thickness_obj = ObjectsFem.makeElementGeometry2D(doc, 10, "ShellThickness")
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analysis.addObject(thickness_obj)
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# materials
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material_obj1 = ObjectsFem.makeMaterialSolid(doc, "FemMaterial1")
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material_obj1.References = [(doc.Face3, "Face1")]
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mat = material_obj1.Material
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mat["Name"] = "Concrete-Generic"
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mat["YoungsModulus"] = "32000 MPa"
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mat["PoissonRatio"] = "0.17"
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material_obj1.Material = mat
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analysis.addObject(material_obj1)
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material_obj2 = ObjectsFem.makeMaterialSolid(doc, "FemMaterial2")
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material_obj2.References = [(doc.Face2, "Face1"), (doc.Face4, "Face1")]
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mat = material_obj2.Material
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mat["Name"] = "PLA"
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mat["YoungsModulus"] = "3640 MPa"
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mat["PoissonRatio"] = "0.36"
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material_obj2.Material = mat
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analysis.addObject(material_obj2)
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material_obj3 = ObjectsFem.makeMaterialSolid(doc, "FemMaterial3")
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material_obj3.References = []
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mat = material_obj3.Material
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mat["Name"] = "Steel-Generic"
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mat["YoungsModulus"] = "200000 MPa"
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mat["PoissonRatio"] = "0.30"
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material_obj3.Material = mat
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analysis.addObject(material_obj3)
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# constraint fixed
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con_fixed = ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
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con_fixed.References = [(doc.Face1, "Edge1"), (doc.Face5, "Edge3")]
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analysis.addObject(con_fixed)
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# constraint force
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con_force = ObjectsFem.makeConstraintForce(doc, "ConstraintForce")
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con_force.References = [
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(doc.Face1, "Edge4"),
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(doc.Face2, "Edge4"),
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(doc.Face3, "Edge4"),
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(doc.Face4, "Edge4"),
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(doc.Face5, "Edge4"),
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]
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con_force.Force = "10000.00 N"
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con_force.Direction = (doc.Face1, ["Edge1"])
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con_force.Reversed = True
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analysis.addObject(con_force)
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# mesh
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from .meshes.mesh_multibodybeam_tria6 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.Shape = geom_obj
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femmesh_obj.SecondOrderLinear = False
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doc.recompute()
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return doc
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