182 lines
6.7 KiB
Python
182 lines
6.7 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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import FreeCAD
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from FreeCAD import Vector as vec
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import Part
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from Part import makeLine as ln
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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": "RC Wall 2D",
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"meshtype": "face",
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"meshelement": "Tria6",
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"constraints": ["fixed", "force", "displacement"],
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"solvers": ["calculix"],
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"material": "reinforced",
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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.rc_wall_2d 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=33106&start=80#p296469
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example from Harry's epic topic: Concrete branch ready for testing
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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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v1 = vec(0, -2000, 0)
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v2 = vec(500, -2000, 0)
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v3 = vec(500, 0, 0)
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v4 = vec(3500, 0, 0)
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v5 = vec(3500, -2000, 0)
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v6 = vec(4000, -2000, 0)
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v7 = vec(4000, 2000, 0)
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v8 = vec(0, 2000, 0)
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l1 = ln(v1, v2)
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l2 = ln(v2, v3)
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l3 = ln(v3, v4)
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l4 = ln(v4, v5)
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l5 = ln(v5, v6)
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l6 = ln(v6, v7)
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l7 = ln(v7, v8)
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l8 = ln(v8, v1)
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geom_obj = doc.addObject("Part::Feature", "FIB_Wall")
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geom_obj.Shape = Part.Face(Part.Wire([l1, l2, l3, l4, l5, l6, l7, l8]))
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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_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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# shell thickness
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thickness_obj = ObjectsFem.makeElementGeometry2D(doc, 150.0, "ShellThickness")
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analysis.addObject(thickness_obj)
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# material
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matrixprop = {}
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matrixprop["Name"] = "Concrete-EN-C35/45"
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matrixprop["YoungsModulus"] = "32000 MPa"
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matrixprop["PoissonRatio"] = "0.17"
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matrixprop["CompressiveStrength"] = "15.75 MPa"
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# make some hint on the possible angle units in material system
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matrixprop["AngleOfFriction"] = "30 deg"
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matrixprop["Density"] = "2500 kg/m^3"
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reinfoprop = {}
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reinfoprop["Name"] = "Reinforcement-FIB-B500"
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reinfoprop["YieldStrength"] = "315 MPa"
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# not an official FreeCAD material property
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reinfoprop["ReinforcementRatio"] = "0.0"
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material_reinforced = ObjectsFem.makeMaterialReinforced(doc, "MaterialReinforced")
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material_reinforced.Material = matrixprop
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material_reinforced.Reinforcement = reinfoprop
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analysis.addObject(material_reinforced)
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# constraint fixed
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con_fixed = ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
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con_fixed.References = [(geom_obj, "Edge1"), (geom_obj, "Edge5")]
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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 = [(geom_obj, "Edge7")]
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con_force.Force = 1000000.0
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con_force.Direction = (geom_obj, ["Edge8"])
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con_force.Reversed = False
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analysis.addObject(con_force)
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# constraint displacement
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con_disp = ObjectsFem.makeConstraintDisplacement(doc, "ConstraintDisplacmentPrescribed")
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con_disp.References = [(geom_obj, "Face1")]
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con_disp.zFix = True
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analysis.addObject(con_disp)
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# mesh
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from .meshes.mesh_rc_wall_2d_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.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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