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Free-vibration analysis and material constants identification of laminated composite sandwich plates / C. R. Lee in Journal of engineering mechanics, Vol. 133 N°8 (Août 2007) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 133 N°8 (Août 2007) . - pp.874–886. Titre : Free-vibration analysis and material constants identification of laminated composite sandwich plates Type de document : texte imprimé Auteurs : C. R. Lee, Auteur ; Kam, T. Y., Auteur ; S. J. Sun, Auteur Année de publication : 2007 Article en page(s) : pp.874–886. Note générale : Applied mechanics Langues : Anglais (eng) Mots-clés : Composite  materials  Sandwich  panels  Plates  Vibration  Laminates Résumé : Free vibration of symmetrically laminated composite sandwich plates with elastic edge restraints is studied via the Rayleigh–Ritz approach. The proposed Rayleigh–Ritz method is constructed on the basis of the layer-wise linear displacement theory. The accuracy of the method in predicting natural frequencies of composite sandwich plates with different boundary conditions is verified by the results reported in the literature or the experimental data obtained in this study. The proposed method is then applied to the material constant identification of free composite sandwich plates using the first six theoretical natural frequencies of the plates. In the identification process, trial material constants are used in the present method to predict the theoretical natural frequencies, a frequency discrepancy function is established to measure the sum of the squared differences between the experimental and theoretical natural frequencies, and a stochastic global minimization algorithm is used to search for the best estimates of the material constants by making the frequency discrepancy function a global minimum. Applications of the material constant identification technique are demonstrated by means of several examples. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A8%2887 [...] [article] Free-vibration analysis and material constants identification of laminated composite sandwich plates [texte imprimé] / C. R. Lee, Auteur ; Kam, T. Y., Auteur ; S. J. Sun, Auteur . - 2007 . - pp.874–886. Applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°8 (Août 2007) . - pp.874–886. Mots-clés : Composite  materials  Sandwich  panels  Plates  Vibration  Laminates Résumé : Free vibration of symmetrically laminated composite sandwich plates with elastic edge restraints is studied via the Rayleigh–Ritz approach. The proposed Rayleigh–Ritz method is constructed on the basis of the layer-wise linear displacement theory. The accuracy of the method in predicting natural frequencies of composite sandwich plates with different boundary conditions is verified by the results reported in the literature or the experimental data obtained in this study. The proposed method is then applied to the material constant identification of free composite sandwich plates using the first six theoretical natural frequencies of the plates. In the identification process, trial material constants are used in the present method to predict the theoretical natural frequencies, a frequency discrepancy function is established to measure the sum of the squared differences between the experimental and theoretical natural frequencies, and a stochastic global minimization algorithm is used to search for the best estimates of the material constants by making the frequency discrepancy function a global minimum. Applications of the material constant identification technique are demonstrated by means of several examples. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282007%29133%3A8%2887 [...]