Journal ArticleDOI
Ultrasonic scattering from imperfect interfaces: A quasi-static model
Jai-Man Baik,R. Bruce Thompson +1 more
TLDR
In this article, a quasi-static model for ultrasonic transmission and reflection at imperfect interfaces is developed, where the interface is represented by a distributed spring determined by the change in static compliance of the medium with respect to one with a perfect interface, and a distributed mass, representing excess mass at the interface.Abstract:
A quasi-static model for the ultrasonic transmission and reflection at imperfect interfaces is developed. The interface is represented by a distributed spring, determined by the change in static compliance of the medium with respect to one with a perfect interface, and a distributed mass, representing excess mass at the interface. Comparison of the model predictions to exact solutions for two simple cases illustrates its accuracy at low frequencies. The spring stiffnesses can be derived from existing solutions for the elastic displacement of materials containing cracks and inclusions under static load. Results for a variety of cases are reviewed. Applications of the model to study the characteristics of partially contacting surfaces in several problem areas of current interest are discussed.read more
Citations
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Journal ArticleDOI
Image method for measuring normal interfacial stiffness
TL;DR: In this article, a new method for measuring normal interfacial stiffness was proposed by introducing a contact layer, which considers the plastic zone beneath the rough surface, and an image method was proposed for measuring the improved interfacial stiffness.
Proceedings ArticleDOI
Modeling and imaging of multiply generated and scattered tube waves due to multiple hydraulic fractures
Book ChapterDOI
Crack Length Determination by Ultrasonic Methods
TL;DR: In this paper, the authors developed reliable techniques to provide that accurate size determination, which fall into three general categories; (1) determining crack length from signal amplitude measurements, (2) determination of crack lengths from time-of-flight measurements, and (3) determining the crack length using diffracted waves.
Journal ArticleDOI
A superconvergent elastically coupled double beam element for analysis of adhesively bonded lap joints
TL;DR: In this article, a novel elastically coupled double beam (ECDB) finite element with superconvergent properties was developed to primarily study wave propagation in the bonded region of an adhesively bonded single.
Examination of the rate-state friction equations under large perturbations from steady sliding: A theoretical and experimental study.
TL;DR: In this paper, a set of comprehensive studies are presented, both theoretically and with inversion of laboratory data, that in fact all the widely used experimental protocols provide evidence that friction dominantly evolves with slip even when the interface is sliding at the lowest slip rates accessed by these experiments.
References
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Book
Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
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.
Book
Micromechanics of defects in solids
Toshio Mura,D. M. Barnett +1 more
TL;DR: In this paper, the authors present numerical simulation of intergranular and transgranular crack propagation in ferroelectric polycrystals using double kink mechanisms for discrete dislocations in BCCs.
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