Source code for felupe.mechanics._step

# -*- 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/>.

"""

import numpy as np

from ..dof import apply, partition
from ..tools import newtonrhapson


[docs]class Step: """A Step with multiple substeps, subsequently depending on the solution of the previous substep.""" def __init__(self, items, ramp=None, boundaries=None): """A Step with multiple substeps, subsequently depending on the solution of the previous substep.""" self.items = items if ramp is None: self.ramp = {} self.nsubsteps = 1 else: self.ramp = dict(ramp) self.nsubsteps = len(list(self.ramp.values())[0]) if boundaries is None: boundaries = {} self.boundaries = boundaries
[docs] def generate(self, **kwargs): "Generate all substeps." substeps = np.arange(self.nsubsteps) if not "x0" in kwargs.keys(): field = self.items[0].field else: field = kwargs["x0"] stop = False for substep in substeps: if stop: break # update items for item, value in self.ramp.items(): item.update(value[substep]) # update load case dof0, dof1 = partition(field, self.boundaries) ext0 = apply(field, self.boundaries, dof0) # run newton-rhapson iterations res = newtonrhapson( items=self.items, dof0=dof0, dof1=dof1, ext0=ext0, **kwargs, ) if not res.success: stop = True break else: yield res