期刊
COMPUTERS & STRUCTURES
卷 118, 期 -, 页码 100-108出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2012.10.002
关键词
Constitutive model; Evolutionary computing; Finite element method; Stiffness matrix; ERR
In this paper a novel approach based on evolutionary polynomial regression (EPR) is presented to develop constitutive models of materials. Stress-strain data are used to train EPR and develop EPR-based material models. It is shown that it is possible to construct the material stiffness (Jacobian) matrix using partial derivatives of the developed EPR models. The EPR-based Jacobian matrix is implemented in finite element (FE) model and two boundary value problems are used to verify the proposed EPR-based FE methodology. It is shown that the EPR-FE model can be successfully employed to analyse structural problems with both linear and non-linear material behaviour. (C) 2012 Elsevier Ltd. All rights reserved.
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