Journal ArticleDOI
Ultrasonic classification of imperfect interfaces
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TLDR
In this paper, it is shown that the ratio between the normal and transverse interfacial stiffnesses can be used to classify the interface imperfections, e.g., kissing, partial, and slip bonds.Abstract:
Ultrasonic reflection measurements from material interfaces are commonly used to detect and quantitatively characterize boundary imperfections of different kinds. Either shear or longitudinal waves can be used to assess the degree of the interface imperfection in acoustical terms. On the other hand, the evaluation of this data in terms of strength-related mechanical properties requiresa priori knowledge of the physical nature of the imperfection. It is shown in this paper that the ratio between the normal and transverse interfacial stiffnesses can be used to classify the interface imperfection. This ratio is readily measured, e.g., by comparing the longitudinal and shear reflection coefficients at normal incidence. Both theoretical and experimental results indicate that different types of imperfections, such as kissing, partial, and slip bonds, can be distinguished by this simple technique.read more
Citations
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Journal ArticleDOI
Nonlinear ultrasonic techniques for nondestructive assessment of micro damage in material: A review
TL;DR: In this paper, the authors reviewed the overall progress in nonlinear ultrasonic technique with the brief introduction of basic principle in the application of each nonlinear Ultrasonic phenomenon, including higher harmonic generation, subharmonic generation, nonlinear resonance, or mixed frequency response.
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Equivalent medium representation of fractured rock
TL;DR: In this article, a similarity may be found between various approaches for determining the effects of parallel fractures or aligned cracks on seismic wave propagation at wavelengths that are long compared with the scale length of the cracks.
Journal ArticleDOI
Ultrasonic spectroscopy of imperfect contact interfaces between a layer and two solids
TL;DR: In this article, the effect of interfacial stiffness is isolated by considering the ultrasonic wave interaction with a solid layer compressed between two substrates of the same material, and it is shown that in the high-interfacial-stiffness limit the resonance minima positions are given by the condition h=λ/4+nλ/2, n=0,1,2,…
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Nondestructive testing of adhesively-bonded joints
TL;DR: In this paper, typical defects found in adhesive joints are described together with their significance, and the limits and likely success of current physical nondestructive tests are described, and future trends outlined.
Journal ArticleDOI
Transverse and normal interfacial stiffness of solids with randomly rough surfaces
TL;DR: The theoretical predictions for K(perpendicular) and the transverse stiffness K(parallel) of the interface between two contacting isotropic solids with randomly rough surfaces and Poisson ratio ν agree well with the simulations.
References
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Journal ArticleDOI
The Determination of the Elastic Field of an Ellipsoidal Inclusion, and Related Problems
TL;DR: In this paper, it is shown that to answer several questions of physical or engineering interest, it is necessary to know only the relatively simple elastic field inside the ellipsoid.
Book
The stress analysis of cracks handbook
TL;DR: The Stress Analysis of Cracks Handbook as mentioned in this paper provides a comprehensive, easy-to-access collection of elastic stress solutions for crack configurations, along with other relevant information, such as displacements, crack opening areas, basic stress functions source references, accuracy of solutions, and more.
BookDOI
Review of Progress in Quantitative Nondestructive Evaluation
TL;DR: The Review of Progress in Quantitative NDE (ROPQN) as mentioned in this paper is the world's leading conference in reporting annually new research and development results in quantitative NDE and promotes communication between the research and engineering communities and emphasize current reporting of work in progress.
Journal ArticleDOI
Elastic wave behavior across linear slip interfaces
TL;DR: In this article, a model for an imperfectly bonded interface between two elastic media is proposed, where displacement discontinuity, or slip, is taken to be linearly related to the stress traction which is continuous across the interface.
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