suzanne.soy/FreeCAD
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

FEM: materials: some small changes in task panel and ccx writer

Browse Source
This commit is contained in:
Bernd Hahnebach 2016-08-01 21:56:20 +01:00 committed by wmayer
parent eb305c142f
commit 03ca2ebe55
3 changed files with 30 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -155,12 +155,22 @@ 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')
for femobj in self.material_objects: # femobj --> dict, FreeCAD document object is femobj['Object']
mat_obj = femobj['Object']
# get material properties
YM = FreeCAD.Units.Quantity(mat_obj.Material['YoungsModulus'])
YM_in_MPa = YM.getValueAs('MPa')
PR = float(mat_obj.Material['PoissonRatio'])
# get material properties - Currently in SI units: M/kg/s/Kelvin
YM_in_MPa = 1
PR = 1
density_in_tonne_per_mm3 = 1
try:
YM = FreeCAD.Units.Quantity(mat_obj.Material['YoungsModulus'])
YM_in_MPa = 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")
mat_info_name = mat_obj.Material['Name']
mat_name = mat_obj.Name
# write material properties
@ -168,10 +178,13 @@ class FemInputWriterCcx(FemInputWriter.FemInputWriter):
f.write('*MATERIAL, NAME=' + mat_name + '\n')
f.write('*ELASTIC \n')
f.write('{0}, {1:.3f}\n'.format(YM_in_MPa, PR))
density = FreeCAD.Units.Quantity(mat_obj.Material['Density'])
density_in_tone_per_mm3 = float(density.getValueAs('t/mm^3'))
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_tone_per_mm3))
f.write('{0:.3e}, \n'.format(density_in_tonne_per_mm3))
def write_femelementsets(self, f):
f.write('\n***********************************************************\n')

11
src/Mod/Fem/TaskPanelMechanicalMaterial.ui
View File

@ -93,7 +93,7 @@
</size>
</property>
<property name="title">
<string>Properties</string>
<string>Material Properties</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout_7">
<item>
@ -122,6 +122,9 @@
<height>20</height>
</size>
</property>
<property name="text">
<string>200 GPa</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
</property>
@ -176,7 +179,7 @@
<double>0.100000000000000</double>
</property>
<property name="value">
<double>0.000000000000000</double>
<double>0.300000000000000</double>
</property>
</widget>
</item>
@ -202,7 +205,7 @@
</size>
</property>
<property name="text">
<string/>
<string>8000 kg/m^3</string>
</property>
<property name="alignment">
<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
@ -214,7 +217,7 @@
<double>2000000000.000000000000000</double>
</property>
<property name="unit" stdset="0">
<string notr="true">kg/mm^3</string>
<string notr="true">kg/m^3</string>
</property>
<property name="decimals" stdset="0">
<number>3</number>

7
src/Mod/Fem/_TaskPanelMechanicalMaterial.py
View File

@ -122,7 +122,7 @@ class _TaskPanelMechanicalMaterial:
def ym_changed(self, value):
import Units
# FreeCADs standard unit for stress is kPa
old_ym = Units.Quantity(self.material['YoungsModulus'])
old_ym = Units.Quantity(self.material['YoungsModulus']).getValueAs("kPa")
variation = 0.001
if value:
if not (1 - variation < float(old_ym) / value < 1 + variation):
@ -134,15 +134,14 @@ class _TaskPanelMechanicalMaterial:
def density_changed(self, value):
import Units
# FreeCADs standard unit for density is kg/mm^3
old_density = Units.Quantity(self.material['Density'])
old_density = Units.Quantity(self.material['Density']).getValueAs("kg/m^3")
variation = 0.001
if value:
if not (1 - variation < float(old_density) / value < 1 + variation):
# density has changed
material = self.material
value_in_kg_per_m3 = value * 1e9
material['Density'] = unicode(value_in_kg_per_m3) + " kg/m^3"
# material['Density'] = unicode(value) + " kg/mm^3"
material['Density'] = unicode(value_in_kg_per_m3) + " kg/m^3" # SvdW:Keep density in SI units for easier readability
self.material = material
def pr_changed(self, value):