Source code for felupe.mechanics._solidbody_pressure

# -*- coding: utf-8 -*-
"""
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|    ___||    ___||   |    |  | |  ||    _  ||    ___|
|   |___ |   |___ |   |    |  |_|  ||   |_| ||   |___ 
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|   |    |   |___ |       ||       ||   |    |   |___ 
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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/>.

"""

from .._assembly import IntegralFormMixed
from ..constitution import AreaChange
from ._helpers import Assemble, Results


[docs]class SolidBodyPressure: "A hydrostatic pressure boundary on a SolidBody." def __init__(self, field, pressure=None): self.field = field self._normals = self.field.region.normals self.results = Results() self.results.kinematics = self._extract(self.field) if pressure is not None: self.results.pressure = pressure else: self.results.pressure = 0 self.assemble = Assemble(vector=self._vector, matrix=self._matrix) self._area_change = AreaChange()
[docs] def update(self, pressure): self.__init__(self.field, pressure)
def _extract(self, field): self.field = field self.results.kinematics = self.field.extract() return self.results.kinematics def _vector(self, field=None, pressure=None, parallel=False, resize=None): if field is not None: self._update(field) self.results.kinematics = self._extract(self.field) fun = self._area_change.function( self.results.kinematics, self._normals, parallel=parallel, ) if pressure is not None: self.results.pressure = pressure fun[0] *= self.results.pressure self.results.force = IntegralFormMixed( fun=fun, v=self.field, dV=self.field.region.dV, grad_v=[False] ).assemble(parallel=parallel) if resize is not None: self.results.force.resize(*resize.shape) return self.results.force def _matrix(self, field=None, pressure=None, parallel=False, resize=None): if field is not None: self._update(field) self.results.kinematics = self._extract(self.field) fun = self._area_change.gradient( self.results.kinematics, self._normals, parallel=parallel, ) if pressure is not None: self.results.pressure = pressure fun[0] *= self.results.pressure self.results.stiffness = IntegralFormMixed( fun=fun, v=self.field, u=self.field, dV=self.field.region.dV, grad_v=[False], grad_u=[True], ).assemble(parallel=parallel) if resize is not None: self.results.stiffness.resize(*resize.shape) return self.results.stiffness def _update(self, other_field, field=None): if field is not None: self.field = field self.field[0].values = other_field[0].values self.results.kinematics = self._extract(self.field) return self.field