Source code for felupe.tools._save

# -*- coding: utf-8 -*-
"""
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This file is part of felupe.

Felupe is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Felupe 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with Felupe.  If not, see <http://www.gnu.org/licenses/>.

"""

import numpy as np

from ..math import det, dot, eigvalsh, transpose
from . import topoints


[docs]def save( region, fields, r=None, gradient=None, converged=True, filename="result.vtk", cell_data=None, point_data=None, ): u = fields.fields[0] mesh = region.mesh offsets = fields.offsets if point_data is None: point_data = {} point_data["Displacements"] = u.values if r is not None: reactionforces = np.split(r, offsets)[0] point_data["ReactionForce"] = reactionforces.reshape(*u.values.shape) if gradient is not None: # 1st Piola Kirchhoff stress F = fields.extract()[0] P = gradient[0] # cauchy stress at integration points s = dot(P, transpose(F)) / det(F) sp = np.sort(eigvalsh(s), axis=0) # shift stresses to points and average nodal values cauchy = topoints(s, region=region, sym=True) cauchyprinc = [topoints(sp_i, region=region, mode="scalar") for sp_i in sp] point_data["CauchyStress"] = cauchy point_data["MaxPrincipalCauchyStress"] = cauchyprinc[2] point_data["IntPrincipalCauchyStress"] = cauchyprinc[1] point_data["MinPrincipalCauchyStress"] = cauchyprinc[0] point_data["MaxPrincipalShearCauchyStress"] = cauchyprinc[2] - cauchyprinc[0] import meshio mesh = meshio.Mesh( points=mesh.points, cells=[ (mesh.cell_type, mesh.cells), ], point_data=point_data, cell_data=cell_data, ) mesh.write(filename)