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Elastic Constants of Composite Materials by an Inverse Determination Method Based on A Hybrid Genetic Algorithm

Published online by Cambridge University Press:  05 May 2011

S.-F. Hwang ,
J.-C. Wu ,
Evgeny Barkanovs  and
Rimantas Belevicius
S.-F. Hwang*
Affiliation:
Department of Mechanical Engineering, National Yunlin University of Science and Technology, Douliu, Taiwan 64002, R.O.C.
J.-C. Wu*
Affiliation:
Department of Mechanical Engineering, National Yunlin University of Science and Technology, Douliu, Taiwan 64002, R.O.C.
Evgeny Barkanovs*
Affiliation:
Institute of Materials and Structures, Riga Technical University, Kalku St. 1, LV-1658, Riga, Latvia
Rimantas Belevicius*
Affiliation:
Department of Engineering Mechanics, Vilnius Gediminas Technical University, Saulėtekio al. 11, Vilnius 2040, Lithuania
*
*Professor, corresponding author
**Graduate student
***Professo
***Professo
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Abstract

A numerical method combining finite element analysis and a hybrid genetic algorithm is proposed to inversely determine the elastic constants from the vibration testing data. As verified from composite material specimens, the repeatability and accuracy of the proposed inverse determination method are confirmed, and it also proves that the concept of effective elastic constants is workable. Moreover, three different sets of assumptions to reduce the five independent elastic constants to four do not make clear difference on the obtained results by the proposed method. In addition, to obtain robust values of the five elastic constants for a transversely isotropic material, it is recommended to use the out-of-plane Poisson's ratio instead of the out-of-plane shear modulus as the fifth one.

Keywords

Elastic constantComposite materialVibration testHybrid genetic algorithmFinite element analysis.

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Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 3 , September 2010 , pp. 345 - 353
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

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