Automatic differentiation for stress and consistent tangent computation
Automatic differentiation for stress and consistent tangent computation
复制标题
应力自动微分和一致的正切计算
DOI:
10.1007/s00419-014-0939-6
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发表时间:
2013
影响因子:
2.8
通讯作者:
Hartmann
中科院分区:
文献类型:
--
作者:
Rothe ;Hartmann
In the field of nonlinear finite element analysis, the linearization within the Newton–Raphson and the Multilevel-Newton–Raphson algorithm requires the computation of the stresses and the so-called consistent tangent operator. There are several possibilities for coding the derivatives either by deriving analytical expressions, by using numerical differentiation schemes, or by applying the concept of automatic differentiation. In this article, the three possibilities are compared for three different kinds of constitutive models in order to ascertain particular differences. These models are a finite strain hyperelasticity relation, a more sophisticated finite strain viscoplasticity model, and a small strain von Mises-type thermo-viscoplasticity model. Especially for the last example, it is required to provide a number of tangents to be derived within a monolithic, fully coupled finite element computation. Numerical examples investigate the advantages and disadvantages of analytical, numerical, and automatic differentiation. It is shown that the latter one is a very helpful tool in the developing stage of constitutive modeling.
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DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
S. Hartmann;S. Rothe
通讯作者:
S. Rothe
DOI:
--
发表时间:
2012
期刊:
Software, environments, tools
影响因子:
--
作者:
U. Naumann
通讯作者:
U. Naumann
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
S. Hartmann;K. Quint;Ahmad
通讯作者:
Ahmad
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Ahmad;S. Hartmann
通讯作者:
S. Hartmann
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Torben Netz
通讯作者:
Torben Netz