In this study an inverse procedure based on stress guided waves is proposed for the characterization of the elastic constants in waveguides. The characterization is carried out via Genetic Algorithms (GA) by minimizing the discrepancy between numerical and experimental group velocity dispersion curves. Numerically, dispersive data are obtained for a set of elastic constants through a semi analytical finite element (SAFE) formulation. In this pilot study, experimental data that can be obtained by post-processing the time-waveforms by means of a time-frequency transforms, are simulated. Results of the procedure applied to an orthotropic composite plate seem to be promising.
A. Marzani, M. Mazzotti, E. Viola, L. De Marchi, N. Speciale, P. Rizzo (2010). A Genetic Algorithm based procedure for the constitutive characterization of composite plates using dispersive guided waves data. LEIDEN : CRC Press/Balkema.
A Genetic Algorithm based procedure for the constitutive characterization of composite plates using dispersive guided waves data
MARZANI, ALESSANDRO;MAZZOTTI, MATTEO;VIOLA, ERASMO;DE MARCHI, LUCA;SPECIALE, NICOLO'ATTILIO;
2010
Abstract
In this study an inverse procedure based on stress guided waves is proposed for the characterization of the elastic constants in waveguides. The characterization is carried out via Genetic Algorithms (GA) by minimizing the discrepancy between numerical and experimental group velocity dispersion curves. Numerically, dispersive data are obtained for a set of elastic constants through a semi analytical finite element (SAFE) formulation. In this pilot study, experimental data that can be obtained by post-processing the time-waveforms by means of a time-frequency transforms, are simulated. Results of the procedure applied to an orthotropic composite plate seem to be promising.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
