38a01939e0
* Migrate domain name from freecadweb to freecad * Migrate src/Mod/Material files * Migrate Stylesheet related files * Migrate *.svg files * Migrate miscellaneous files * Migrate some build files * Migrate recently added TD AR_IRAM template files Closes #6415
119 lines
5.9 KiB
Python
119 lines
5.9 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org> *
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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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# * This program 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 this program; 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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__title__ = "FreeCAD FEM calculix write inpfile materials"
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__author__ = "Bernd Hahnebach"
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__url__ = "https://www.freecad.org"
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import FreeCAD
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def write_femelement_material(f, ccxwriter):
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# floats read from ccx should use {:.13G}, see comment in writer module
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# see unit comment in writer module
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def is_density_needed():
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if ccxwriter.analysis_type == "frequency":
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return True
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if (
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ccxwriter.analysis_type == "thermomech"
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and not ccxwriter.solver_obj.ThermoMechSteadyState
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):
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return True
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if ccxwriter.member.cons_centrif:
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return True
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if ccxwriter.member.cons_selfweight:
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return True
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return False
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f.write("\n{}\n".format(59 * "*"))
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f.write("** Materials\n")
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f.write("** see information about units at file end\n")
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for femobj in ccxwriter.member.mats_linear:
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# femobj --> dict, FreeCAD document object is femobj["Object"]
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mat_obj = femobj["Object"]
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mat_info_name = mat_obj.Material["Name"]
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mat_name = mat_obj.Name
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mat_label = mat_obj.Label
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# get material properties of solid material, Currently in SI units: M/kg/s/Kelvin
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if mat_obj.Category == "Solid":
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YM = FreeCAD.Units.Quantity(mat_obj.Material["YoungsModulus"])
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YM_in_MPa = YM.getValueAs("MPa").Value
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PR = float(mat_obj.Material["PoissonRatio"])
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if is_density_needed() is True:
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density = FreeCAD.Units.Quantity(mat_obj.Material["Density"])
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density_in_tonne_per_mm3 = density.getValueAs("t/mm^3").Value
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if ccxwriter.analysis_type == "thermomech":
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TC = FreeCAD.Units.Quantity(mat_obj.Material["ThermalConductivity"])
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# SvdW: Add factor to force units to results base units
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# of t/mm/s/K - W/m/K results in no factor needed
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TC_in_WmK = TC.getValueAs("W/m/K").Value
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SH = FreeCAD.Units.Quantity(mat_obj.Material["SpecificHeat"])
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# SvdW: Add factor to force units to results base units of t/mm/s/K
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# FIXME: why not get it directly in the units needed ?
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SH_in_JkgK = SH.getValueAs("J/kg/K").Value * 1e+06
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if mat_obj.Category == "Solid":
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TEC = FreeCAD.Units.Quantity(mat_obj.Material["ThermalExpansionCoefficient"])
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TEC_in_mmK = TEC.getValueAs("mm/mm/K").Value
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elif mat_obj.Category == "Fluid":
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DV = FreeCAD.Units.Quantity(mat_obj.Material["DynamicViscosity"])
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DV_in_tmms = DV.getValueAs("t/mm/s").Value
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# write material properties
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f.write("** FreeCAD material name: {}\n".format(mat_info_name))
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f.write("** {}\n".format(mat_label))
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f.write("*MATERIAL, NAME={}\n".format(mat_name))
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if mat_obj.Category == "Solid":
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f.write("*ELASTIC\n")
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f.write("{:.13G},{:.13G}\n".format(YM_in_MPa, PR))
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if is_density_needed() is True:
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f.write("*DENSITY\n")
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f.write("{:.13G}\n".format(density_in_tonne_per_mm3))
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if ccxwriter.analysis_type == "thermomech":
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if mat_obj.Category == "Solid":
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f.write("*CONDUCTIVITY\n")
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f.write("{:.13G}\n".format(TC_in_WmK))
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f.write("*EXPANSION\n")
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f.write("{:.13G}\n".format(TEC_in_mmK))
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f.write("*SPECIFIC HEAT\n")
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f.write("{:.13G}\n".format(SH_in_JkgK))
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elif mat_obj.Category == "Fluid":
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f.write("*FLUID CONSTANTS\n")
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f.write("{:.13G},{:.13G}\n".format(SH_in_JkgK, DV_in_tmms))
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# nonlinear material properties
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if ccxwriter.solver_obj.MaterialNonlinearity == "nonlinear":
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for nlfemobj in ccxwriter.member.mats_nonlinear:
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# femobj --> dict, FreeCAD document object is nlfemobj["Object"]
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nl_mat_obj = nlfemobj["Object"]
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if nl_mat_obj.LinearBaseMaterial == mat_obj:
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if nl_mat_obj.MaterialModelNonlinearity == "simple hardening":
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f.write("*PLASTIC\n")
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for yield_point in nl_mat_obj.YieldPoints:
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f.write("{}\n".format(yield_point))
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f.write("\n")
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