Experimental Study of Impact-Damage Detection in Composite Laminates using a Cross-Modulation Vibro-Acoustic Technique

Aymerich, Francesco; Staszewski, Wiesław J.

doi:10.1177/1475921710365433

Cited by 114 publications

(72 citation statements)

References 33 publications

(49 reference statements)

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“…Various techniques based on this theory have been developed to detect material imperfections. Examples of application include procedures based on harmonics generation 28,29,30 , frequency mixing 31 , investigations of slow dynamic behavior 32,33 and vibro-acoustic modulation analysis 7,10,18,34,35,36,37 .…”

Section: Nonlinear Acousticsmentioning

confidence: 99%

Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

et al. 2012

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This paper investigates the piezo-based nonlinear vibro-acoustic modulation technique for impact damage detection in composite structures. The method is based on combined low-frequency modal excitation and high-frequency ultrasonic excitation that lead to vibro-acoustic modulations in damaged specimens. The work presented focuses on sensor location analysis. Low-profile, surface bonded piezoceramic transducers are used for ultrasonic and modal excitation.. Modulated responses are acquired using laser vibrometry. Various areas of monitored composite structures are investigated to establish positions exhibiting the largest intensities of vibro-acoustic modulations resulting from impact damage. The study shows that sensor location in composite structures is important for efficient damage detection.

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Section: Nonlinear Acousticsmentioning

confidence: 99%

Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

et al. 2012

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“…The Luxembourg-Gorky effect based method has been applied for detection of thermal cracks in glass [15,16,22,23], impact damage in composite plates [24] and damage in granular media [25]. …”

Section: Luxembourg-gorky Effectmentioning

confidence: 99%

Fatigue crack detection using nonlinear vibro-acoustic cross-modulations based on the Luxemburg-Gorky effect

et al. 2014

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This paper investigates the nonlinear cross-modulation vibro-acoustic technique for fatigue crack detection in metallic structures. The method is used in an aluminium plate instrumented with low-profile piezoceramic transducers that are used for excitation. Laser vibrometry is used to acquire vibro-acoustic responses. The results demonstrate the modulation transfer from one excitation signal to the other excitation signal in the presence of crack in the plate. The work presented focuses on the analysis of modulation intensities. The paper demonstrates that the method can be used for fatigue crack detection in metallic structures.

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“…The drop height of the impactor is prudentially determined (leading to an impact energy of approximately 1.46 J). This level of energy induces BVID including matrix cracking and minor delamination in the current laminate [12], which are indeed not seen on the exterior of the laminate; whereas this amount of energy would not significantly affect the bonding conditions between the PZT wafers and the laminate which may otherwise alter the signal statistics to a great extent and reduce the repeatability of experiment. After the drop testing, the laminate is re-instrumented as described in Section 4.1, leaving all measurement settings untouched.…”

Section: Damaged Conditionmentioning

confidence: 99%

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

Hong

Mao

Todd

et al. 2017

Mechanical Systems and Signal Processing

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a b s t r a c tNonlinear features extracted from Lamb wave signals (e.g., second harmonic generation) are demonstrably sensitive to microscopic damage, such as fatigue and material thermal degradation. While a majority of the existing studies in this context is focused on detecting undersized damage in metallic materials, the present study is aimed at expanding such a detection philosophy to the domain of composites, by linking the relative acoustic nonlinearity parameter (RANP) -a prominent nonlinear signal feature of Lamb waves -to barely visible impact damage (BVID) in composites. Nevertheless, considering immense uncertainties inevitably embedded in acquired signals (due to instrumentation, environment, operation, computation/estimation, etc.) which can adversely obfuscate nonlinear features, it is necessary to quantify the uncertainty of the RANP (i.e., its statistics) in order to enhance decision-making associated with its use as a detection feature. A probabilistic model is established to numerically evaluate the statistical distribution of the RANP. Using piezoelectric wafers, Lamb waves are acquired and processed to produce histograms of RANP estimates in both the healthy and damaged conditions of a CF/EP laminate, to which the model is compared, with good agreement observed between the model-predicted and experimentally-obtained statistic distributions of the RANP. With the model, BVID in the laminate is predicted. The model is further made use of to quantify the level of confidence in damage prediction results based on the concept of a receiver operating characteristic, enabling the practitioners to better understand the obtained results in the presence of uncertainties.

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Experimental Study of Impact-Damage Detection in Composite Laminates using a Cross-Modulation Vibro-Acoustic Technique

Cited by 114 publications

References 33 publications

Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

Fatigue crack detection using nonlinear vibro-acoustic cross-modulations based on the Luxemburg-Gorky effect

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

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