Journal ArticleDOI
Genetic algorithm based reconstruction of the elastic moduli of orthotropic plates using an ultrasonic guided wave single-transmitter-multiple-receiver SHM array
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In this article, a single-transmitter-multiple-receiver (STMR) compact structural health monitoring (SHM) array is used to reconstruct the elastic moduli of orthotropic plate structures.Abstract:
The reconstruction of all nine unknown elastic moduli of orthotropic plate structures has been achieved using a single-transmitter-multiple-receiver (STMR) compact structural health monitoring (SHM) array. This method uses the velocity measurement of the fundamental guided Lamb wave modes (S0 and A0), generated from a central transmitter, and received by a sparse array of receivers that encircle the transmitter. The measured velocities are then used in an inversion algorithm based on genetic algorithms. A prototype compact STMR array was developed and used in the measurement. Simulated data were used to demonstrate the feasibility of the technique. Experiments were conducted on 3.15 mm graphite–epoxy composite plate using a PZT based STMR array as well as laser vibrometer based displacement measurement. Experimental Lamb wave velocity data were used to validate the present technique. This technique finds application in the areas of material characterization and SHM of anisotropic plate-like structures used in aerospace and automobile components made using fiber reinforced composites.read more
Citations
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Journal ArticleDOI
Location Identification of Closed Crack Based on Duffing Oscillator Transient Transition
TL;DR: In this article, the authors proposed a location identification method for the closed micro-crack in plates based on the quantitative measurement of Duffing oscillator transient transfer in the phase space.
Journal ArticleDOI
Inverse characterization of composites using guided waves and convolutional neural networks with dual-branch feature fusion
TL;DR: In this paper, ultrasonic guided waves and a dual-branch version of convolutional neural networks are used to solve two different but related inverse problems, i.e., finding layup sequence type and...
Journal ArticleDOI
Elastic parameters characterization of multilayered structures by air-coupled ultrasonic transmission and genetic algorithm
TL;DR: In this paper , a non-contact method to characterize isotropic and anisotropic planar multilayer structures using a genetic algorithm is described, based on the determination of critical angles, where the maxima of the modulus of transmission coefficient of the structure appear, and which correspond to the generation of guided waves.
Journal ArticleDOI
Ultrasonic transmission measurements in the characterization of viscoelasticity utilizing polymeric waveguides
Fabian Bause,Jens Rautenberg,Nadine Feldmann,Manuel Webersen,Leander Claes,Hauke Gravenkamp,Bernd Henning +6 more
TL;DR: In this article, a measurement method is presented which quantifies, for a given polymeric material sample, a complex-valued and frequency-dependent material model, and an estimate of the measurement uncertainty of each identified material parameter is calculated.
Book ChapterDOI
Deep Learning Based Identification of Elastic Properties Using Ultrasonic Guided Waves
TL;DR: In this paper, the propagation of guided waves in a composite laminate is modelled using a reduced order Spectral Finite Element Method (SFEM), and deep regression-based networks like, 1D-Convnets and LSTMs are used to map input space to target space.
References
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A summary review of wireless sensors and sensor networks for structural health monitoring
Jerome P. Lynch,Kenneth J. Loh +1 more
TL;DR: This paper is intended to serve as a summary review of the collective experience the structural engineering community has gained from the use of wireless sensors and sensor networks for monitoring structural performance and health.
Journal ArticleDOI
Tuned Lamb-Wave Excitation and Detection with Piezoelectric Wafer Active Sensors for Structural Health Monitoring
TL;DR: In this paper, the capability of embedded piezoelectric wafer active sensors (PWAS) to excite and detect tuned Lamb waves for structural health monitoring is explored.
Journal ArticleDOI
On the determination of phase and group velocities of dispersive waves in solids
Wolfgang Sachse,Yih-Hsing Pao +1 more
TL;DR: In this article, a new technique is developed to determine the dispersion relation and the propagational speeds of waves in dispersive solids, which can be applied to measurements of acoustic or electromagnetic wave speeds in other dispersive media.
Journal ArticleDOI
Detection and monitoring of hidden fatigue crack growth using a built-in piezoelectric sensor/actuator network: I. Diagnostics
Jeong-Beom Ihn,Fu-Kuo Chang +1 more
TL;DR: In this paper, a piezoelectric-based built-in diagnostic technique has been developed for monitoring fatigue crack growth in metallic structures, which consists of three major components: diagnostic signal generation, signal processing and damage interpretation.
Journal ArticleDOI
Structural health monitoring using scanning laser vibrometry: I. Lamb wave sensing
TL;DR: In this article, a non-contact method for low-frequency Lamb wave sensing using a laser Doppler velocimeter is presented, and the results are validated using classical piezoceramic-based sensing and numerical simulations.