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ISSN Печать: 1543-1649
ISSN Онлайн: 1940-4352
Indexed in
Calibration of a Nonlinear Elastic Composite With Goal-Oriented Error Control
Краткое описание
In order to determine the parameter values for the constituents of a nonlinear elastic composite on the mesoscale, while experimental data are available on the macroscale only, a meso-macro-transition approach is adopted. A representative volume element (RVE) with piecewise linear Dirichlet boundary conditions, is analyzed using a recently proposed technique for the calibration of constitutive models. The strategy is based on an optimization problem expressed such that the state equation is incorporated via an additional costate field, which has the distinct advantage that error control in an arbitrary goal quantity is formally straightforward. The practical solution of the optimization problem is essentially based on Newton's method, which is feasible since it is possible to decompose each Newton step in a number of linear problems using the conventional finite element structure for the RVE problem. The same problem character is pertinent to the solution of the dual problem for a given choice of error measure, which is the key ingredient in the a posteriori error computation. The numerical results show the effectivity of the error prediction for the special case when the material parameters are constant within the subdomains of mesostructural constituents.
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Johansson Håkan, Runesson Kenneth, Calibration of a class of non-linear viscoelasticity models with sensitivity assessment based on duality, International Journal for Numerical Methods in Engineering, 69, 12, 2007. Crossref
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Johansson Håkan, Runesson Kenneth, Larsson Fredrik, Calibration of a class of non-linear viscoelasticity models with adaptive error control, Computational Mechanics, 41, 1, 2007. Crossref
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Nordström Lars J. L., Johansson Håkan, Larsson Fredrik, A strategy for input estimation with sensitivity analysis, International Journal for Numerical Methods in Engineering, 69, 11, 2007. Crossref
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Johansson Håkan, Larsson Fredrik, Runesson Kenneth, Estimation of model errors in the calibration of viscoelastic material models, International Journal for Numerical Methods in Engineering, 76, 10, 2008. Crossref