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FEM: Mystran solver, add examples and writer unit tests

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This commit is contained in:
Bernd Hahnebach
2021-07-30 13:08:18 +02:00
parent cdcd271b4c
commit 005c66f4ec
22 changed files with 3342 additions and 8 deletions
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2
src/Mod/Fem/femexamples/ccx_cantilever_base_edge.py
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@@ -71,6 +71,8 @@ def setup_cantilever_base_edge(doc=None, solvertype="ccxtools"):
elif solvertype == "ccxtools":
solver_obj = ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
solver_obj.WorkingDir = u""
elif solvertype == "mystran":
solver_obj = ObjectsFem.makeSolverMystran(doc, "SolverMystran")
else:
FreeCAD.Console.PrintWarning(
"Not known or not supported solver type: {}. "

2
src/Mod/Fem/femexamples/ccx_cantilever_base_face.py
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@@ -61,6 +61,8 @@ def setup_cantilever_base_face(doc=None, solvertype="ccxtools"):
elif solvertype == "ccxtools":
solver_obj = ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
solver_obj.WorkingDir = u""
elif solvertype == "mystran":
solver_obj = ObjectsFem.makeSolverMystran(doc, "SolverMystran")
elif solvertype == "z88":
solver_obj = ObjectsFem.makeSolverZ88(doc, "SolverZ88")
else:

2
src/Mod/Fem/femexamples/ccx_cantilever_base_solid.py
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@@ -60,6 +60,8 @@ def setup_cantilever_base_solid(doc=None, solvertype="ccxtools"):
elif solvertype == "elmer":
solver_obj = ObjectsFem.makeSolverElmer(doc, "SolverElmer")
ObjectsFem.makeEquationElasticity(doc, solver_obj)
elif solvertype == "mystran":
solver_obj = ObjectsFem.makeSolverMystran(doc, "SolverMystran")
elif solvertype == "z88":
solver_obj = ObjectsFem.makeSolverZ88(doc, "SolverZ88")
else:

2
src/Mod/Fem/femexamples/ccx_cantilever_ele_quad4.py
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@@ -37,7 +37,7 @@ def get_information():
"meshtype": "face",
"meshelement": "Quad4",
"constraints": ["fixed", "force"],
"solvers": ["calculix"],
"solvers": ["calculix", "mystran"],
"material": "solid",
"equation": "mechanical"
}

2
src/Mod/Fem/femexamples/ccx_cantilever_ele_seg2.py
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@@ -37,7 +37,7 @@ def get_information():
"meshtype": "edge",
"meshelement": "Seg2",
"constraints": ["fixed", "force"],
"solvers": ["calculix"],
"solvers": ["calculix", "mystran"],
"material": "solid",
"equation": "mechanical"
}

2
src/Mod/Fem/femexamples/ccx_cantilever_ele_tetra4.py
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@@ -36,7 +36,7 @@ def get_information():
"meshtype": "solid",
"meshelement": "Tetra4",
"constraints": ["fixed", "force"],
"solvers": ["calculix", "elmer", "z88"],
"solvers": ["calculix", "elmer", "mystran", "z88"],
"material": "solid",
"equation": "mechanical"
}

2
src/Mod/Fem/femexamples/ccx_cantilever_ele_tria3.py
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@@ -37,7 +37,7 @@ def get_information():
"meshtype": "face",
"meshelement": "Tria3",
"constraints": ["fixed", "force"],
"solvers": ["calculix"],
"solvers": ["calculix", "mystran"],
"material": "solid",
"equation": "mechanical"
}

2
src/Mod/Fem/femexamples/ccx_cantilever_faceload.py
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@@ -35,7 +35,7 @@ def get_information():
"meshtype": "solid",
"meshelement": "Tet10",
"constraints": ["fixed", "force"],
"solvers": ["calculix", "z88", "elmer"],
"solvers": ["calculix", "elmer", "mystran", "z88"],
"material": "solid",
"equation": "mechanical"
}

2
src/Mod/Fem/femexamples/ccx_cantilever_nodeload.py
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@@ -35,7 +35,7 @@ def get_information():
"meshtype": "solid",
"meshelement": "Tet10",
"constraints": ["fixed", "force"],
"solvers": ["calculix", "elmer", "z88"],
"solvers": ["calculix", "elmer", "mystran", "z88"],
"material": "solid",
"equation": "mechanical"
}

69
src/Mod/Fem/femexamples/meshes/mesh_plate_mystran_quad4.py Normal file
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@@ -0,0 +1,69 @@
def create_nodes(femmesh):
# nodes
femmesh.addNode(0.0, 0.0, 0.0, 1)
femmesh.addNode(2.0, 0.0, 0.0, 2)
femmesh.addNode(4.0, 0.0, 0.0, 3)
femmesh.addNode(6.0, 0.0, 0.0, 4)
femmesh.addNode(8.0, 0.0, 0.0, 5)
femmesh.addNode(10.0, 0.0, 0.0, 6)
femmesh.addNode(0.0, 2.0, 0.0, 7)
femmesh.addNode(2.0, 2.0, 0.0, 8)
femmesh.addNode(4.0, 2.0, 0.0, 9)
femmesh.addNode(6.0, 2.0, 0.0, 10)
femmesh.addNode(8.0, 2.0, 0.0, 11)
femmesh.addNode(10.0, 2.0, 0.0, 12)
femmesh.addNode(0.0, 4.0, 0.0, 13)
femmesh.addNode(2.0, 4.0, 0.0, 14)
femmesh.addNode(4.0, 4.0, 0.0, 15)
femmesh.addNode(6.0, 4.0, 0.0, 16)
femmesh.addNode(8.0, 4.0, 0.0, 17)
femmesh.addNode(10.0, 4.0, 0.0, 18)
femmesh.addNode(0.0, 6.0, 0.0, 19)
femmesh.addNode(2.0, 6.0, 0.0, 20)
femmesh.addNode(4.0, 6.0, 0.0, 21)
femmesh.addNode(6.0, 6.0, 0.0, 22)
femmesh.addNode(8.0, 6.0, 0.0, 23)
femmesh.addNode(10.0, 6.0, 0.0, 24)
femmesh.addNode(0.0, 8.0, 0.0, 25)
femmesh.addNode(2.0, 8.0, 0.0, 26)
femmesh.addNode(4.0, 8.0, 0.0, 27)
femmesh.addNode(6.0, 8.0, 0.0, 28)
femmesh.addNode(8.0, 8.0, 0.0, 29)
femmesh.addNode(10.0, 8.0, 0.0, 30)
femmesh.addNode(0.0, 10.0, 0.0, 31)
femmesh.addNode(2.0, 10.0, 0.0, 32)
femmesh.addNode(4.0, 10.0, 0.0, 33)
femmesh.addNode(6.0, 10.0, 0.0, 34)
femmesh.addNode(8.0, 10.0, 0.0, 35)
femmesh.addNode(10.0, 10.0, 0.0, 36)
return True
def create_elements(femmesh):
# elements
femmesh.addFace([1, 2, 8, 7], 1)
femmesh.addFace([2, 3, 9, 8], 2)
femmesh.addFace([3, 4, 10, 9], 3)
femmesh.addFace([4, 5, 11, 10], 4)
femmesh.addFace([5, 6, 12, 11], 5)
femmesh.addFace([7, 8, 14, 13], 6)
femmesh.addFace([8, 9, 15, 14], 7)
femmesh.addFace([9, 10, 16, 15], 8)
femmesh.addFace([10, 11, 17, 16], 9)
femmesh.addFace([11, 12, 18, 17], 10)
femmesh.addFace([13, 14, 20, 19], 11)
femmesh.addFace([14, 15, 21, 20], 12)
femmesh.addFace([15, 16, 22, 21], 13)
femmesh.addFace([16, 17, 23, 22], 14)
femmesh.addFace([17, 18, 24, 23], 15)
femmesh.addFace([19, 20, 26, 25], 16)
femmesh.addFace([20, 21, 27, 26], 17)
femmesh.addFace([21, 22, 28, 27], 18)
femmesh.addFace([22, 23, 29, 28], 19)
femmesh.addFace([23, 24, 30, 29], 20)
femmesh.addFace([25, 26, 32, 31], 21)
femmesh.addFace([26, 27, 33, 32], 22)
femmesh.addFace([27, 28, 34, 33], 23)
femmesh.addFace([28, 29, 35, 34], 24)
femmesh.addFace([29, 30, 36, 35], 25)
return True

196
src/Mod/Fem/femexamples/mystran_plate.py Normal file
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@@ -0,0 +1,196 @@
# ***************************************************************************
# * Copyright (c) 2021 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. *
# * *
# * This program 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 this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
import FreeCAD
from BOPTools import SplitFeatures
import Fem
import ObjectsFem
from . import manager
from .manager import get_meshname
from .manager import init_doc
def get_information():
return {
"name": "Mystran Plate",
"meshtype": "face",
"meshelement": "Quad4",
"constraints": ["displacement", "force"],
"solvers": ["calculix", "elmer", "mystran"],
"material": "solid",
"equation": "mechanical"
}
def get_explanation(header=""):
return header + """
To run the example from Python console use:
from femexamples.buckling_platebuckling import setup
setup()
See forum topic post:
https://forum.freecadweb.org/viewtopic.php?f=18&t=60320&start=10#p517884
This version here uses some real value for the Young's Modulus
The CalculiX steel is used
plate 10 mm x 10 mm * 0.3 mm
one each mesh node on one edge 100 N tension force
Does not work on Z88 because Z88 does not support quad4 elements
"""
def setup(doc=None, solvertype="ccxtools"):
# init FreeCAD document
if doc is None:
doc = init_doc()
# explanation object
# just keep the following line and change text string in get_explanation method
manager.add_explanation_obj(doc, get_explanation(manager.get_header(get_information())))
# geometric object
plate = doc.addObject("Part::Plane", "Plate")
plate.Width = 10
plate.Length = 10
force_pt1 = doc.addObject("Part::Vertex", "ForcePT1")
force_pt1.X = 10
force_pt1.Y = 2
force_pt2 = doc.addObject("Part::Vertex", "ForcePT2")
force_pt2.X = 10
force_pt2.Y = 4
force_pt3 = doc.addObject("Part::Vertex", "ForcePT3")
force_pt3.X = 10
force_pt3.Y = 6
force_pt4 = doc.addObject("Part::Vertex", "ForcePT4")
force_pt4.X = 10
force_pt4.Y = 8
doc.recompute()
# all geom boolean fragment
geom_obj = SplitFeatures.makeBooleanFragments(name='ThePointPlate')
geom_obj.Objects = [plate, force_pt1, force_pt2, force_pt3, force_pt4]
doc.recompute()
if FreeCAD.GuiUp:
plate.ViewObject.hide()
force_pt1.ViewObject.hide()
force_pt2.ViewObject.hide()
force_pt3.ViewObject.hide()
force_pt4.ViewObject.hide()
doc.recompute()
if FreeCAD.GuiUp:
geom_obj.ViewObject.PointSize = 10
geom_obj.ViewObject.Document.activeView().viewAxonometric()
geom_obj.ViewObject.Document.activeView().fitAll()
# analysis
analysis = ObjectsFem.makeAnalysis(doc, "Analysis")
# solver
if solvertype == "calculix":
solver_obj = ObjectsFem.makeSolverCalculix(doc, "SolverCalculiX")
elif solvertype == "ccxtools":
solver_obj = ObjectsFem.makeSolverCalculixCcxTools(doc, "CalculiXccxTools")
solver_obj.WorkingDir = u""
elif solvertype == "elmer":
solver_obj = ObjectsFem.makeSolverElmer(doc, "SolverElmer")
ObjectsFem.makeEquationElasticity(doc, solver_obj)
elif solvertype == "mystran":
solver_obj = ObjectsFem.makeSolverMystran(doc, "SolverMystran")
elif solvertype == "z88":
solver_obj = ObjectsFem.makeSolverZ88(doc, "SolverZ88")
else:
FreeCAD.Console.PrintWarning(
"Not known or not supported solver type: {}. "
"No solver object was created.\n".format(solvertype)
)
if solvertype == "calculix" or solvertype == "ccxtools":
solver_obj.SplitInputWriter = False
solver_obj.AnalysisType = "static"
solver_obj.GeometricalNonlinearity = "linear"
solver_obj.ThermoMechSteadyState = False
solver_obj.MatrixSolverType = "default"
solver_obj.IterationsControlParameterTimeUse = False
analysis.addObject(solver_obj)
# shell thickness
thickness_obj = ObjectsFem.makeElementGeometry2D(doc, 0.3, 'Thickness')
analysis.addObject(thickness_obj)
# material
material_obj = ObjectsFem.makeMaterialSolid(doc, "FemMaterial")
mat = material_obj.Material
mat["Name"] = "CalculiX-Steel"
mat["YoungsModulus"] = "210000 MPa"
mat["PoissonRatio"] = "0.30"
material_obj.Material = mat
analysis.addObject(material_obj)
# constraint fixed
con_fixed = ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
con_fixed.References = [(geom_obj, "Edge1")]
analysis.addObject(con_fixed)
# constraint force
con_force = ObjectsFem.makeConstraintForce(doc, "ConstraintForce")
con_force.References = [
(geom_obj, "Vertex7"),
(geom_obj, "Vertex1"),
(geom_obj, "Vertex2"),
(geom_obj, "Vertex3"),
(geom_obj, "Vertex4"),
(geom_obj, "Vertex8"),
]
con_force.Force = 600 # 600 N on six nodes == 100 N/Node
con_force.Reversed = False
con_force.Direction = (geom_obj, ["Edge2"])
analysis.addObject(con_force)
# mesh
from .meshes.mesh_plate_mystran_quad4 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(ObjectsFem.makeMeshGmsh(doc, get_meshname()))[0]
femmesh_obj.FemMesh = fem_mesh
femmesh_obj.Part = geom_obj
femmesh_obj.SecondOrderLinear = False
femmesh_obj.CharacteristicLengthMax = "1.0 mm"
femmesh_obj.ElementDimension = "2D"
femmesh_obj.ElementOrder = "1st"
doc.recompute()
return doc