Journal ArticleDOI
Multi-mode reverse time migration damage imaging using ultrasonic guided waves.
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TLDR
A reverse‐time migration imaging algorithm was combined with a numerical simulator—the three‐dimensional (3D) elastodynamic finite integration technique (EFIT)—to provide multi‐mode damage imaging that enables characterization of damage type and size, general sensitivity to unknown damage types, higher resolution imaging, and detectability regardless of the data acquisition system used.About:
This article is published in Ultrasonics.The article was published on 2019-04-01. It has received 46 citations till now. The article focuses on the topics: Lamb waves.read more
Citations
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Journal ArticleDOI
Environmental and operational conditions effects on Lamb wave based structural health monitoring systems: A review
Rahim Gorgin,Ying Luo,Zhanjun Wu +2 more
TL;DR: A state of the art review of the effects of EOCs parameters including: temperature, moisture, load, vibration and bonding (adhesive layer shear modulus and thickness, bond defects), on Lamb wave propagation is provided.
Journal ArticleDOI
A high-resolution structural health monitoring system based on SH wave piezoelectric transducers phased array.
TL;DR: This work proposes an SH0 wave linear phased array SHM system based on the recently proposed omni-directional SH wave piezoelectric transducer (OSH-PT) and presents the working principle of the phased array system, which is capable of monitoring large structures and can detect multi-defects.
Journal ArticleDOI
Ultrasonic imaging of irregularly shaped notches based on elastic reverse time migration
TL;DR: In this paper, an elastic reverse time migration (ERTM) algorithm is applied to image a branched surface-breaking notch and an embedded stepped notch, showing excellent reconstruction results in both simulations and experiments.
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Impact damage assessment in orthotropic CFRP laminates using nonlinear Lamb wave: Experimental and numerical investigations
TL;DR: In this article, an integrated finite element (FE) model is proposed to further identify the interaction between Lamb wave and impact damages, in which Hashin criterion and triangular cohesive zone model (TCZM) are used to predict the initiation and evolution of delamination and other damages under LVI.
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Generalized dispersive mode decomposition: Algorithm and applications
TL;DR: A generalized dispersive mode decomposition (GDMD) method is proposed to accurately estimate GDs and fully separate overlapped modes of dispersive signals and a high-quality TF distribution can be constructed to clearly reveal the TF pattern of a multimodal dispersive signal.
References
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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.
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Numerical modeling of elastic wave propagation and scattering with EFIT — elastodynamic finite integration technique
TL;DR: In this paper, the basic equations of EFIT, the Elastodynamic Finite Integration Technique, are formulated for anisotropic inhomogeneous media in 3D, and the discrete equations on a staggered grid resulting in a unique way to discretize material parameters, and evaluate stability conditions and consistency for isotropic homogeneous unbounded media.
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Frequency–wavenumber domain filtering for improved damage visualization
TL;DR: This paper presents a technique for the analysis of full wavefield data in the wavenumber/frequency domain as an effective tool for damage detection, visualization and characterization, and its potentials for the inspection of a variety of structural components.
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A boundary element solution for a mode conversion study on the edge reflection of Lamb waves
Younho Cho,Joseph L. Rose +1 more
TL;DR: In this paper, the authors extended the boundary element method to study the mode conversion phenomena of Lamb waves from a free edge and formulated the elastodynamic interior boundary value problem as a hybrid boundary integral equation in conjunction with the normal mode expansion technique based on the Lamb wave dispersion equation.
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Imaging conditions for prestack reverse-time migration
TL;DR: To obtain accurate image amplitudes, source- and receiver-wavefield extrapolations must be able to accurately reconstruct their respective wavefields at the target reflector and have the correct angle dependence, scale factor, and sign and the required (dimensionless) units.
Related Papers (5)
Guided Lamb waves for identification of damage in composite structures: A review
Zhongqing Su,Lin Ye,Ye Lu +2 more