Matrix damage detection in laminated composite structures by Discrete Wavelet Transform

Autores

  • Albert Willian Faria Universidade Federal do Triângulo Mineiro
  • Rodrigo Alves e Silva Queen's University
  • Edson Hideki Koroishi Universidade Tecnológica Federal do Paraná

DOI:

https://doi.org/10.4025/actascitechnol.v41i1.39046

Palavras-chave:

wavelet analysis, cracked composite plates, FSDT, Finite Element Method.

Resumo

The present paper seeks to enhance the potential damage detention and location of the discrete wavelet transform (DWT) in a thin laminated composite damaged by a signal derived from vibration modes. The DWT-1D is used to spatially identify (x-y plane) the damage location. The matrix damage level occurs during the impulsive load application over the analyzed structure. The finite element used is a Serendipity-type element with a rectangular shape, eight nodes and five mechanical degrees-of-freedom per node, and is formulated by First-order shear Deformation Theory (FSDT). The dynamic equation of motion including internal damage is solved by the Newmark implicit integration method, considering small deformations. The results have demonstrated that discrete mother wavelets applied in dynamic modal signal processing are capable of detecting a small damage magnitude in the matrix level. The wavelet coefficients reached great amplitudes in the damaged area.

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Biografia do Autor

Albert Willian Faria, Universidade Federal do Triângulo Mineiro

Departamento de Engenharia Civil. 

Mecânica dos Sólidos e Vibrações.

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Publicado

2019-07-04

Como Citar

Faria, A. W., Silva, R. A. e, & Koroishi, E. H. (2019). Matrix damage detection in laminated composite structures by Discrete Wavelet Transform. Acta Scientiarum. Technology, 41(1), e39046. https://doi.org/10.4025/actascitechnol.v41i1.39046

Edição

Seção

Informação Tecnológica