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Fem: units in CalculiX file: mm and N

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This commit is contained in:
Bernd Hahnebach 2015-03-16 07:29:34 +01:00
parent a0892a9c56
commit 5b6360684d
1 changed files with 16 additions and 8 deletions
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24
src/Mod/Fem/MechanicalAnalysis.py
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@ -438,10 +438,10 @@ class _JobControlTaskPanel:
# write material properties
inpfile.write('\n\n\n\n***********************************************************\n')
inpfile.write('** material\n')
inpfile.write('** unit is kPa = mN/mm2 = (kg*mm/s^2) * 1/mm^2 = kg/mm*s^2 = 10e-3 N/mm2 = 10e-3 MPa\n')
inpfile.write('** unit is MPa = N/mm2\n')
inpfile.write('*MATERIAL, Name='+matmap['General_name'] + '\n')
inpfile.write('*ELASTIC \n')
inpfile.write('{0:.3f}, '.format(YM.Value) )
inpfile.write('{0:.3f}, '.format(YM.Value*1E-3) )
inpfile.write('{0:.3f}\n'.format(PR) )
inpfile.write('*SOLID SECTION, Elset=Eall, Material='+matmap['General_name'] + '\n')
@ -467,11 +467,11 @@ class _JobControlTaskPanel:
#inpfile.write('Eall,NEWTON\n')
inpfile.write('\n\n** loads\n')
if ForceObjectType == 'AreaLoad':
Force = (ForceObject.Force * 1000.0) / NbrForceNods
Force = ForceObject.Force / NbrForceNods
vec = ForceObject.DirectionVector
inpfile.write('** direction: ' + str(vec) + '\n')
inpfile.write('** concentrated load [N] distributed on the area of the given faces.\n')
inpfile.write('** ' + str(ForceObject.Force) + ' N * 1000 / ' + str(NbrForceNods) + ' Nodes = ' + str(Force) + ' mN on each node\n')
inpfile.write('** ' + str(ForceObject.Force) + ' N / ' + str(NbrForceNods) + ' Nodes = ' + str(Force) + ' N on each node\n')
inpfile.write('*CLOAD\n')
inpfile.write(NodeSetNameForce + ',1,' + `vec.x * Force` + '\n')
inpfile.write(NodeSetNameForce + ',2,' + `vec.y * Force` + '\n')
@ -503,10 +503,18 @@ class _JobControlTaskPanel:
inpfile.write('**\n')
inpfile.write('** CalculiX Inputfile\n')
inpfile.write('**\n')
inpfile.write('** written by: FreeCAD ' + FcVersionInfo[0] + '.' + FcVersionInfo[1] + '.' + FcVersionInfo[2] + '\n')
inpfile.write('** written on: ' + time.ctime() + '\n')
inpfile.write('** file name: ' + os.path.basename(FreeCAD.ActiveDocument.FileName) + '\n')
inpfile.write('** analysis name: ' + FemGui.getActiveAnalysis().Name + '\n')
inpfile.write('** written by --> FreeCAD ' + FcVersionInfo[0] + '.' + FcVersionInfo[1] + '.' + FcVersionInfo[2] + '\n')
inpfile.write('** written on --> ' + time.ctime() + '\n')
inpfile.write('** file name --> ' + os.path.basename(FreeCAD.ActiveDocument.FileName) + '\n')
inpfile.write('** analysis name --> ' + FemGui.getActiveAnalysis().Name + '\n')
inpfile.write('**\n')
inpfile.write('**\n')
inpfile.write('** Units\n')
inpfile.write('**\n')
inpfile.write('** Geometry (mesh data) --> mm\n')
inpfile.write("** Materials (young's modulus) --> N/mm2 = MPa\n")
inpfile.write('** Loads (nodal loads) --> N\n')
inpfile.write('**\n')
inpfile.write('**\n')
inpfile.close()