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
Semi-analytical formulation for the guided waves-based reconstruction of elastic moduli
TL;DR: In this article, an inverse procedure based on the propagation of guided ultrasonic waves is proposed for the characterization of the elastic material constants of plates, which consists of an optimization problem in which the discrepancy between the dispersion curves obtained through a semi analytical finite element (SAFE) formulation and numerical or experimental dispersion curve is minimized.
Journal ArticleDOI
Structural health monitoring of anisotropic plates using ultrasonic guided wave STMR array patches
TL;DR: In this article, two flexible printed circuit board (PCB)-based patches were developed for accomplishing both objectives, i.e. online material characterization (MC) and structural health monitoring (SHM) of anisotropic plate-like structures.
Journal ArticleDOI
Identification of material properties of composite materials using nondestructive vibrational evaluation approaches: A review
TL;DR: A review on the development of nondestructive vibrational evaluation approaches in identifying the elastic constants of composite plates, in experimental and numerical manners, in order to enlighten researchers with the current trends of nonsmooth vibrational approaches is presented in this article.
Journal ArticleDOI
On the computation of dispersion curves for axisymmetric elastic waveguides using the Scaled Boundary Finite Element Method
TL;DR: An algorithm to compute specific parts of the dispersion curves for elastic waveguides based on an axisymmetric representation of the Scaled Boundary Finite Element Method.
Journal ArticleDOI
Genetic algorithms-based inversion of multimode guided waves for cortical bone characterization.
Nicolas Bochud,Quentin Vallet,Yohann Bala,Hélène Follet,Jean-Gabriel Minonzio,Pascal Laugier +5 more
TL;DR: This paper introduces an efficient inversion method based on genetic algorithms using multimode guided waves, in which the mode-order is kept blind, and shows that the model parameters are in good agreement with the reference values derived from x-ray micro-computed tomography.
References
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Journal ArticleDOI
Inversion of leaky Lamb wave data by simplex algorithm
TL;DR: In this article, a numerical procedure is presented for the inversion of leaky Lamb wave (LLW) data to determine certain material properties of a waveguide, using a modified version of the simplex algorithm.
Journal ArticleDOI
Detection of bolt loosening in C–C composite thermal protection panels: I. Diagnostic principle
Jinkyu Yang,Fu-Kuo Chang +1 more
TL;DR: In this article, an attenuation-based diagnostic method was proposed to assess the fastener integrity by observing the attenuation patterns of the resultant sensor signals, which is based on the damping phenomena of ultrasonic waves across the bolted joints.
Book
Manufacturing of composite structures with a built-in network of piezoceramics
Mark Lin,Fu-Kuo Chang +1 more
TL;DR: In this paper, a manufacturing method was developed for integrating a network of distributed piezoceramic actuators/sensors onto laminated carbon/epoxy composite structures.
Journal ArticleDOI
Leaky Lamb waves in an anisotropic plate. I: An exact solution and experiments
Vinay Dayal,Vikram K. Kinra +1 more
TL;DR: In this article, the propagation of leaky Lamb waves in a plate consisting of a general balanced symmetric composite material is considered both analytically as well as experimentally, and an exact solution for the dispersion equation is obtained.
Journal ArticleDOI
Leaky Lamb waves in fibrous composite laminates
Dale E. Chimenti,Adnan H. Nayfeh +1 more
TL;DR: In this paper, results of experimental measurements and theoretical calculations on ultrasonic leaky Lamb-wave propagation in fiber-reinforced, unidirectional composite laminates are presented.