Material characterization of composite laminates using dynamic response and real parameter-coded microgenetic algorithm
Liu, G.R. Ma, H.J. Wang, Y.C.
Ma, H.J.
Wang, Y.C.
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Abstract
An efficient nondestructive evaluation procedure is proposed for inversely determining material constants of composite laminates using dynamic response at one point on the plate surface. Material constants of composite laminates are determined by minimizing the difference between the measured dynamic response of the actual plate and the computed response of the plate with assumed material properties. For robust and efficient function minimization, a real parameter-coded microgenetic algorithm (real-μGA) is proposed on the basis of the existing binary coded uniform microgenetic algorithm (uniform μGA). Four different crossover operators are constructed for the real-μGA. Performances of the present real-μGA and the existing uniform μGA are studied using several typical benchmark test functions and an order-3 deceptive function. The present real-μGA is then implemented as the inverse solver in the minimization process of material characterization. From hundreds of tests conducted on the benchmark functions, the order-3 deceptive function, and the material characterization problems, it is found that the real-μGA is two to five times faster in converging to the global optimum compared with the uniform μGA. Numerical examples for material characterization of composite laminates have demonstrated the robustness, efficiency, and accuracy of the proposed procedure. © Springer-Verlag London Limited 2005.
Keywords
Composite laminate, Dynamic, Inverse problem, Material characterization, Nondestructive evaluation, Real parameter-coded microgenetic algorithm
Source Title
Engineering with Computers
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Date
2005-08
DOI
10.1007/s00366-004-0298-y
Type
Article