Abstract
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.
Highlights
Advanced composite materials possessing superior mechanical properties are nding increasing applications in dierent industrial sectors such as mechanics, civil, marine aeronautical and aerospace industries
Under excessive environmental and operational conditions, the composite structures may be severely deteriorated in an unexpected manner
Ergy change ratio (MKECR) [24] as a good damage sensitive parameter. This damage indicator was investigated in quantifying the damages of isotropic beam structures with numerical and experimental tests, it is necessary to explore its performance for anisotropic composite beams
Summary
Advanced composite materials possessing superior mechanical properties are nding increasing applications in dierent industrial sectors such as mechanics, civil, marine aeronautical and aerospace industries. Dinh-Cong et al [7] proposed a normalized MSE-based damage index (nMSEBI), an improved version of the MSEBI, to localize possible damage sites in a composite plate structure. It will be certainly desirable to present a damage index that could eectively locate and quantify structural damage simultaneously For this purpose, several methods based sensitivity analysis of dynamic parameters have been developed by some investigators [22]- [24]. Among all of the developed methods, modal kinetic energy change ratio (MKECR), recently proposed by the authors in [24], was taken as a damage sensitive indicator which can indicate both damage positions and corresponding severities. The eects of incomplete mode shapes, various noise levels as well as damage magnitudes on damage detection results are investigated to show how well the proposed method under operational conditions
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
