Scaling Subtraction Method for Damage Detection in Composite Beams

Loi, Gabriela; Porcu, Maria Cristina; Pieczonka, Łukasz; Staszewski, Wiesław J.; Aymerich, Francesco

doi:10.1016/j.prostr.2020.02.011

Cited by 11 publications

(8 citation statements)

References 16 publications

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“…To address the issues related to the proper selection of the excitation frequency, a series of experimental tests have been conducted in this study to investigate the damage detection capabilities of an SSM technique that makes use of a broadband pulse to excite the structure in place of a stationary harmonic signal. Preliminary tests recently conducted by this approach [24] provided promising indications and suggest further investigations on the efficacy of the pulse excitation strategy. A testing methodology employing an impulsive signal to excite the structure offers the advantage of not requiring the preliminary choice of the frequency of the harmonic excitation, thus eliminating the need for the characterization of the modal response of the structure and overcoming the risk of selecting an interrogating frequency with a low damage detection sensitivity.…”

Section: Scaling Subtraction Methodsmentioning

confidence: 88%

“…Previous investigations by the authors on the application of the SSM technique for damage detection in composite materials showed that the sensitivity of the method depends on the frequency of the harmonic excitation [23,24]. With the latter usually chosen among the resonance frequencies of the system, a preliminary modal analysis for the identification of the natural frequencies of the system is, therefore, needed.…”

Section: Scaling Subtraction Methodsmentioning

confidence: 99%

“…Recently, it was shown that the SSM can be effective in assessing the presence of impact damage in composite laminates [22][23][24]. The sensitivity of the method was found, however, to strongly depend on the excitation frequency.…”

Section: Introductionmentioning

confidence: 99%

“…A first attempt to apply the SSM to detect barely visible impact damage in composite beams excited by impulsive loads was presented in [24]. In that study, an extension of the SSM, based on damage indicators defined in the frequency domain, was proposed.…”

Section: Introductionmentioning

confidence: 99%

“…In that study, an extension of the SSM, based on damage indicators defined in the frequency domain, was proposed. Encouraged by the promising preliminary results found in [24], the present paper aims to carry out a more detailed investigation of the possibility of adopting broadband impulsive excitations and damage indicators based on the analysis of signal magnitudes at selected frequencies, to make the SSM more effective for the detection of low-velocity impact damage in laminated composite materials.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Impact Damage Detection in Composite Beams by Analysis of Non-Linearity under Pulse Excitation

2021

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To detect the presence of damage, many structural health monitoring techniques exploit the nonlinear features that typically affect the otherwise linear dynamic response of structural components with internal defects. One of them is the Scaling Subtraction Method (SSM), which evaluates nonlinear features of the response to a high-amplitude harmonic excitation by subtracting a scaled reference signal. Originally tested on granular materials, the SSM was shown to be effective for composite materials as well. However, the dependence of the technique efficiency on the testing frequency, usually selected among the natural frequencies of the system, may limit its application in practice. This paper investigates the feasibility of applying the SSM through a broadband impulsive excitation, which would avoid the need of a preliminary modal analysis and address the issue of the proper selection of the excitation frequency. A laminated composite beam was tested in intact and damaged conditions under both scaled harmonic excitations of different frequency and broadband impulsive signals of scaled amplitude. Two damage indicators working on the frequency domain were introduced. The results showed a good sensitivity of the SSM to the presence and level of impact damage in composite beams when applied through a broadband impulsive excitation.

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Section: Scaling Subtraction Methodsmentioning

confidence: 88%

Section: Scaling Subtraction Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact Damage Detection in Composite Beams by Analysis of Non-Linearity under Pulse Excitation

2021

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Self-organizing-Map Analysis of InSAR Time Series for the Early Warning of Structural Safety in Urban Areas

Montisci

Porcu

2020

Computational Science and Its Applications – ICCSA 2020

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Among the many causes of collapse of civil structures, those related to the downfall of foundations are crucial for their likely catastrophic consequences. Interferometric synthetic aperture radar (InSAR) techniques may help monitoring the time evolution of ground displacements affecting engineered structures in large urban areas. Artificial neural networks can be exploited to analyze the huge amount of data that is collected over long periods of time on very dense grid of geographical points. The paper presents a neural network-based analysis tool, able to evidence similarities among time series acquired in different points and times. This tool could support an early-warning system, aiming to forecast critical events in urban areas. The implemented procedure is tested on a dataset of InSAR time series recorded over an area of the city of London.

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The Detection of Local Impact Fatigue Damage on Metal Materials by Combining Nonlinear Acoustic Modulation and Coda Wave Interferometry

Ma,

Wu,

et al. 2024

J Nondestruct Eval

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Scaling Subtraction Method for Damage Detection in Composite Beams

Cited by 11 publications

References 16 publications

Impact Damage Detection in Composite Beams by Analysis of Non-Linearity under Pulse Excitation

Impact Damage Detection in Composite Beams by Analysis of Non-Linearity under Pulse Excitation

Self-organizing-Map Analysis of InSAR Time Series for the Early Warning of Structural Safety in Urban Areas

The Detection of Local Impact Fatigue Damage on Metal Materials by Combining Nonlinear Acoustic Modulation and Coda Wave Interferometry

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