152 lines
7.2 KiB
Python
152 lines
7.2 KiB
Python
# Unit test for the FEM module
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#***************************************************************************
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#* Copyright (c) 2015 - FreeCAD Developers *
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#* Author: Przemo Firszt <przemo@firszt.eu> *
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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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#* FreeCAD 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 FreeCAD; 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 Fem
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import FemTools
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import FreeCAD
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import MechanicalAnalysis
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import csv
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import hashlib
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import tempfile
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import unittest
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# md5sum of src/Mod/Fem/test_file.inp
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# All changes in ccxInpWriter resulting in changes of the .inp file should
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# be reflected in src/Mod/Fem/test_file.inp and the m5d_standard variable
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# should be updated
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md5_standard = "55b91f57fdc13ec471689e63f9529d38"
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mesh_name = 'Mesh'
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working_dir = tempfile.gettempdir() + '/FEM/'
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mesh_points_file = FreeCAD.getHomePath() + 'Mod/Fem/mesh_points.csv'
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mesh_volumes_file = FreeCAD.getHomePath() + 'Mod/Fem/mesh_volumes.csv'
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class FemTest(unittest.TestCase):
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def setUp(self):
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try:
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FreeCAD.setActiveDocument("FemTest")
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except:
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FreeCAD.newDocument("FemTest")
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finally:
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FreeCAD.setActiveDocument("FemTest")
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self.active_doc = FreeCAD.ActiveDocument
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self.box = self.active_doc.addObject("Part::Box", "Box")
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self.active_doc.recompute()
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def create_new_analysis(self):
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self.analysis = MechanicalAnalysis.makeMechanicalAnalysis('MechanicalAnalysis')
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self.active_doc.recompute()
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def create_new_mesh(self):
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self.mesh_object = self.active_doc.addObject('Fem::FemMeshObject', mesh_name)
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self.mesh = Fem.FemMesh()
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with open(mesh_points_file, 'r') as points_file:
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reader = csv.reader(points_file)
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for p in reader:
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self.mesh.addNode(float(p[0]), float(p[1]), float(p[2]), int(p[3]))
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with open(mesh_volumes_file, 'r') as volumes_file:
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reader = csv.reader(volumes_file)
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for _v in reader:
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v = [int(x) for x in _v]
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self.mesh.addVolume([v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]])
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self.mesh_object.FemMesh = self.mesh
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self.active_doc.recompute()
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def create_new_material(self):
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self.new_material_object = self.active_doc.addObject("App::MaterialObjectPython", 'MechanicalMaterial')
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mat = self.new_material_object.Material
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mat['Name'] = "Test Material"
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mat['YoungsModulus'] = "20000 MPa"
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mat['PoissonRatio'] = "0.36"
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mat['Density'] = "1000 kg/m^3"
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self.new_material_object.Material = mat
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def create_fixed_constraint(self):
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self.fixed_constraint = self.active_doc.addObject("Fem::ConstraintFixed", "FemConstraintFixed")
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self.fixed_constraint.References = [(self.box, "Face1")]
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def create_force_constraint(self):
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self.force_constraint = self.active_doc.addObject("Fem::ConstraintForce", "FemConstraintForce")
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self.force_constraint.References = [(self.box, "Face3")]
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self.force_constraint.Force = 10.000000
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self.force_constraint.Direction = (self.box, ["Edge12"])
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self.force_constraint.Reversed = True
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def create_pressure_constraint(self):
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self.pressure_constraint = self.active_doc.addObject("Fem::ConstraintPressure", "FemConstraintPressure")
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self.pressure_constraint.References = [(self.box, "Face4")]
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self.pressure_constraint.Pressure = 10.000000
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self.pressure_constraint.Reversed = True
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def test_new_analysis(self):
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FreeCAD.Console.PrintMessage('\nChecking FEM new analysis...\n')
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self.create_new_analysis()
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self.assertTrue(self.analysis, "FemTest of new analysis failed")
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FreeCAD.Console.PrintMessage('\nChecking FEM new mesh...\n')
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self.create_new_mesh()
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self.assertTrue(self.mesh, "FemTest of new mesh failed")
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self.analysis.Member = self.analysis.Member + [self.mesh_object]
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FreeCAD.Console.PrintMessage('\nChecking FEM new material...\n')
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self.create_new_material()
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self.assertTrue(self.new_material_object, "FemTest of new material failed")
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self.analysis.Member = self.analysis.Member + [self.new_material_object]
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FreeCAD.Console.PrintMessage('\nChecking FEM new fixed constraint...\n')
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self.create_fixed_constraint()
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self.assertTrue(self.fixed_constraint, "FemTest of new fixed constraint failed")
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self.analysis.Member = self.analysis.Member + [self.fixed_constraint]
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FreeCAD.Console.PrintMessage('\nChecking FEM new force constraint...\n')
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self.create_force_constraint()
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self.assertTrue(self.force_constraint, "FemTest of new force constraint failed")
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self.analysis.Member = self.analysis.Member + [self.force_constraint]
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FreeCAD.Console.PrintMessage('\nChecking FEM new pressure constraint...\n')
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self.create_pressure_constraint()
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self.assertTrue(self.pressure_constraint, "FemTest of new pressure constraint failed")
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self.analysis.Member = self.analysis.Member + [self.pressure_constraint]
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fea = FemTools.FemTools(self.analysis)
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FreeCAD.Console.PrintMessage('\nChecking FEM inp file prerequisites...\n')
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error = fea.check_prerequisites()
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self.assertFalse(error, "FemTools check_prerequisites returned error message: {}".format(error))
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FreeCAD.Console.PrintMessage('\nChecking FEM inp file write...\n')
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fea.setup_working_dir(working_dir)
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error = fea.write_inp_file()
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md5_test = hashlib.md5(open(working_dir + mesh_name + '.inp', 'rb').read()).hexdigest()
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self.assertEqual(md5_standard, md5_test, "FemTools write_inp_file failed. md5 \
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sums don't match. md5 for the test file is {}".format(md5_test))
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def tearDown(self):
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FreeCAD.closeDocument("FemTest")
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pass
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