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FEM: materials: simplify input writing and add pre checks for material value keys

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This commit is contained in:
Bernd Hahnebach 2016-08-06 21:46:38 +02:00
parent c476bcfeb0
commit 9cbefbd905
5 changed files with 56 additions and 77 deletions
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78
src/Mod/Fem/FemInputWriterCcx.py
View File

@ -262,62 +262,44 @@ class FemInputWriterCcx(FemInputWriter.FemInputWriter):
f.write('** Materials\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('** Young\'s modulus unit is MPa = N/mm2\n')
f.write('** Density\'s unit is t/mm^3\n')
f.write('** Thermal conductivity unit is kW/mm/K = t*mm/K*s^3\n')
f.write('** Specific Heat unit is kJ/t/K = mm^2/s^2/K\n')
if self.analysis_type == "frequency" or self.selfweight_objects:
f.write('** Density\'s unit is t/mm^3\n')
if self.analysis_type == "thermomech":
f.write('** Thermal conductivity unit is kW/mm/K = t*mm/K*s^3\n')
f.write('** Specific Heat unit is kJ/t/K = mm^2/s^2/K\n')
for femobj in self.material_objects: # femobj --> dict, FreeCAD document object is femobj['Object']
mat_obj = femobj['Object']
# get material properties - Currently in SI units: M/kg/s/Kelvin
YM_in_MPa = 1
TC_in_WmK = 1
TEC_in_mmK = 1
SH_in_JkgK = 1
PR = 1
density_in_tonne_per_mm3 = 1
try:
YM = FreeCAD.Units.Quantity(mat_obj.Material['YoungsModulus'])
YM_in_MPa = float(YM.getValueAs('MPa'))
except:
FreeCAD.Console.PrintError("No YoungsModulus defined for material: default used\n")
try:
PR = float(mat_obj.Material['PoissonRatio'])
except:
FreeCAD.Console.PrintError("No PoissonRatio defined for material: default used\n")
try:
TC = FreeCAD.Units.Quantity(mat_obj.Material['ThermalConductivity'])
TC_in_WmK = float(TC.getValueAs('W/m/K')) # SvdW: Add factor to force units to results' base units of t/mm/s/K - W/m/K results in no factor needed
except:
FreeCAD.Console.PrintError("No ThermalConductivity defined for material: default used\n")
try:
TEC = FreeCAD.Units.Quantity(mat_obj.Material['ThermalExpansionCoefficient'])
TEC_in_mmK = float(TEC.getValueAs('mm/mm/K'))
except:
FreeCAD.Console.PrintError("No ThermalExpansionCoefficient defined for material: default used\n")
try:
SH = FreeCAD.Units.Quantity(mat_obj.Material['SpecificHeat'])
SH_in_JkgK = float(SH.getValueAs('J/kg/K')) * 1e+06 # SvdW: Add factor to force units to results' base units of t/mm/s/K
except:
FreeCAD.Console.PrintError("No SpecificHeat defined for material: default used\n")
mat_info_name = mat_obj.Material['Name']
mat_name = mat_obj.Name
# get material properties, Currently in SI units: M/kg/s/Kelvin
YM = FreeCAD.Units.Quantity(mat_obj.Material['YoungsModulus'])
YM_in_MPa = float(YM.getValueAs('MPa'))
PR = float(mat_obj.Material['PoissonRatio'])
if self.analysis_type == "frequency" or self.selfweight_objects:
density = FreeCAD.Units.Quantity(mat_obj.Material['Density'])
density_in_tonne_per_mm3 = float(density.getValueAs('t/mm^3'))
if self.analysis_type == "thermomech":
TC = FreeCAD.Units.Quantity(mat_obj.Material['ThermalConductivity'])
TC_in_WmK = float(TC.getValueAs('W/m/K')) # SvdW: Add factor to force units to results' base units of t/mm/s/K - W/m/K results in no factor needed
TEC = FreeCAD.Units.Quantity(mat_obj.Material['ThermalExpansionCoefficient'])
TEC_in_mmK = float(TEC.getValueAs('mm/mm/K'))
SH = FreeCAD.Units.Quantity(mat_obj.Material['SpecificHeat'])
SH_in_JkgK = float(SH.getValueAs('J/kg/K')) * 1e+06 # SvdW: Add factor to force units to results' base units of t/mm/s/K
# write material properties
f.write('**FreeCAD material name: ' + mat_info_name + '\n')
f.write('** FreeCAD material name: ' + mat_info_name + '\n')
f.write('*MATERIAL, NAME=' + mat_name + '\n')
f.write('*ELASTIC \n')
f.write('{0:.0f}, {1:.3f}\n'.format(YM_in_MPa, PR))
try:
density = FreeCAD.Units.Quantity(mat_obj.Material['Density'])
density_in_tonne_per_mm3 = float(density.getValueAs('t/mm^3'))
except:
FreeCAD.Console.PrintError("No Density defined for material: default used\n")
f.write('*DENSITY \n')
f.write('{0:.3e}, \n'.format(density_in_tonne_per_mm3))
f.write('*CONDUCTIVITY \n')
f.write('{0:.3f}, \n'.format(TC_in_WmK))
f.write('*EXPANSION \n')
f.write('{0:.3e}, \n'.format(TEC_in_mmK))
f.write('*SPECIFIC HEAT \n')
f.write('{0:.3e}, \n'.format(SH_in_JkgK))
if self.analysis_type == "frequency" or self.selfweight_objects:
f.write('*DENSITY \n')
f.write('{0:.3e}, \n'.format(density_in_tonne_per_mm3))
if self.analysis_type == "thermomech":
f.write('*CONDUCTIVITY \n')
f.write('{0:.3f}, \n'.format(TC_in_WmK))
f.write('*EXPANSION \n')
f.write('{0:.3e}, \n'.format(TEC_in_mmK))
f.write('*SPECIFIC HEAT \n')
f.write('{0:.3e}, \n'.format(SH_in_JkgK))
def write_femelementsets(self, f):
f.write('\n***********************************************************\n')

27
src/Mod/Fem/FemTools.py
View File

@ -321,6 +321,7 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
message += "FEM mesh has no volume and no shell elements, either define a beam section or provide a FEM mesh with volume elements.\n"
if self.mesh.FemMesh.VolumeCount == 0 and self.mesh.FemMesh.FaceCount == 0 and self.mesh.FemMesh.EdgeCount == 0:
message += "FEM mesh has neither volume nor shell or edge elements. Provide a FEM mesh with elements!\n"
# materials
if not self.materials:
message += "No material object defined in the analysis\n"
has_no_references = False
@ -329,17 +330,35 @@ class FemTools(QtCore.QRunnable, QtCore.QObject):
if has_no_references is True:
message += "More than one material has an empty references list (Only one empty references list is allowed!).\n"
has_no_references = True
for m in self.materials:
mat_map = m['Object'].Material
if 'YoungsModulus' not in mat_map:
message += "No YoungsModulus defined for at least one material.\n"
if 'PoissonRatio' not in mat_map:
message += "No PoissonRatio defined for at least one material.\n"
if self.analysis_type == "frequency" or self.selfweight_constraints:
if 'Density' not in mat_map:
message += "No Density defined for at least one material.\n"
if self.analysis_type == "thermomech":
if 'ThermalConductivity' not in mat_map:
message += "Thermomechanical analysis: No ThermalConductivity defined for at least one material.\n"
if 'ThermalExpansionCoefficient' not in mat_map:
message += "Thermomechanical analysis: No ThermalExpansionCoefficient defined for at least one material.\n"
if 'SpecificHeat' not in mat_map:
message += "Thermomechanical analysis: No SpecificHeat defined for at least one material.\n"
# constraints
if self.analysis_type == "static":
if not (self.fixed_constraints or self.displacement_constraints):
message += "Neither a constraint fixed nor a contraint displacement defined in the static analysis\n"
message += "Static analysis: Neither constraint fixed nor constraint displacement defined.\n"
if self.analysis_type == "static":
if not (self.force_constraints or self.pressure_constraints or self.selfweight_constraints):
message += "Neither constraint force nor constraint pressure or a constraint selfweight defined in the static analysis\n"
message += "Static analysis: Neither constraint force nor constraint pressure or a constraint selfweight defined.\n"
if self.analysis_type == "thermomech":
if not self.initialtemperature_constraints:
message += "No initial temperature defined in the thermomechanical analysis\n"
message += "Thermomechanical analysis: No initial temperature defined.\n"
if len(self.initialtemperature_constraints) > 1:
message += "Only one initial temperature is allowed in thermomechanical analysis\n"
message += "Thermomechanical analysis: Only one initial temperature is allowed.\n"
# beam sections and shell thicknesses
if self.beam_sections:
if self.shell_thicknesses:
# this needs to be checked only once either here or in shell_thicknesses

10
src/Mod/Fem/test_files/ccx/cube_frequency.inp
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@ -469,20 +469,12 @@ Eall
** written by write_materials function
** Young's modulus unit is MPa = N/mm2
** Density's unit is t/mm^3
** Thermal conductivity unit is kW/mm/K = t*mm/K*s^3
** Specific Heat unit is kJ/t/K = mm^2/s^2/K
**FreeCAD material name: Steel-Generic
** FreeCAD material name: Steel-Generic
*MATERIAL, NAME=MechanicalMaterial
*ELASTIC
200000, 0.300
*DENSITY
7.900e-09,
*CONDUCTIVITY
1.000,
*EXPANSION
1.000e+00,
*SPECIFIC HEAT
1.000e+00,
***********************************************************
** Sections

13
src/Mod/Fem/test_files/ccx/cube_static.inp
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@ -468,21 +468,10 @@ Eall
** Materials
** written by write_materials function
** Young's modulus unit is MPa = N/mm2
** Density's unit is t/mm^3
** Thermal conductivity unit is kW/mm/K = t*mm/K*s^3
** Specific Heat unit is kJ/t/K = mm^2/s^2/K
**FreeCAD material name: Steel-Generic
** FreeCAD material name: Steel-Generic
*MATERIAL, NAME=MechanicalMaterial
*ELASTIC
200000, 0.300
*DENSITY
7.900e-09,
*CONDUCTIVITY
1.000,
*EXPANSION
1.000e+00,
*SPECIFIC HEAT
1.000e+00,
***********************************************************
** Sections

5
src/Mod/Fem/test_files/ccx/spine_thermomech.inp
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@ -98,15 +98,12 @@ Eall
** Materials
** written by write_materials function
** Young's modulus unit is MPa = N/mm2
** Density's unit is t/mm^3
** Thermal conductivity unit is kW/mm/K = t*mm/K*s^3
** Specific Heat unit is kJ/t/K = mm^2/s^2/K
**FreeCAD material name: Steel-Generic
** FreeCAD material name: Steel-Generic
*MATERIAL, NAME=MechanicalMaterial
*ELASTIC
200000, 0.300
*DENSITY
7.900e-09,
*CONDUCTIVITY
43.270,
*EXPANSION