168 lines
6.4 KiB
Python
168 lines
6.4 KiB
Python
# ***************************************************************************
|
|
# * Copyright (c) 2019 Bernd Hahnebach <bernd@bimstatik.org> *
|
|
# * Copyright (c) 2020 Sudhanshu Dubey <sudhanshu.thethunder@gmail.com *
|
|
# * *
|
|
# * 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.material_nl_platewithhole import setup
|
|
setup()
|
|
"""
|
|
|
|
# Nonlinear material example, plate with hole.
|
|
|
|
# https://forum.freecadweb.org/viewtopic.php?f=24&t=31997&start=30
|
|
# https://forum.freecadweb.org/viewtopic.php?t=33974&start=90
|
|
# https://forum.freecadweb.org/viewtopic.php?t=35893
|
|
# https://forum.freecadweb.org/viewtopic.php?t=23101
|
|
|
|
# plate: 400x200x10 mm
|
|
# hole: diameter 100 mm (half cross section)
|
|
# load: 130 MPa tension
|
|
# linear material: Steel, E = 210000 MPa, my = 0.3
|
|
# nonlinear material: '240.0, 0.0' to '270.0, 0.025'
|
|
# TODO nonlinear material: give more information, use values from harry
|
|
# TODO compare results with example from HarryvL
|
|
|
|
import FreeCAD
|
|
from FreeCAD import Vector as vec
|
|
|
|
import Fem
|
|
import ObjectsFem
|
|
import Part
|
|
from Part import makeCircle as ci
|
|
from Part import makeLine as ln
|
|
|
|
from .manager import get_meshname
|
|
from .manager import init_doc
|
|
|
|
|
|
def get_information():
|
|
return {
|
|
"name": "Material NL Plate with Hole",
|
|
"meshtype": "solid",
|
|
"meshelement": "Tet10",
|
|
"constraints": ["fixed", "force"],
|
|
"solvers": ["calculix"],
|
|
"material": "multimaterial",
|
|
"equation": "mechanical"
|
|
}
|
|
|
|
|
|
def setup(doc=None, solvertype="ccxtools"):
|
|
|
|
# init FreeCAD document
|
|
if doc is None:
|
|
doc = init_doc()
|
|
|
|
# geometric object
|
|
v1 = vec(-200, -100, 0)
|
|
v2 = vec(200, -100, 0)
|
|
v3 = vec(200, 100, 0)
|
|
v4 = vec(-200, 100, 0)
|
|
l1 = ln(v1, v2)
|
|
l2 = ln(v2, v3)
|
|
l3 = ln(v3, v4)
|
|
l4 = ln(v4, v1)
|
|
v5 = vec(0, 0, 0)
|
|
c1 = ci(50, v5)
|
|
face = Part.makeFace([Part.Wire([l1, l2, l3, l4]), c1], "Part::FaceMakerBullseye")
|
|
geom_obj = doc.addObject("Part::Feature", "Hole_Plate")
|
|
geom_obj.Shape = face.extrude(vec(0, 0, 10))
|
|
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.SplitInputWriter = False
|
|
solver_obj.AnalysisType = "static"
|
|
solver_obj.GeometricalNonlinearity = "linear"
|
|
solver_obj.ThermoMechSteadyState = False
|
|
solver_obj.MatrixSolverType = "default"
|
|
solver_obj.IterationsControlParameterTimeUse = False
|
|
solver_obj.GeometricalNonlinearity = 'nonlinear'
|
|
solver_obj.MaterialNonlinearity = 'nonlinear'
|
|
analysis.addObject(solver_obj)
|
|
|
|
# linear material
|
|
material_obj = ObjectsFem.makeMaterialSolid(doc, "Material_lin")
|
|
matprop = material_obj.Material
|
|
matprop["Name"] = "CalculiX-Steel"
|
|
matprop["YoungsModulus"] = "210000 MPa"
|
|
matprop["PoissonRatio"] = "0.30"
|
|
matprop["Density"] = "7900 kg/m^3"
|
|
material_obj.Material = matprop
|
|
analysis.addObject(material_obj)
|
|
|
|
# nonlinear material
|
|
name_nlm = "Material_nonlin"
|
|
nonlinear_mat = ObjectsFem.makeMaterialMechanicalNonlinear(doc, material_obj, name_nlm)
|
|
nonlinear_mat.YieldPoint1 = '240.0, 0.0'
|
|
nonlinear_mat.YieldPoint2 = '270.0, 0.025'
|
|
analysis.addObject(nonlinear_mat)
|
|
# check solver attributes, Nonlinearity needs to be set to nonlinear
|
|
|
|
# constraint fixed
|
|
con_fixed = ObjectsFem.makeConstraintFixed(doc, "ConstraintFixed")
|
|
con_fixed.References = [(geom_obj, "Face4")]
|
|
analysis.addObject(con_fixed)
|
|
|
|
# pressure constraint
|
|
con_pressure = ObjectsFem.makeConstraintPressure(doc, "ConstraintPressure")
|
|
con_pressure.References = [(geom_obj, "Face2")]
|
|
con_pressure.Pressure = 130.0
|
|
con_pressure.Reversed = True
|
|
analysis.addObject(con_pressure)
|
|
|
|
# mesh
|
|
from .meshes.mesh_platewithhole_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
|