Identification of mechanical properties of composite lamina using a distributed piezoelectric transducer

Danbi Hong; Jung Kyu Ryou; Sungho Park; Seung Jo Kim

doi:10.1117/12.316331

24 July 1998 Identification of mechanical properties of composite lamina using a distributed piezoelectric transducer

Danbi Hong, Jung Kyu Ryou, Sungho Park, Seung Jo Kim

Proceedings Volume 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures; (1998) https://doi.org/10.1117/12.316331
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

In order to improve the predictions of dynamic behavior in laminated composite structures, several lower vibration modes from experimental results are used to update the mechanical properties followed by the updated frequencies. As an updating process of the natural frequencies, the optimization algorithm based on conjugate gradient method is adopted. The mechanical properties of lamina, E₁, E₂, (nu) ₁₂ and G₁₂, are design parameters for the identification process. The proposed method is applied to predict the dynamic behavior of laminated composite plates of [0]_8T and [+/- 45]_2S separately and interchangeably. Also, the mixed case for [0]_8T and [+/- 45]_2S is examined to check the possibility for the improved prediction generally. The good agreement is obtained between the measured frequencies and the numerical ones. Based on the results for all the cases studied, the proposed approach has a clear potential in characterizing the mechanical properties of composite lamina.

Citation Download Citation

Danbi Hong, Jung Kyu Ryou, Sungho Park, and Seung Jo Kim "Identification of mechanical properties of composite lamina using a distributed piezoelectric transducer", Proc. SPIE 3323, Smart Structures and Materials 1998: Mathematics and Control in Smart Structures, (24 July 1998); https://doi.org/10.1117/12.316331

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