Determination of the tangent stiffness tensor in materials modeling in case of large deformations by calculation of a directed strain perturbation
Determination of the tangent stiffness tensor in materials modeling in case of large deformations by calculation of a directed strain perturbation
复制标题
通过计算定向应变扰动确定大变形情况下材料建模中的切向刚度张量
DOI:
10.1016/j.cma.2015.11.034
复制
发表时间:
2016
影响因子:
7.2
通讯作者:
E. Werner
中科院分区:
文献类型:
--
作者:
F. Meier;C. Schwarz;E. Werner
The Finite Element Method in the field of materials modeling is often relying to the tangent stiffness tensor of the constitutive law. This so called Jacobian matrix is required at each time increment and describes the local material behavior. It assigns a stress increment to a strain increment and is of fundamental importance for the numerical determination of the equilibrium state. For increasingly sophisticated material models the tangent stiffness tensor can be derived analytically only with great effort, if at all. Numerical methods like the forward-difference, the central-difference, and the complex-step derivative approximation approach are widely used for its calculation. For each of these methods it is necessary to generate a specific strain perturbation. However, in large strain formulations it is not possible to perturb the strain directly but one can only modify the deformation gradient.We present our methods to generate a directed strain perturbation for the Green–Lagrange, Euler–Almansi and logarithmic strain measures as a function of the deformation gradient and compare them with other commonly used methods. An increase in accuracy and rate of convergence can be achieved with the proposed procedures.
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DOI:
10.1002/pamm.201410200
发表时间:
2014
期刊:
PAMM
影响因子:
--
作者:
F. Meier;C. Schwarz;E. Werner
通讯作者:
E. Werner
影响因子:
7.2
作者:
Masato Tanaka;M. Fujikawa;D. Balzani;J. Schröder
通讯作者:
J. Schröder
影响因子:
9.7
作者:
H. Petryk
通讯作者:
H. Petryk
DOI:
10.1016/j.msea.2013.02.067
发表时间:
2013
影响因子:
6.4
作者:
T. Taxer;C. Schwarz;W. Smarsly;E. Werner
通讯作者:
E. Werner
DOI:
10.1115/1.2979872
发表时间:
2008-12
期刊:
Journal of biomechanical engineering
影响因子:
--
作者:
Sun W;Chaikof EL;Levenston ME
通讯作者:
Levenston ME