Delamination detection in composite laminate plates using 2D wavelet analysis of modal frequency surface

Chen Yang; S. Olutunde Oyadiji

doi:10.1016/j.compstruc.2016.10.019

Delamination detection in composite laminate plates using 2D wavelet analysis of modal frequency surface

Chen Yang, S. Olutunde Oyadiji^*

^*Corresponding author for this work

The University of Manchester

Research output: Contribution to journal › Article › peer-review

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Abstract

A novel damage detection approach, using modal frequency surface (MFS), is presented. By attaching a point mass at different locations, the MFS is generated. Delamination causes a discontinuity in the MFS due to reduction of local stiffness. Finite element method is employed to simulate the modal frequency data. The frequency deviations show a quasi-exponential decrease as the delamination depth increases. MFS wavelet coefficient is computed and its magnitude under different random noise levels is discussed. It is shown that the MFS wavelet coefficient can characterise the location and shape of both near and far surface delaminations in laminated composite plates.

Original language	English
Pages (from-to)	109-126
Number of pages	18
Journal	Computers and Structures
Volume	179
Early online date	16 Nov 2016
DOIs	https://doi.org/10.1016/j.compstruc.2016.10.019
Publication status	Published - 15 Jan 2017

Keywords

Composite laminate
Continuous wavelet transform
Delaminations detection
Derivatives of Gaussian wavelet
Modal frequency surface

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10.1016/j.compstruc.2016.10.019

Delamination detection in composite laminate plates using 2D wavelet analysis of modal frequency surface (final)Accepted author manuscript, 4.42 MB

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title = "Delamination detection in composite laminate plates using 2D wavelet analysis of modal frequency surface",

abstract = "A novel damage detection approach, using modal frequency surface (MFS), is presented. By attaching a point mass at different locations, the MFS is generated. Delamination causes a discontinuity in the MFS due to reduction of local stiffness. Finite element method is employed to simulate the modal frequency data. The frequency deviations show a quasi-exponential decrease as the delamination depth increases. MFS wavelet coefficient is computed and its magnitude under different random noise levels is discussed. It is shown that the MFS wavelet coefficient can characterise the location and shape of both near and far surface delaminations in laminated composite plates.",

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AU - Yang, Chen

AU - Oyadiji, S. Olutunde

PY - 2017/1/15

Y1 - 2017/1/15

N2 - A novel damage detection approach, using modal frequency surface (MFS), is presented. By attaching a point mass at different locations, the MFS is generated. Delamination causes a discontinuity in the MFS due to reduction of local stiffness. Finite element method is employed to simulate the modal frequency data. The frequency deviations show a quasi-exponential decrease as the delamination depth increases. MFS wavelet coefficient is computed and its magnitude under different random noise levels is discussed. It is shown that the MFS wavelet coefficient can characterise the location and shape of both near and far surface delaminations in laminated composite plates.

AB - A novel damage detection approach, using modal frequency surface (MFS), is presented. By attaching a point mass at different locations, the MFS is generated. Delamination causes a discontinuity in the MFS due to reduction of local stiffness. Finite element method is employed to simulate the modal frequency data. The frequency deviations show a quasi-exponential decrease as the delamination depth increases. MFS wavelet coefficient is computed and its magnitude under different random noise levels is discussed. It is shown that the MFS wavelet coefficient can characterise the location and shape of both near and far surface delaminations in laminated composite plates.

KW - Composite laminate

KW - Continuous wavelet transform

KW - Delaminations detection

KW - Derivatives of Gaussian wavelet

KW - Modal frequency surface

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DO - 10.1016/j.compstruc.2016.10.019

M3 - Article

AN - SCOPUS:84995756395

SN - 0045-7949

VL - 179

SP - 109

EP - 126

JO - Computers and Structures

JF - Computers and Structures

ER -

Delamination detection in composite laminate plates using 2D wavelet analysis of modal frequency surface

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