&lt;title&gt;Identifying impact load in composite plates based on distributed piezoelectric sensor measurements&lt;/title&gt;

Tracy, Michael J.; Chang, Fu‐Kuo

doi:10.1117/12.239025

Cited by 20 publications

(18 citation statements)

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“…The response comparator compares the measured sensor signals with the predicted model. An extension of this work is given in Tracy and Chang [114]. Their work is not only applied to beams, but also to composite plates.…”

Section: Passive Sensing Diagnosticsmentioning

confidence: 94%

Smart structure dynamics

Hurlebaus

Gaul

2006

Mechanical Systems and Signal Processing

206

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Section: Passive Sensing Diagnosticsmentioning

confidence: 94%

Smart structure dynamics

Hurlebaus

Gaul

2006

Mechanical Systems and Signal Processing

206

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“…The response comparator compares the measured sensor signals with the predicted model. An extension of this work is shown in [4]; it is not only applied to beams, but also to composite plates. The paper [4] presents a computer code which automatically identi®es the impact load and location.…”

Section: Introductionmentioning

confidence: 97%

“…An extension of this work is shown in [4]; it is not only applied to beams, but also to composite plates. The paper [4] presents a computer code which automatically identi®es the impact load and location. However, for this approach, an exact knowledge of the geometry and material properties of the plate is needed.…”

Section: Introductionmentioning

confidence: 97%

Determination of the impact force on a plate by piezoelectric film sensors

Gaul¹,

Hurlebaus²

1999

Archive of Applied Mechanics (Ingenieur Archiv)

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An experimental method has been developed for detecting impact-generated¯ex-ural waves in plates using piezoelectric ®lms. The recorded signals are analyzed in order to determine the force-time history of the impact. The reconstructed response is compared with the measured response. A good prediction is found. This technique presents a valuable method for identi®cation of source locations and may be applied to in-service structures under impact, to seismic data from earthquakes or to signals recorded from acoustic emission of propagating cracks. IntroductionThe performance of polymer composite parts has been continuously increasing in recent years. The new materials are not only advantageous with regard to new features such as special orientation of ®bers, or thickness of coating, but bring also disadvantages such as new failure modes, among them ± delamination of the composite which is often generated by impacts. Such delaminations lead to the change in the stiffness of the structure that may result in its safety reduction. It is not always possible to identify the structural damage of composites because the structure is often built-in and not accessible for visible inspection. Therefore, it is necessary to monitor the structure, using external load as a parameter. If the determined load is above (or below) a certain value, which has to be obtained with the same material and geometry characteristics, it is possible to predict whether the structure is damaged or not.A direct measurement of, for example, an impact load would require a force cell between the structure and the impactor, an accelerometer attached to the impactor or, ®nally, a measurement of the velocity at the impact location. However, in general, it is not always possible to attach a transducer to the impactor and/or to know the impact location before the impact takes place. Thus, one has to place some sensors at certain points on the structure and measure their response. The determination of the input (impact load) by a given output (sensor signals) and at known system parameters is called the identi®cation problem.Among force-identi®cation problems, paper [1] presents a method for determining the location, magnitude and the phase of a harmonic point-force acting on a simply supported viscoelastic rectangular plate from a number of displacement readings at discrete points on the plate. In [2], a method is presented for determining the location and the load of impacts by applying the phase information from spectral analysis. However, the approach in the paper [2] is restricted to beams only. An impact load-identi®cation technique is suggested in [3] using piezoelectric sensors. The authors used a structure model and a response comparator for solving the inverse problem. The structure model characterizes the relation between the input load and the sensor output. The response comparator compares the measured sensor signals with the predicted model. An extension of this work is shown in [4]; it is not only applied to beams, but also to composite plates...

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“…Therefore these reinforcements are usually applied together with health-monitoring systems, to prevent catastrophic failures. Both traditional (such as strain gauges, piezoelectrics [6]) and innovative monitoring systems (fibre optics, etc. [7,8]), usually make use of sensors that, placed either inside or outside the concrete structure, are invasive, complicated, expensive and, in the case of external sensor, do not allow continuous monitoring throughout structure service life.…”

Section: Introductionmentioning

confidence: 99%

“…Both the internal core and the external part were made of glass fibre- 6 epoxy, nevertheless, electrical conductivity was achieved in the inner core by incorporating carbon nanoparticles within the resin. In particular, the manufactured selfmonitoring composite materials contain, as an alternative, two types of carbon black nanoparticles with different surface areas, OAN and particle size.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon black nanoparticle intrinsic properties on the self-monitoring performance of glass fibre reinforced composite rods

Nanni

Ruscito

Puglia

et al. 2011

Composites Science and Technology

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Effect of carbon black nanoparticle intrinsic properties on the self-monitoring performance of glass fibre reinforced composite rods, Composites Science and Technology (2010), doi: 10.1016/j.compscitech.2010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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<title>Identifying impact load in composite plates based on distributed piezoelectric sensor measurements</title>

Cited by 20 publications

References 1 publication

Smart structure dynamics

Smart structure dynamics

Determination of the impact force on a plate by piezoelectric film sensors

Effect of carbon black nanoparticle intrinsic properties on the self-monitoring performance of glass fibre reinforced composite rods

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