File size: 4,309 Bytes
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# * Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
__title__ = "FreeCAD FEM calculix write inpfile mesh"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"
import codecs
from os.path import join
from femmesh import meshtools
def write_mesh(ccxwriter):
element_param = 1 # highest element order only
group_param = False # do not write mesh group data
# Use reduced integration beam elements or truss elements if this is enabled in ccx solver settings
vol_variant = "standard"
if ccxwriter.solver_obj.ExcludeBendingStiffness:
edge_variant = "truss"
else:
if ccxwriter.solver_obj.BeamReducedIntegration:
edge_variant = "beam reduced"
else:
edge_variant = "beam"
# Check to see if fluid sections are in analysis and use D network element type
if ccxwriter.member.geos_fluidsection:
edge_variant = "network"
# Use 2D elements if model space is not set to 3D
if ccxwriter.solver_obj.ModelSpace == "3D":
if ccxwriter.solver_obj.ExcludeBendingStiffness:
face_variant = "membrane"
else:
face_variant = "shell"
elif ccxwriter.solver_obj.ModelSpace == "plane stress":
face_variant = "stress"
elif ccxwriter.solver_obj.ModelSpace == "plane strain":
face_variant = "strain"
elif ccxwriter.solver_obj.ModelSpace == "axisymmetric":
face_variant = "axisymmetric"
if ccxwriter.split_inpfile:
write_name = "femesh"
file_name_split = ccxwriter.mesh_name + "_" + write_name + ".inp"
ccxwriter.femmesh_file = join(ccxwriter.dir_name, file_name_split)
ccxwriter.femmesh.writeABAQUS(
ccxwriter.femmesh_file,
element_param,
group_param,
volVariant=vol_variant,
faceVariant=face_variant,
edgeVariant=edge_variant,
)
inpfile = codecs.open(ccxwriter.file_name, "w", encoding="utf-8")
inpfile.write("{}\n".format(59 * "*"))
inpfile.write(f"** {write_name}\n")
inpfile.write(f"*INCLUDE,INPUT={file_name_split}\n")
else:
ccxwriter.femmesh_file = ccxwriter.file_name
ccxwriter.femmesh.writeABAQUS(
ccxwriter.femmesh_file,
element_param,
group_param,
volVariant=vol_variant,
faceVariant=face_variant,
edgeVariant=edge_variant,
)
# reopen file with "append" to add all the rest
inpfile = codecs.open(ccxwriter.femmesh_file, "a", encoding="utf-8")
inpfile.write("\n\n")
return inpfile
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