168 lines
6.1 KiB
Python
168 lines
6.1 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2019 Bernd Hahnebach <bernd@bimstatik.org> *
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# * Copyright (c) 2020 Sudhanshu Dubey <sudhanshu.thethunder@gmail.com *
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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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# to run the example use:
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"""
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from femexamples.boxanalysis_static import setup
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setup()
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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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mesh_name = "Mesh" # needs to be Mesh to work with unit tests
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def init_doc(doc=None):
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if doc is None:
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doc = FreeCAD.newDocument()
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return doc
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def get_information():
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info = {"name": "Box Analysis Static",
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"meshtype": "solid",
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"meshelement": "Tet10",
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"constraints": ["fixed", "force", "pressure"],
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"solvers": ["ccx", "z88", "elmer"],
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"material": "solid",
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"equation": "mechanical"
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}
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return info
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def setup_base(doc=None, solvertype="ccxtools"):
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# setup box base model
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if doc is None:
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doc = init_doc()
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# geometry object
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geom_obj = doc.addObject("Part::Box", "Box")
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geom_obj.Height = geom_obj.Width = geom_obj.Length = 10
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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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# material
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material_object = analysis.addObject(
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ObjectsFem.makeMaterialSolid(doc, "MechanicalMaterial")
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)[0]
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mat = material_object.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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mat["Density"] = "7900 kg/m^3"
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if solvertype == "elmer":
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# set ThermalExpansionCoefficient
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# FIXME elmer elasticity needs the dictionary key "ThermalExpansionCoefficient"
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mat["ThermalExpansionCoefficient"] = "0.012 mm/m/K"
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material_object.Material = mat
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# mesh
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from .meshes.mesh_boxanalysis_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, mesh_name))[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.CharacteristicLengthMin = "8.0 mm"
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doc.recompute()
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return doc
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def setup(doc=None, solvertype="ccxtools"):
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# setup box static, add a fixed, force and a pressure constraint
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doc = setup_base(doc, solvertype)
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geom_obj = doc.Box
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analysis = doc.Analysis
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# solver
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if solvertype == "calculix":
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solver_object = analysis.addObject(
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ObjectsFem.makeSolverCalculix(doc, "SolverCalculiX")
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)[0]
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elif solvertype == "ccxtools":
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solver_object = analysis.addObject(
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ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
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)[0]
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solver_object.WorkingDir = u""
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elif solvertype == "elmer":
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solver_object = analysis.addObject(
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ObjectsFem.makeSolverElmer(doc, "SolverElmer")
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)[0]
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ObjectsFem.makeEquationElasticity(doc, solver_object)
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elif solvertype == "z88":
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analysis.addObject(ObjectsFem.makeSolverZ88(doc, "SolverZ88"))
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if solvertype == "calculix" or solvertype == "ccxtools":
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solver_object.SplitInputWriter = False
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solver_object.AnalysisType = "static"
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solver_object.GeometricalNonlinearity = "linear"
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solver_object.ThermoMechSteadyState = False
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solver_object.MatrixSolverType = "default"
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solver_object.IterationsControlParameterTimeUse = False
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# fixed_constraint
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fixed_constraint = analysis.addObject(
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ObjectsFem.makeConstraintFixed(doc, name="FemConstraintFixed")
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)[0]
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fixed_constraint.References = [(geom_obj, "Face1")]
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# force_constraint
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force_constraint = analysis.addObject(
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ObjectsFem.makeConstraintForce(doc, name="FemConstraintForce")
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)[0]
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force_constraint.References = [(geom_obj, "Face6")]
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force_constraint.Force = 40000.0
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force_constraint.Direction = (geom_obj, ["Edge5"])
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force_constraint.Reversed = True
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# pressure_constraint
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pressure_constraint = analysis.addObject(
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ObjectsFem.makeConstraintPressure(doc, name="FemConstraintPressure")
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)[0]
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pressure_constraint.References = [(geom_obj, "Face2")]
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pressure_constraint.Pressure = 1000.0
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pressure_constraint.Reversed = False
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doc.recompute()
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return doc
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