Multiple damage detection in laminated composite beams by data fusion of Teager energy operator-wavelet transform mode shapes

2020 ◽  
Vol 235 ◽  
pp. 111798 ◽  
Author(s):  
Ganggang Sha ◽  
Maciej Radzienski ◽  
Rohan Soman ◽  
Maosen Cao ◽  
Wieslaw Ostachowicz ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Data Fusion ◽  
Damage Detection ◽  
Laminated Composite ◽  
Energy Operator ◽  
Composite Beams ◽  
Mode Shapes ◽  
Teager Energy Operator ◽  
Teager Energy ◽  
Laminated Composite Beams

scholarly journals Modal Kinetic Energy Change Ratio-based Damage Assessment of Laminated Composite Beams using Noisy and Incomplete Measurements

2019 ◽  
Vol 3 (3) ◽  
pp. 452 ◽  
Author(s):  
Du Dinh-Cong ◽  
Linh Vo-Van ◽  
Dung Nguyen-Quoc ◽  
Trung Nguyen-Thoi
Keyword(s):  
Kinetic Energy ◽  
Damage Detection ◽  
Composite Beam ◽  
Structural Damage ◽  
Laminated Composite ◽  
Composite Beams ◽  
Mode Shapes ◽  
Damage Scenarios ◽  
Creative Commons ◽  
Laminated Composite Beams

Modal kinetic energy (MKE) feature has been mostly employed for optimal sensor layout strategies; nevertheless, little attention is paid to use the feature to the field of structural damage detection. The article presents the extensive applicability of MKE change ratio (MKECR), a good damage sensitive parameter, to damage localization and quantification of laminated composite beams. The formulation of the parameter is based on the closed-form of element MKE sensitivity. The performance of the offered damage detection method is numerically verified by a clamped-clamped composite beam and a two-span continuous composite beam with different hypothetical damage scenarios. The influence of incomplete mode shapes, various noise levels as well as damage magnitudes on damage prediction results are also investigated. The obtained results from these numerical examples indicate that the offered method reliably localize the actually damaged elements and approximately estimate their severities, even under incomplete measurements at a high noise level.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited. 

Damage Detection in Laminated Composite Beams, Plates and Shells Using Dynamic Analysis

2015 ◽  
Vol 787 ◽  
pp. 901-906 ◽  
Author(s):  
G. Mahendran ◽  
Chandrasekaran Kesavan ◽  
S.K. Malhotra
Keyword(s):  
Numerical Analysis ◽  
Composite Structures ◽  
Laminated Composite ◽  
Composite Beams ◽  
Modal Testing ◽  
Mode Shapes ◽  
Rectangular Plates ◽  
Displacement Mode ◽  
Damage Indicator ◽  
Laminated Composite Beams

Vibration-based technique to detect damage in laminated composite beams, rectangular plates and cylindrical shells is presented in this paper.A parameter called damage indicator calculated based on mode shape curvature isused in this studyto detect the location and size of small damages accurately in laminated composite structures. Through numerical analysis of laminated compositecantilevered beam, plate and cylindrical shell models with edge crack as damage, the absolute change inthe damage indicator is localized in the region of damage. Thechange in damage indicatorincreases withincreasing size of damage. Thisinformationis obtained by considering two cases of damage sizes (case-1 and case-2)in the structures. Finite element methodbased commercial analysis package ANSYSis used to obtain thenormalized displacement mode shapesof the three models both for intact and damaged states and then the damage indicator is calculated from the mode shapes data.The numerical analysis to detect damage is followed by validation by experimental modal testing.

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