Ultrasonic Nondestructive Evaluation of Cylindrical Components by Resonance Acoustic Spectroscopy [microform] PDF Download

Author: Ying Fan
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612747081
Category :
Languages : en
Pages :

View

Book Description

Author: Ying Fan
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description
This thesis investigates the potential application of a technique called Material Characterization by Resonance Acoustic Spectroscopy (MCRAS) for the purpose of non-destructive evaluation (NDE) and on-line monitoring of inhomogeneous non-isotropic copper rods produced by the Ohno Continuous Casting (OCC) process. Experimental measurements of the scattered pressure fields are performed on copper samples with different levels of inhomogeneity by using the short-pulse Method of Isolation and Identification of Resonances (MIIR). Two distinct types of resonances have been observed from the experimental results. These resonances are proved to be useful in estimating the average material properties and grain sizes of the copper rods. It is concluded that MCRAS is a potentially powerful technique for non-destructive evaluation and on-line monitoring of inhomogeneous non-isotropic copper rods.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Farhang Honarvar
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

View

Book Description
Potential applications of resonance acoustic spectroscopy (RAS) for the purpose of nondestructive evaluation (NDE) and on-line monitoring of isotropic clad rods and transversely isotropic cylinders are investigated in this thesis. Mathematical models are developed for the scattering of an infinite plane acoustic wave from infinite elastic and viscoelastic clad rods and infinite transversely isotropic cylinders. In these mathematical models, the scattered pressure field is obtained in terms of normal-mode Rayleigh series. Experimental measurements of the scattered pressure fields of various cylindrical components are performed using the short-pulse method of isolation and identification of resonances (MIIR). The method is applied to: copper-clad aluminum rods, Epon-815-clad steel rods, and fiber reinforced composite rods. The experimental results show good consistency with the results obtained from mathematical models. It is concluded that RAS is a potentially powerful technique for nondestructive evaluation and on-line monitoring of various cylindrical components.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Lester W. Schmerr Jr.
Publisher: Springer Science & Business Media
ISBN: 1489901426
Category : Technology & Engineering
Languages : en
Pages : 563

View

Book Description
Ultrasound is currently used in a wide spectrum of applications ranging from medical imaging to metal cutting. This book is about using ultrasound in nondestructive evaluation (NDE) inspections. Ultrasonic NDE uses high-frequency acoustic/elastic waves to evaluate components without affecting their integrity or performance. This technique is commonly used in industry (particularly in aerospace and nuclear power) to inspect safety-critical parts for flaws during in-service use. Other important uses of ultrasonic NDE involve process control functions during manufacturing and fundamental materials characterization studies. It is not difficult to set up an ultrasonic NDE measurement system to launch waves into a component and monitor the waves received from defects, such as cracks, even when those defects are deep within the component. It is difficult however to interpret quantitatively the signals received in such an ultrasonic NDE measurement process. For example based on the ultrasonic signal received from a crack, what is the size, shape, and orientation of the crack producing the signal? Answering such questions requires evaluation procedures based on a detailed knowledge of the physics of the entire ultrasonic measurement process. One approach to obtaining such knowledge is to couple quantitative experiments closely with detailed models of the entire ultrasonic measurement system itself. We refer to such models here as ultrasonic NDE measurement models. In other areas of engineering, models have revolutionized how engineering is practiced. A classic example is the impact of the finite-element method on elastic stress analysis.

Author: Lester W. Schmerr Jr
Publisher: Springer Science & Business Media
ISBN: 0387490639
Category : Technology & Engineering
Languages : en
Pages : 602

View

Book Description
Using a systems level approach, this book employs aspects of linear systems theory and wave propagation and scattering theory to develop a comprehensive model of an entire ultrasonic measurement system. This integrated approach leads to a new model-based engineering technology for designing, using and optimizing ultrasonic nondestructive evaluation inspections. In addition, the book incorporates MATLAB examples and exercises.

Author: Dale W. Fitting
Publisher: Springer
ISBN:
Category : Mathematics
Languages : en
Pages : 376

View

Book Description

Author: Karl-Jörg Langenberg
Publisher: CRC Press
ISBN: 1439855889
Category : Science
Languages : en
Pages : 774

View

Book Description
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.

Author: C. H. Chen
Publisher: World Scientific
ISBN: 9812770941
Category : Medical
Languages : en
Pages : 682

View

Book Description
Ultrasonic methods have been very popular in nondestructive testing and characterization of materials. This book deals with both industrial ultrasound and medical ultrasound. The advantages of ultrasound include flexibility, low cost, in-line operation, and providing data in both signal and image formats for further analysis. The book devotes 11 chapters to ultrasonic methods. However, ultrasonic methods can be much less effective with some applications. So the book also has 14 chapters catering to other or advanced methods for nondestructive testing or material characterization. Topics like structural health monitoring, Terahertz methods, X-ray and thermography methods are presented. Besides different sensors for nondestructive testing, the book places much emphasis on signal/image processing and pattern recognition of the signals acquired.