Structural health monitoring of composite structures using stress wave methods

Rosalie, Cedric; Chan, Andy; Chiu, Wing Kong; Galea, Steve C; Rose, F. L.; Rajic, Nik

doi:10.1016/j.compstruct.2004.09.016

Cited by 25 publications

(11 citation statements)

References 3 publications

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“…The advantage of this approach compared to other plate-wave imaging systems, e.g. computed tomography [2] and digital beam-forming [3], is that the twodimensional effects of wave-defect interactions are explicitly included in the analytical modeling by means of a convolution integral, rather than the usual approach of applying ray theories borrowed from optics, which imply only a one-dimensional interaction. Numerical studies [4] have shown that this leads to improved detection sensitivity for 1) damages that are comparable in size with the wavelength of the interrogating field and also 2) low-contrast damages.…”

Section: Introductionmentioning

confidence: 99%

P4G-3 An Efficient Measurement Strategy for Plate Wave Diffraction Tomography

Rohde¹,

Veidt²

2007

2007 IEEE Ultrasonics Symposium Proceedings

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This paper reconsiders the implementation details of plate wave diffraction tomography for quantitative nondestructive evaluation of flat isotropic plates. Compared to previous implementations, the approach presented here requires substantially fewer individual wave field measurements, while being also more flexible with respect to the source-receiver configuration geometry. This is achieved 1) by assuming the damage location is known, since this can be efficiently determined using other guided wave techniques and 2) by considering only far-field scatter measurements, which are usually possible if the damage location is already known prior to the imaging. Using numerical simulations of plate wave scattering due to cylindrical damage obstacles of varying size and severity, both the quantitative performance and measurement efficiency of the new implementation strategy are demonstrated.

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Section: Introductionmentioning

confidence: 99%

P4G-3 An Efficient Measurement Strategy for Plate Wave Diffraction Tomography

Rohde¹,

Veidt²

2007

2007 IEEE Ultrasonics Symposium Proceedings

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“…The major limitation of this method is its computational complexity and cost, and it can be acceptable as an offline imaging method. Because of the low computational complexity of ray tomography, it is widely used in many online SHM applications, such as the chemical industry and aviation industry [27]. Ray tomography is a promising method for corrosion monitoring, especially for online applications.…”

Section: Introductionmentioning

confidence: 99%

A Sparse Model of Guided Wave Tomography for Corrosion Mapping in Structure Health Monitoring Applications

Zhang

2019

Applied Sciences

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To improve the reconstruction image spatial resolutions of ultrasonic guided wave ray tomography, a sparse model, based on the differences between the inspected and original slowness of the ultrasonic guided waves propagating in the plate-like or pipe-like materials, is first proposed in this paper. Unlike the conventional ultrasonic guided wave tomography whose reconstruction image resolutions are limited by an underdetermined linear model, analyses show that our new model, although it is also underdetermined, can give the optimal solution of the reconstruction image when the constraints on the sparsity of the slowness difference distribution are valid. The reason for the validation of the sparse constraints on the corrosions of the materials is explained. Based on our new model, a least absolute shrinkage and selection operator (LASSO) approach to do the thickness change mapping of a structure health monitoring (SHM) application is then formulated. Analyses also show that the visible artifacts can be avoided using our method, and the spatial resolutions of reconstruction image by our approach can further be improved by increasing the number of grids in the calculation. The approach is validated by experimental work on an aluminum plate. It is also shown that compared to the conventional ray tomography, the presented method can achieve a relatively high spatial resolution, with good suppression of artifacts.

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“…Tomography is a method that has been used successfully for health monitoring purposes in various industries . It refers to the cross‐sectional imaging of an object from either transmission or reflection data collected by illuminating the object from many different directions .…”

Section: Introductionmentioning

confidence: 99%

Polygonal damage shape reconstruction in plates using guided Lamb wave

Mokhtari

Ohadi

Amindavar

2016

Struct. Control Health Monit.

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Tomographic reconstruction of the damaged region using guided Lamb waves provides important information about the health condition of structures. Two general types of shape reconstruction techniques are discussed before: transform based methods and algebraic iterative methods. There are some limitations associated with each method such as high sensitivity to noise and incomplete data sets, limitations for damage size and contrast, bulky setup for scanning the damaged region, or low speed of reconstruction. In this paper, the concepts of a novel method for reconstructing the contour of damage based on the Polygon Reconstruction Technique are introduced. First, the projections (Radon transform) of the damaged region are generated from a small number of angles with the aid of beamforming method. Then, the damaged region is modeled by a polygon, which its optimal number of vertices is estimated using the minimum description length (MDL) principle. Finally, using the polygon reconstruction technique, the coordinates of the vertices are determined. As the proposed method is at its preliminary stage, two finite element models of an aluminum plate with two different holes as the damage are designed in ABAQUS to examine the feasibility and performance of the method. Results show that the introduced technique based on polygonal damage shape reconstruction is fast and accurate.

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Structural health monitoring of composite structures using stress wave methods

Cited by 25 publications

References 3 publications

P4G-3 An Efficient Measurement Strategy for Plate Wave Diffraction Tomography

P4G-3 An Efficient Measurement Strategy for Plate Wave Diffraction Tomography

A Sparse Model of Guided Wave Tomography for Corrosion Mapping in Structure Health Monitoring Applications

Polygonal damage shape reconstruction in plates using guided Lamb wave

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