Guided Waves in Structures for SHM

Ostachowicz, Wiesław; Kudela, Paweł; Krawczuk, Marek; Żak, Arkadiusz

doi:10.1002/9781119965855

Cited by 152 publications

(98 citation statements)

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“…However, in other numerical methods, some of these can be circumvented, e.g. by using the timedomain spectral finite element method as proposed in [18][19][20] where the number of degrees of freedom required is significantly reduced. Recent advances in computational engineering resulted in an interesting work by Paćko et al [21] where a hybrid local interaction simulation approach (LISA)-FE method has been implemented using parallel computing and graphical card processing offering significant time savings when compared to FE.…”

Section: Introductionmentioning

confidence: 99%

Modelling piezoelectric excitation in waveguides using the semi-analytical finite element method

Kalkowski

Rustighi

Waters

2016

Computers & Structures

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In this paper we present a wave-based technique for modelling waveguides equipped with piezoelectric actuators in which there is no need for common simplifications regarding their dynamic behaviour, the interaction with the waveguide or the bonding conditions. The proposed approach is based on the semianalytical finite element (SAFE) method. We developed a new piezoelectric element and employed the analytical wave approach to model the distributed electrical excitation and scattering of the waves at discontinuities. The model was successfully verified numerically and validated against an experiment on a beam-like waveguide with emulated anechoic terminations.

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Section: Introductionmentioning

confidence: 99%

Modelling piezoelectric excitation in waveguides using the semi-analytical finite element method

Kalkowski

Rustighi

Waters

2016

Computers & Structures

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“…What seems especially numerically efficient are their modifications and combinations, see e.g. LISA/SIM (Local Interaction Simulation Approach/ Sharp Interface Model), EFIT (Elasto-dynamic Finite Integration Technique), see [7][8][9][10][11]. Unfortunately, these methods are rather "numerical costly" since they need a great number of numerical operations.…”

Section: Introductionmentioning

confidence: 99%

Development of a Hybrid System for Identification of Elastic Material in Composite Lamina: Application of Lamb Waves and Neural Networks

Waszczyszyn¹,

Nazarko²,

Paćko³

et al. 2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…In the current formulation of a spectral shell finite element the coordinates of the element nodes are defined in the local coordinate system of the element as the roots of the following polynomial expression [14][15][16]:…”

Section: Spectral Finite Element Methodsmentioning

confidence: 99%

Damage detection strategies for aircraft shell–like structures based on propagation guided elastic waves

Żak

Ostachowicz

Krawczuk

2011

J. Phys.: Conf. Ser.

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Damage detection strategies for aircraft shell-like structures based on propagation guided elastic waves Abstract. Damage of aircraft structural elements in any form always present high risks. Failures of these elements can be caused by various reasons including material fatigue or impact leading to damage initiation and growth. Detection of these failures at their earliest stage of development, estimation of their size and location, are one of the most crucial factors for each damage detection method. Structural health monitoring strategies based on propagation of guided elastic waves in structures and wave interaction with damage related discontinuities are very promising tools that offer not only damage detection capabilities, but are also meant to provide precise information about the state of the structures and their remaining lifetime. Because of that various techniques are employed to simulate and mimic the wave-discontinuity interactions. The use of various types of sensors, their networks together with sophisticated contactless measuring techniques are investigated both numerically and experimentally. Certain results of numerical simulations obtained by the use of the spectral finite element method are presented by the authors and related with propagation of guided elastic waves in shell-type aircraft structures. Two types of structures are considered: flat 2D panels with or without stiffeners and 3D shell structures. The applicability of two different damage detection approaches is evaluated in order to detect and localise damage in these structures. Selected results related with the use of laser scanning vibrometry are also presented and discussed by the authors.

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Guided Waves in Structures for SHM

Cited by 152 publications

References 0 publications

Modelling piezoelectric excitation in waveguides using the semi-analytical finite element method

Modelling piezoelectric excitation in waveguides using the semi-analytical finite element method

Development of a Hybrid System for Identification of Elastic Material in Composite Lamina: Application of Lamb Waves and Neural Networks

Damage detection strategies for aircraft shell–like structures based on propagation guided elastic waves

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