Modelling of attenuation of Lamb waves using Rayleigh damping: Numerical and experimental studies

Ramadas, C.; Balasubramaniam, Krishnan; Hood, Avinash; Joshi, Makarand; Krishnamurthy, C. V.

doi:10.1016/j.compstruct.2011.02.021

Cited by 76 publications

(50 citation statements)

References 17 publications

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“…proposed Rayleigh-damping model [24]. Proportionality constants in Rayleigh damping (a and b) model were expressed in terms of attenuation coefficient (k i or c), group velocity (V g ) and excitation frequency f, as given below:…”

Section: Resultsmentioning

confidence: 99%

Attenuation of Ao Lamb mode in hybrid structural composites with nanofillers

Sreekumar

Ramadas

Anand

et al. 2015

Composite Structures

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Section: Resultsmentioning

confidence: 99%

Attenuation of Ao Lamb mode in hybrid structural composites with nanofillers

Sreekumar

Ramadas

Anand

et al. 2015

Composite Structures

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“…(34) Substituting (37) gives the value of stiffness proportional damping. The relation between α M and β K can be written as (28) : . .…”

Section: (23)mentioning

confidence: 99%

“…If C g is the group velocity of the mode (S, A, and SH modes), then the following expression represents the ToF, C g and distance of travel: If k I (ω) is the attenuation coefficient of the viscoelastic medium, the following equation can be written for obtaining the amplitude ratio (8,28) :…”

Section: (23)mentioning

confidence: 99%

Guided wave propagation in composite laminates using piezoelectric wafer active sensors

Grésil

Giurgiutiu

2013

Aeronaut. j. (1968)

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Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers that enable a large class of structural health monitoring (SHM) applications such as: (a) embedded guided wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays; (b) high-frequency modal sensing, i.e., electro-mechanical impedance method; and (c) passive detection. The focus of this paper is on the challenges posed by using PWAS transducers in the composite laminate structures as different from the metallic structures on which this methodology was initially developed. After a brief introduction, the paper reviews the PWAS-based SHM principles. It follows with a discussion of guided wave propagation in composites and PWAS tuning effects. Then, the mechanical effect is discussed on the integration of piezoelectric wafer inside the laminate using a compression after impact. Experiments were performed on a glass fibre laminate, employing PWAS to measure the attenuation coefficient. Finally, the paper presents some experimental and multi-physics finite element method (MP-FEM) results on guided wave propagation in composite laminate specimens.

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“…The attenuation of Lamb waves is essentially due to the viscoelastic damping properties of composite (24) .…”

Section: Numerical Models Of Temperature Dependent Lamb Wavesmentioning

confidence: 99%

“…In order to simulate the propagation of Lamb waves generated and received by PZTs, numerical simulation was performed with the parameters given in Table 3. (24)(25)(26) showed the parabolic relationship between piezoelectric parameters and temperature. The changing trends are shown as follow: -12 +5 .…”

Section: Numerical Models Of Temperature Dependent Lamb Wavesmentioning

confidence: 99%

Structural health monitoring technology for a full-scale aircraft structure under changing temperature

Gao

Wang

et al. 2014

Aeronaut. j. (1968)

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This paper presents optimal operating modes for the factors to maximise the detection capability of a given SHM technology in service environment. Firstly, an orthogonal experiment was performed to determine the importance ranking of the influence factors. Through the test, it is found that operating temperatures for SHM hardware and excitation frequencies for PZT actuator were the most critical factors. Then, numerical model of Lamb waves generated and received by PZT sensors were presented to predict the distribution of response signal amplitudes under changing temperature. Verification tests were carried out on a glass fibre reinforced composite plate at different temperatures. The comparison between the analytical prediction and test results was presented and temperature-dependent optimal frequencies for PZT actuators were obtained. Finally, SHM experiments of full-scale horizontal composite structures are presented. The detection capability of the SHM technology applications of aircrafts in real world is verified by the experimental results.

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Modelling of attenuation of Lamb waves using Rayleigh damping: Numerical and experimental studies

Cited by 76 publications

References 17 publications

Attenuation of Ao Lamb mode in hybrid structural composites with nanofillers

Attenuation of Ao Lamb mode in hybrid structural composites with nanofillers

Guided wave propagation in composite laminates using piezoelectric wafer active sensors

Structural health monitoring technology for a full-scale aircraft structure under changing temperature

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