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1 2007

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A system identification approach to material characterisation a new method for visco-elastic characterisation using genetic algorithm

Ozada N., Mares C., Esat I.I., Djakab E.

Advances in Materials Science

2007

Vol. 7, nr 2(12)

264-275

Material behavior is described by constitutive models. These models rely on various physical laws to describe the relationship between same input and output variables. For example stress and strain relationship can be described by a matrix formulation. The elements of matrix are described by various coefficients associated with the material modeled. This is the traditional method and bas worked effectively especially for linear material behavior. Extending such an approach to more complex material behavior requires understanding of material at macro or molecular level. It would be probably impossible for scientist to describe material behavior for every material under every possible condition. Therefore it is necessary to look for alternative methods to describe material behavior. The paper addresses this issue, presents GA as a generic problem solving tool and demonstrate how it can be used as a material characterization tool.