# -*- coding: utf-8 -*-
# ---------------------------------------------------------------------
#
# _____ _ _ _
# | ____|__| | ___| |_ _____(_)___ ___
# | _| / _` |/ _ \ \ \ /\ / / _ \ / __/ __|
# | |__| (_| | __/ |\ V V / __/ \__ \__ \
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# |_| |_|\___||___/_| |_|_| |_| \___|\___|
#
#
# Unit of Strength of Materials and Structural Analysis
# University of Innsbruck,
#
# Research Group for Computational Mechanics of Materials
# Institute of Structural Engineering, BOKU University, Vienna
#
# 2023 - today
#
# Matthias Neuner | matthias.neuner@boku.ac.at
# Thomas Mader | thomas.mader@bokut.ac.at
#
# This file is part of EdelweissMeshfree.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# The full text of the license can be found in the file LICENSE.md at
# the top level directory of EdelweissMeshfree.
# ---------------------------------------------------------------------
from abc import abstractmethod
from edelweissfe.numerics.dofmanager import DofVector
from edelweissfe.stepactions.base.stepactionbase import StepActionBase
from edelweissfe.timesteppers.timestep import TimeStep
from edelweissmeshfree.numerics.dofmanager import DofManager
[docs]
class ArcLengthControllerBase(StepActionBase):
[docs]
@abstractmethod
def computeDDLambda(
self, dU: DofVector, ddU_0: DofVector, ddU_f: DofVector, timeStep: TimeStep, dofManager: DofManager
) -> float:
"""This method is response for compute the correction to dLamba, i.e., the increment of the arc length parameter.
Parameters
----------
dU
The current increment of the solution.
ddU_0
The current dead increment of the solution.
ddU_f
The current reference increment of the solution.
timeStep
The current time increment.
dofManager
The DofManager instance.
Returns
-------
float
The correction ddLambda to dLambda.
"""