Guided wave propagation in honeycomb sandwich structures using a piezoelectric actuator/sensor system

Song, Fei; Huang, G. L.; Hudson, Kyle

doi:10.1088/0964-1726/18/12/125007

Cited by 76 publications

(57 citation statements)

References 32 publications

(13 reference statements)

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“…The polyester core is assumed to be isotropic in nature, and the properties used to model the different materials have been listed in Table 1. To get a good convergence of the dynamic solution, the mesh size should have at least 10 elements per wavelength [19,20]. The element size in the current work was 0.3612 mm in the thickness direction, and 0.4662 mm in the length direction.…”

Section: Numerical Modelmentioning

confidence: 99%

Finite element simulation of core inspection in helicopter rotor blades using guided waves

2015

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Section: Numerical Modelmentioning

confidence: 99%

Finite element simulation of core inspection in helicopter rotor blades using guided waves

2015

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“…The continuous wavelet transform (CWT) based on the Gabor wavelets, which has been demonstrated as a useful time-frequency analysis tool of wave signals in structural health monitoring (SHM), 28 is used to obtain the group and phase velocity dispersion curves of the EMM plate. The CWT of a given signal can be mathematically expressed as follows:…”

Section: Determination Of Group Velocitymentioning

confidence: 99%

Microstructural design and experimental validation of elastic metamaterial plates with anisotropic mass density

et al. 2012

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A microstructure design of anisotropic resonant inclusions is investigated for the elastic metamaterial plate with the aid of the numerically-based effective medium model. Experimental validation is then conducted in the anisotropic metamaterial plate through both harmonic and transient wave testing, from which the anisotropic effective dynamic mass density, group and phase velocities are determined as functions of frequency. The strongly anisotropic mass density along two principal orientations is observed experimentally and the prediction from the experimental measurements agrees well with that from the numerical simulation. Finally, based on the numerically obtained effective dynamic properties, a continuum theory is developed to simulate different guided wave modes in the elastic metamaterial plate. Particularly, high-order guided wave coupling and repulsion as well as the preferential energy flow in the anisotropic elastic metamaterial plate are discussed. * glhuang@ualr.edu; phone 1 501 683-7522; fax 1 501 569-8698 2

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“…Different techniques have been proposed, such as traditional Finite Element Method (FEM) (Lissenden et al 2009;Song et al 2009;Ricci et al 2014), semianalytical finite element method (SAFE) (Hayashi et al 2003;Deng and Yang 2011;Rose 2014), finite differences (Saenger and Bohlen 2004;Moczo et al 2007) or applying the elasticity theory using the global matrix and transfer matrix (Wang and Yuan 2007;Karmazin et al 2011Karmazin et al , 2013. Finite Element Methods have limitations due to the available computational resources, since for high frequencies a very fine discretization, both temporal and spatial, is necessary to comply with the Nyquist theorem and to ensure a minimum number of elements per wavelength in order to replicate the wave.…”

Section: Simulationmentioning

confidence: 99%

Damage Sensing in Blades

Crespo

2016

Mare-Wint

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This chapter is divided into three parts; the problem, possible solutions and the chosen option to address the problem, which is my PhD topic within the project MAREWINT. So firstly, the chapter presents an overview of the typical damages that a wind turbine blade can suffer during its life operation. Then, a review of different Structural Health Monitoring (SHM) techniques which are currently being investigated for wind turbine blades is presented. Finally, the chapter provides the state-of-the-art of Guided Wave Technology in composite materials; where different aspects of this SHM technique are explained in more detail. IntroductionWind energy is an important renewable energy source which has gained high relevance during the last decades. Different countries have released plans to invest in wind energy in the future years; such as the USA that will generate 20 % of the country's electricity from wind power by 2030 or Denmark that have set the targets of producing 50 % of the power from the wind by 2020 and also of making Denmark completely free of dependence on fossil fuels by 2050. So, the use of wind power is not expected to decrease within the next decade (Márquez et al. 2012). The trend is to manufacture bigger wind turbines and deploy them offshore. These new wind turbines have around 6 MW power output, 120-metre height tower and 80-metre long blades. They are designed to be operating in rough conditions in difficult-to-reach areas. Therefore, the deployment of Structural Health Monitoring (SHM) techniques becomes essential in order to assess remotely the integrity of the structure. The advantages of using these techniques are many (Schulz and Sundaresan 2006), such as reducing expensive costs for periodic inspections of turbines which are hard to reach, prevention of unnecessary replacement of components based on time of use, or minimizing down time and frequency of sudden breakdowns.

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Guided wave propagation in honeycomb sandwich structures using a piezoelectric actuator/sensor system

Cited by 76 publications

References 32 publications

Finite element simulation of core inspection in helicopter rotor blades using guided waves

Finite element simulation of core inspection in helicopter rotor blades using guided waves

Microstructural design and experimental validation of elastic metamaterial plates with anisotropic mass density

Damage Sensing in Blades

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