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Ultrasonic Nondestructive Testing of Materials Theoretical Foundations

Ultrasonic Nondestructive Testing of Materials Theoretical Foundations

Ultrasonic Nondestructive Testing of Materials: Theoretical Foundations explores the mathematical foundations and emerging applications of this testing process which is based on elastic wave propagation in isotropic and anisotropic solids. In covering ultrasonic nondestructive testing methods the book emphasizes the engineering point of view yet it relies on the physics and mathematics aspects involved in elastic wave propagation theory. As a result this resource becomes a missing link in the literature by combining coverage of the theoretical aspects of testing and providing intuitive assessments of numerous standard problems to illustrate fundamental assertions. Content includes a brief description of the theory of acoustic and electromagnetic fields to underline the similarities and differences as compared to elastodynamics. It also covers vector algebra and analysis elastic plane and Rayleigh surface waves and ultrasonic beams as well as transducer radiation inverse scattering and ultrasonic nondestructive imaging. Includes numerical computations to explain wave propagation phenomena and compare results of analytical formulations Although ultrasonic nondestructive testing can often be roughly understood in terms of plane waves and beams this book addresses the key issues of transducer radiation and defect scattering and imaging respectively. The authors physically formulate point source synthesis and in mathematical terms they use representation integrals with Green functions always including intuitive interpretations with mathematical evaluations. Replacing cumbersome index notation with a coordinate-free version this reference offers step-by-step documentation of relevant tensorial elastodynamic cases involving isotropic and anisotropic materials. It provides all necessary mathematical tools readers require to understand the mathematical and physical basis for ultrasonic nondestructive testing. | Ultrasonic Nondestructive Testing of Materials Theoretical Foundations

GBP 94.99
1

Mechanics of Elastic Waves and Ultrasonic Nondestructive Evaluation

Mechanics of Elastic Waves and Ultrasonic Nondestructive Evaluation

Summary:This book presents necessary background knowledge on mechanics to understand and analyze elastic wave propagation in solids and fluids. This knowledge is necessary for elastic wave propagation modeling and for interpreting experimental data generated during ultrasonic nondestructive testing and evaluation (NDT&E). The book covers both linear and nonlinear analyses of ultrasonic NDT&E techniques. The materials presented here also include some exercise problems and solution manual. Therefore this book can serve as a textbook or reference book for a graduate level course on elastic waves and/or ultrasonic nondestructive evaluation. It will be also useful for instructors who are interested in designing short courses on elastic wave propagation in solids or NDT&E. The materials covered in the first two chapters provide the fundamental knowledge on linear mechanics of deformable solids while Chapter 4 covers nonlinear mechanics. Thus both linear and nonlinear ultrasonic techniques are covered here. Nonlinear ultrasonic techniques are becoming more popular in recent years for detecting very small defects and damages. However this topic is hardly covered in currently available textbooks. Researchers mostly rely on published research papers and research monographs to learn about nonlinear ultrasonic techniques. Chapter 3 describes elastic wave propagation modeling techniques using DPSM. Chapter 5 is dedicated to an important and very active research field – acoustic source localization – that is essential for structural health monitoring and for localizing crack and other type of damage initiation regions. Features• Introduces Linear and Nonlinear ultrasonic techniques in a single book. • Commences with basic definitions of displacement displacement gradient traction and stress. • Provides step by step derivations of fundamental equations of mechanics as well as linear and nonlinear wave propagation analysis. • Discusses basic theory in addition to providing detailed NDE applications. • Provides extensive example and exercise problems along with an extensive solutions manual. | Mechanics of Elastic Waves and Ultrasonic Nondestructive Evaluation

GBP 120.00
1

EMZ Ultrasonic Pest Repeller, Against Rodents, Indoor, 30 M , 3 W

EMZ Ultrasonic Pest Repeller, Against Rodents, Indoor, 30 M , 3 W

Ultrasonic pest repeller, against rodents, indoor, 30 m, 3 W. Supplied = assembled. Power = 1, 5 watt. Mains voltage = 230 V. Height = 100 mm. Width = 185 mm. Depth = 240 mm. Weight = 0.59 kg. Housing colour = white, black. Product type = pest exterminators. Emits sustained high frequency waves from two loudspeakers. The powerful rodent repeller is inaudible to humans. Ideal for use in rooms up to 30 m. For use against rats, mice and other rodents. Free from toxic substances and easy to use. Repelling mice and other rodents with ultrasound spares you the unpleasant task of catching of killing them. The ultrasonic rodent repeller is easy to set up and activate. The device immediately starts emitting high frequency waves, driving the uninvited guests away. The ultrasonic rodent repeller is the easiest way to get rid of rodents. The device only requires a little power, keeping operating costs extremely low. The use of ultrasound against mice is becoming more and more popular because it provides a sustained solution. The economical ultrasonic rat and mouse repellent can be used on a continual basis as it is not dangerous to humans or pets. The device can be plugged directly into the socket, and features an LED light that indicates it is operating correctly. Rodents will not be harmed by the ultrasonic mouse repeller, but will still be effectively disturbed. The device can simply be placed in the room affected and be activated. The ultrasonic mouse repeller will then start to do exactly what it was designed to do: drive away mice, rats and other rodents. Mains operation.

GBP 119.99
1