kindred/create
1
1
Fork 0
Code Issues 53 Pull Requests Actions Packages Projects 9 Releases 2 Wiki Activity

FEM: thermomech bimetall, add it to the examples

Browse Source
This commit is contained in:
Bernd Hahnebach
2020-02-06 09:00:41 +01:00
parent c21a015404
commit 74ba3e7d26
4 changed files with 4813 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/Mod/Fem/CMakeLists.txt
View File

@@ -43,6 +43,7 @@ SET(FemExamples_SRCS
femexamples/material_multiple_twoboxes.py
femexamples/material_nl_platewithhole.py
femexamples/rc_wall_2d.py
femexamples/thermomech_bimetall.py
femexamples/thermomech_flow1d.py
femexamples/thermomech_spine.py
)
@@ -56,6 +57,7 @@ SET(FemExampleMeshes_SRCS
femexamples/meshes/mesh_contact_tube_tube_tria3.py
femexamples/meshes/mesh_rc_wall_2d_tria6.py
femexamples/meshes/mesh_platewithhole_tetra10.py
femexamples/meshes/mesh_thermomech_bimetall_tetra10.py
femexamples/meshes/mesh_thermomech_flow1d_seg3.py
femexamples/meshes/mesh_thermomech_spine_tetra10.py
)

17
src/Mod/Fem/femexamples/manager.py
View File

@@ -38,6 +38,7 @@ doc = run_constraint_contact_solid_solid()
doc = run_material_nl_platewithhole()
doc = run_material_multiple_twoboxes()
doc = run_rcwall2d()
doc = run_thermomech_bimetall()
doc = run_thermomech_flow1d()
doc = run_thermomech_spine()
@@ -249,6 +250,21 @@ def run_rcwall2d(solver=None, base_name=None):
return doc
def run_thermomech_bimetall(solver=None, base_name=None):
from .thermomech_bimetall import setup
doc = setup()
if base_name is None:
base_name = "Thermomech_Bimetall"
if solver is not None:
base_name += "_" + solver
run_analysis(doc, base_name)
doc.recompute()
return doc
def run_thermomech_flow1d(solver=None, base_name=None):
from .thermomech_flow1d import setup
@@ -290,5 +306,6 @@ def run_all():
run_material_nl_platewithhole()
run_material_multiple_twoboxes()
run_rcwall2d()
run_thermomech_bimetall()
run_thermomech_flow1d()
run_thermomech_spine()

4601
src/Mod/Fem/femexamples/meshes/mesh_thermomech_bimetall_tetra10.py Normal file
View File

File diff suppressed because it is too large Load Diff

193
src/Mod/Fem/femexamples/thermomech_bimetall.py Normal file
View File

@@ -0,0 +1,193 @@
# ***************************************************************************
# * Copyright (c) 2020 Bernd Hahnebach <bernd@bimstatik.org> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * FreeCAD is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with FreeCAD; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
# thermomechanical bimetall
# https://forum.freecadweb.org/viewtopic.php?f=18&t=43040&start=10#p366664
# analytical solution 7.05 mm deflection in the invar material direction
# see post in the forum link
# this file has 7.15 mm max deflection
# to run the example use:
"""
from femexamples.thermomech_bimetall import setup
setup()
"""
import FreeCAD
import ObjectsFem
import Fem
from FreeCAD import Vector, Rotation
import BOPTools.SplitFeatures
mesh_name = "Mesh" # needs to be Mesh to work with unit tests
def init_doc(doc=None):
if doc is None:
doc = FreeCAD.newDocument()
return doc
def setup(doc=None, solvertype="ccxtools"):
# setup model
if doc is None:
doc = init_doc()
# parts
# bottom box
bottom_box_obj = doc.addObject("Part::Box", "BottomBox")
bottom_box_obj.Length = 100
bottom_box_obj.Width = 5
bottom_box_obj.Height = 1
# top box
top_box_obj = doc.addObject("Part::Box", "TopBox")
top_box_obj.Length = 100
top_box_obj.Width = 5
top_box_obj.Height = 1
top_box_obj.Placement = FreeCAD.Placement(
Vector(0, 0, 1),
Rotation(0, 0, 0),
Vector(0, 0, 0),
)
doc.recompute()
# all geom boolean fragment
all_geom_boolfrag_obj = BOPTools.SplitFeatures.makeBooleanFragments(name='BooleanFragments')
all_geom_boolfrag_obj.Objects = [bottom_box_obj, top_box_obj]
if FreeCAD.GuiUp:
bottom_box_obj.ViewObject.hide()
top_box_obj.ViewObject.hide()
doc.recompute()
if FreeCAD.GuiUp:
import FreeCADGui
FreeCADGui.ActiveDocument.activeView().viewAxonometric()
FreeCADGui.SendMsgToActiveView("ViewFit")
# analysis
analysis = ObjectsFem.makeAnalysis(doc, "Analysis")
# solver
if solvertype == "calculix":
solver_object = analysis.addObject(
ObjectsFem.makeSolverCalculix(doc, "SolverCalculiX")
)[0]
elif solvertype == "ccxtools":
solver_object = analysis.addObject(
ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
)[0]
solver_object.WorkingDir = u""
if solvertype == "calculix" or solvertype == "ccxtools":
solver_object.AnalysisType = "thermomech"
solver_object.GeometricalNonlinearity = "linear"
solver_object.ThermoMechSteadyState = True
# solver_object.MatrixSolverType = "default"
solver_object.MatrixSolverType = "spooles" # thomas
solver_object.SplitInputWriter = False
solver_object.IterationsThermoMechMaximum = 2000
# solver_object.IterationsControlParameterTimeUse = True # thermomech spine
# material
material_obj_bottom = analysis.addObject(
ObjectsFem.makeMaterialSolid(doc, "MaterialCopper")
)[0]
mat = material_obj_bottom.Material
mat["Name"] = "Copper"
mat["YoungsModulus"] = "130000 MPa"
mat["PoissonRatio"] = "0.354"
mat["SpecificHeat"] = "385 J/kg/K"
mat["ThermalConductivity"] = "200 W/m/K"
mat["ThermalExpansionCoefficient"] = "0.00002 m/m/K"
material_obj_bottom.Material = mat
material_obj_bottom.References = [(all_geom_boolfrag_obj, "Solid1")]
analysis.addObject(material_obj_bottom)
material_obj_top = analysis.addObject(
ObjectsFem.makeMaterialSolid(doc, "MaterialInvar")
)[0]
mat = material_obj_top.Material
mat["Name"] = "Invar"
mat["YoungsModulus"] = "137000 MPa"
mat["PoissonRatio"] = "0.28"
mat["SpecificHeat"] = "510 J/kg/K"
mat["ThermalConductivity"] = "13 W/m/K"
mat["ThermalExpansionCoefficient"] = "0.0000012 m/m/K"
material_obj_top.Material = mat
material_obj_top.References = [(all_geom_boolfrag_obj, "Solid2")]
analysis.addObject(material_obj_top)
# constraint fixed
con_fixed = analysis.addObject(
ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
)[0]
con_fixed.References = [
(all_geom_boolfrag_obj, "Face1"),
(all_geom_boolfrag_obj, "Face7"),
]
# constraint initial temperature
constraint_initialtemp = analysis.addObject(
ObjectsFem.makeConstraintInitialTemperature(doc, "ConstraintInitialTemperature")
)[0]
constraint_initialtemp.initialTemperature = 273.0
# constraint temperature
constraint_temperature = analysis.addObject(
ObjectsFem.makeConstraintTemperature(doc, "ConstraintTemperature")
)[0]
constraint_temperature.References = [
(all_geom_boolfrag_obj, "Face1"),
(all_geom_boolfrag_obj, "Face2"),
(all_geom_boolfrag_obj, "Face3"),
(all_geom_boolfrag_obj, "Face4"),
(all_geom_boolfrag_obj, "Face5"),
(all_geom_boolfrag_obj, "Face7"),
(all_geom_boolfrag_obj, "Face8"),
(all_geom_boolfrag_obj, "Face9"),
(all_geom_boolfrag_obj, "Face10"),
(all_geom_boolfrag_obj, "Face11"),
]
constraint_temperature.Temperature = 373.0
constraint_temperature.CFlux = 0.0
# mesh
from .meshes.mesh_thermomech_bimetall_tetra10 import create_nodes, create_elements
fem_mesh = Fem.FemMesh()
control = create_nodes(fem_mesh)
if not control:
FreeCAD.Console.PrintError("Error on creating nodes.\n")
control = create_elements(fem_mesh)
if not control:
FreeCAD.Console.PrintError("Error on creating elements.\n")
femmesh_obj = analysis.addObject(
doc.addObject("Fem::FemMeshObject", mesh_name)
)[0]
femmesh_obj.FemMesh = fem_mesh
doc.recompute()
return doc