Characterization of guided-wave propagation in composite plates

Nadella, Kalyan S.; Salas, Ken I.; Cesnik, Carlos E. S.

doi:10.1117/12.847887

Cited by 11 publications

(11 citation statements)

References 10 publications

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“…9 Detailed theoretical study 10 has shown that with a frequency increase, the main radiation lobe periodically alternates either along the upper-ply fibers or in the perpendicular direction. The period of alternation is inversely proportional to the source diameter 2a.…”

Section: Introductionmentioning

confidence: 99%

Frequency dependent directivity of guided waves excited by circular transducers in anisotropic composite plates

Глушков

Glushkova

Eremin

et al. 2012

The Journal of the Acoustical Society of America

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Development of a low frequency shear horizontal piezoelectric transducer for the generation of plane SH waves AIP Conference Proceedings 1706, 030019 (2016) Abstract: Lamb wave propagation in fiber-reinforced composite plates is featured by a pronounced directivity of wave energy transfer along the fibers from a point surface source. In the case of non-point (sized) source, the main lobe of radiation diagram may turn with frequency up to the orthogonal to the fibers direction. This effect has been theoretically studied and physically explained in the context of semi-analytical integral-equation based mathematical model. The present paper gives its experimental verification.

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Section: Introductionmentioning

confidence: 99%

Frequency dependent directivity of guided waves excited by circular transducers in anisotropic composite plates

Глушков

Glushkova

Eremin

et al. 2012

The Journal of the Acoustical Society of America

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“…These are exactly the values of the propagating wavenumbers for the plate. Previous works 6,8,16 have shown the employment of the residue formula to perform the complex integration needed to overcome this difficulty and complete the inversion. The result of the 2-D inversion is the displacement harmonic for the given spatial location and frequency.…”

Section: Iia Theoretical Developmentmentioning

confidence: 99%

“…4 Researchers have used the global matrix method as the basis for a semi-analytical formulation to study the GW excitation and propagation produced by finite-dimensional piezoelectric-based transducers. [5][6][7][8] In the majority of these studies, the goal has been to use a theoretical approach to determine dispersion behavior or out-of-plane displacement values for comparison with experiments using laser vibrometry or other measurement techniques.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Global Matrix/Local Interaction Simulation Approach for Wave Propagation Simulation in Composite Laminates

Obenchain

Nadella

Cesnik

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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This paper presents a hybrid approach to model guided wave propagation in composite laminates. The global matrix approach is used to determine the displacement field surrounding a piezoelectric actuator. The displacement field is then enforced in a specified region of a numerical model that employs the local interaction simulation approach (LISA). This LISA Hybrid approach circumvents the problem of modeling non-rectangular actuators in the Cartesian discretization in LISA by using the global matrix method to characterize the actuator's influence on a cut-out region surrounding it. Results show the LISA Hybrid model outperforms previous LISA models that enforce in-plane displacements on the surface of the plate. The LISA Hybrid model produces wave propagation time histories that closely match the baseline global matrix method and successfully capture directional effects resulting from the anisotropic nature of composite plates. Results for aluminum, cross-ply, unidirectional, and quasi-isotropic plates show dependence on the in-plane discretization size, but that dependence is less pronounced for the cross-ply case.

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“…Given the limited availability in literature, very scarce results can then be found on the analysis and measure of wave attenuation, and wave scattering from damage. To the author's knowledge, only 33,34 have dealt with the problem of wave attenuation in composite plates for SHM purposes. This work presents an assessment of the FE models to correctly predict the wave propagation field.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis of guided waves propagation in composite plates

Carrara

Ruzzene

2013

SPIE Proceedings

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In this paper, we investigate the scattering behavior of defects in composite plates. Scattering coefficients are of great importance for the estimation of wave-damage interaction, for the interpretation of recorded Lamb wave signals, and for the development of novel signal processing strategies. The anisotropy of composite laminates makes modeling of wave propagation and the numerical estimation of scattering coefficients particularly challenging. The paper studies numerical models of wave propagation in composites, and evaluates their predictive ability. These evaluations rely of full wave field measurements on selected composite plate specimens, through which information on dispersion and directionality of propagation are conveniently extracted. In addition, filtering in the frequency-wavenumber domain allows the extraction of scattered wave fields and the estimation of the scattering coefficients. Comparisons between numerical and experimental data highlight modeling challenges, illustrate mesh-driven directional propagation, and suggest an effective strategy for the estimation of the scattering coefficients through tests and FE modeling.

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Characterization of guided-wave propagation in composite plates

Cited by 11 publications

References 10 publications

Frequency dependent directivity of guided waves excited by circular transducers in anisotropic composite plates

Frequency dependent directivity of guided waves excited by circular transducers in anisotropic composite plates

Hybrid Global Matrix/Local Interaction Simulation Approach for Wave Propagation Simulation in Composite Laminates

Numerical and experimental analysis of guided waves propagation in composite plates

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