Internal Damage Detection in a Laminated Composite Plate Using Ultrasonic Guided Waves

Lissenden, Cliff J.; Yan, Fei; Hauck, Eric T.; Noga, Dawn M.; Rose, Joseph L.

doi:10.1063/1.2718080

Cited by 3 publications

(1 citation statement)

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“…One promising time-domain DI is based on the Pearson correlation coefficient and is called the signal difference coefficient (SDC). The SDC is proven to be capable of early detection of fatigue damage in composite plates [53] or identification of small simulated corrosion defects on an aircraft wing made of traditional isotropic material [50].…”

Section: Introductionmentioning

confidence: 99%

A novel damage index for damage identification using guided waves with application in laminated composites

Torkamani

Roy

Barkey

et al. 2014

Smart Mater. Struct.

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In the current investigation, an innovative time-domain damage index is introduced for the first time which is based on local statistical features of the waveform. This damage index is called the ‘normalized correlation moment’ (NCM) and is composed of the nth moment of the cross-correlation of the baseline and comparison waves. The performance of this novel damage index is compared for some synthetic signals with that of an existing damage index based on the Pearson correlation coefficient (signal difference coefficient, SDC). The proposed damage index is shown to have significant advantages over the SDC, including sensitivity to the attenuation of the signal and lower sensitivity to the signal’s noise level. Numerical simulations using Abaqus finite element (FE) software show that this novel damage index is not only capable of detecting the delamination type of damage, but also exhibits a good ability in the assessment of this type of damage in laminated composite structures. The NCM damage index is also validated using experimental data for identification of delamination in composites.

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Section: Introductionmentioning

confidence: 99%