174 lines
6.3 KiB
Python
174 lines
6.3 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2020 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.constraint_tie import setup
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setup()
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"""
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# constraint tie, bond two surfaces together (solid mesh only)
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# https://forum.freecadweb.org/viewtopic.php?f=18&t=42783
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import FreeCAD
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from FreeCAD import Vector
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import Fem
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import ObjectsFem
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import Part
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from BOPTools import SplitFeatures
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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": "Constraint Tie",
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"meshtype": "solid",
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"meshelement": "Tet10",
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"constraints": ["fixed", "force", "tie"],
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"solvers": ["ccx"],
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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(doc=None, solvertype="ccxtools"):
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# setup model
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if doc is None:
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doc = init_doc()
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# geometry objects
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# cones cut
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cone_outer_sh = Part.makeCone(1100, 1235, 1005, Vector(0, 0, 0), Vector(0, 0, 1), 359)
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cone_inner_sh = Part.makeCone(1050, 1185, 1005, Vector(0, 0, 0), Vector(0, 0, 1), 359)
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cone_cut_sh = cone_outer_sh.cut(cone_inner_sh)
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cone_cut_obj = doc.addObject("Part::Feature", "Cone_Cut")
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cone_cut_obj.Shape = cone_cut_sh
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# lines
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line_fix_sh = Part.Edge(Part.LineSegment(Vector(0, -1235, 1005), Vector(0, -1185, 1005)))
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line_fix_obj = doc.addObject("Part::Feature", "Line_Fix")
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line_fix_obj.Shape = line_fix_sh
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line_force_sh = Part.Edge(Part.LineSegment(Vector(0, 1185, 1005), Vector(0, 1235, 1005)))
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line_force_obj = doc.addObject("Part::Feature", "Line_Force")
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line_force_obj.Shape = line_force_sh
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geom_obj = SplitFeatures.makeBooleanFragments(name='BooleanFragments')
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geom_obj.Objects = [cone_cut_obj, line_fix_obj, line_force_obj]
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if FreeCAD.GuiUp:
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cone_cut_obj.ViewObject.hide()
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line_fix_obj.ViewObject.hide()
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line_force_obj.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 == "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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if solvertype == "calculix" or solvertype == "ccxtools":
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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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solver_object.SplitInputWriter = False
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# material
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material_obj = analysis.addObject(
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ObjectsFem.makeMaterialSolid(doc, "MechanicalMaterial")
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)[0]
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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 fixed
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con_fixed = analysis.addObject(
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ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
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)[0]
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con_fixed.References = [(geom_obj, "Edge1")]
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# constraint force
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con_force = doc.Analysis.addObject(
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ObjectsFem.makeConstraintForce(doc, name="ConstraintForce")
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)[0]
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con_force.References = [(geom_obj, "Edge2")]
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con_force.Force = 10000.0 # 10000 N = 10 kN
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con_force.Direction = (geom_obj, ["Edge2"])
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con_force.Reversed = False
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# constraint tie
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con_tie = doc.Analysis.addObject(
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ObjectsFem.makeConstraintTie(doc, name="ConstraintTie")
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)[0]
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con_tie.References = [
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(geom_obj, "Face5"),
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(geom_obj, "Face7"),
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]
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con_tie.Tolerance = 25.0
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# mesh
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from .meshes.mesh_constraint_tie_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(
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ObjectsFem.makeMeshGmsh(doc, mesh_name)
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)[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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doc.recompute()
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return doc
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