182 lines
6.7 KiB
Python
182 lines
6.7 KiB
Python
# ***************************************************************************
|
|
# * Copyright (c) 2020 Sudhanshu Dubey <sudhanshu.thethunder@gmail.com> *
|
|
# * 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. *
|
|
# * *
|
|
# * 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 *
|
|
# * *
|
|
# ***************************************************************************
|
|
|
|
# to run the example use:
|
|
"""
|
|
from femexamples.constraint_transform_torque import setup()
|
|
setup()
|
|
|
|
"""
|
|
|
|
# constraint transform with a constraint force
|
|
# https://forum.freecadweb.org/viewtopic.php?t=19037
|
|
# https://forum.freecadweb.org/viewtopic.php?t=18970
|
|
|
|
import FreeCAD
|
|
|
|
import Fem
|
|
import ObjectsFem
|
|
from Part import makeLine
|
|
|
|
from . import manager
|
|
from .manager import get_meshname
|
|
from .manager import init_doc
|
|
|
|
|
|
def get_information():
|
|
return {
|
|
"name": "Constraint Transform Torque",
|
|
"meshtype": "solid",
|
|
"meshelement": "Tet10",
|
|
"constraints": ["fixed", "force", "transform"],
|
|
"solvers": ["calculix", "ccxtools"],
|
|
"material": "solid",
|
|
"equation": "mechanical"
|
|
}
|
|
|
|
|
|
def get_explanation(header=""):
|
|
return header + """
|
|
|
|
To run the example from Python console use:
|
|
from femexamples.constraint_transform_torque import setup
|
|
setup()
|
|
|
|
|
|
See forum topic post:
|
|
https://forum.freecadweb.org/viewtopic.php?f=18&t=19037&start=10#p515447
|
|
https://forum.freecadweb.org/viewtopic.php?t=19037
|
|
https://forum.freecadweb.org/viewtopic.php?t=18970
|
|
|
|
constraint transform with a constraint force
|
|
|
|
"""
|
|
|
|
|
|
def setup(doc=None, solvertype="ccxtools"):
|
|
|
|
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())))
|
|
|
|
# line for load direction
|
|
sh_load_line = makeLine(FreeCAD.Vector(0, 0, 0), FreeCAD.Vector(0, 10, 0))
|
|
load_line = doc.addObject("Part::Feature", "Load_direction_line")
|
|
load_line.Shape = sh_load_line
|
|
doc.recompute()
|
|
if FreeCAD.GuiUp:
|
|
load_line.ViewObject.LineWidth = 5.0
|
|
load_line.ViewObject.LineColor = (1.0, 0.0, 0.0)
|
|
|
|
# geometry object
|
|
# name is important because the other method in this module use obj name
|
|
cylinder1 = doc.addObject("Part::Cylinder", "Cylinder1")
|
|
cylinder1.Height = "50 mm"
|
|
cylinder1.Radius = "5 mm"
|
|
cylinder2 = doc.addObject("Part::Cylinder", "Cylinder2")
|
|
cylinder2.Height = "50 mm"
|
|
cylinder2.Radius = "4 mm"
|
|
geom_obj = doc.addObject("Part::Cut", "Cut")
|
|
geom_obj.Base = cylinder1
|
|
geom_obj.Tool = cylinder2
|
|
doc.recompute()
|
|
|
|
if FreeCAD.GuiUp:
|
|
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""
|
|
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.AnalysisType = "static"
|
|
solver_obj.GeometricalNonlinearity = "linear"
|
|
solver_obj.ThermoMechSteadyState = False
|
|
solver_obj.MatrixSolverType = "default"
|
|
solver_obj.IterationsControlParameterTimeUse = False
|
|
solver_obj.SplitInputWriter = False
|
|
analysis.addObject(solver_obj)
|
|
|
|
# material
|
|
material_obj = ObjectsFem.makeMaterialSolid(doc, "MechanicalMaterial")
|
|
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, "Face3")]
|
|
analysis.addObject(con_fixed)
|
|
|
|
# constraint force
|
|
con_force = ObjectsFem.makeConstraintForce(doc, "ConstraintForce")
|
|
con_force.References = [(geom_obj, "Face1")]
|
|
con_force.Force = 2500.0 # 2500 N = 2.5 kN
|
|
con_force.Direction = (load_line, ["Edge1"])
|
|
con_force.Reversed = True
|
|
analysis.addObject(con_force)
|
|
|
|
# constraint transform
|
|
con_transform = ObjectsFem.makeConstraintTransform(doc, name="ConstraintTransform")
|
|
con_transform.References = [(geom_obj, "Face1")]
|
|
con_transform.TransformType = "Cylindrical"
|
|
con_transform.X_rot = 0.0
|
|
con_transform.Y_rot = 0.0
|
|
con_transform.Z_rot = 0.0
|
|
analysis.addObject(con_transform)
|
|
|
|
# mesh
|
|
from .meshes.mesh_transform_torque_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(ObjectsFem.makeMeshGmsh(doc, get_meshname()))[0]
|
|
femmesh_obj.FemMesh = fem_mesh
|
|
femmesh_obj.Part = geom_obj
|
|
femmesh_obj.SecondOrderLinear = False
|
|
|
|
doc.recompute()
|
|
return doc
|