Download or read book Ultrasonic Nondestructive Evaluation of Cylindrical Components by Resonance Acoustic Spectroscopy microform written by Ying Fan and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Evaluation of Inhomogeneous Cylindrical Components by Resonance Acoustic Spectroscopy written by Ying Fan and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Nondestructive Evaluation of Cylindrical Components by Resonance Acoustic Spectroscopy written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Evaluation of Cylindrical Components by Resonance Acoustic Spectroscopy written by Farhang Honarvar and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Nondestructive Evaluation of Inhomogeneous Cylindrical Components by Resonance Acoustic Spectroscopy written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals of Ultrasonic Nondestructive Evaluation written by Lester W. Schmerr Jr. and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Ultrasonic Nondestructive Evaluation Systems written by Lester W. Schmerr Jr and published by Springer Science & Business Media. This book was released on 2007-04-22 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Ultrasonic Nondestructive Evaluation written by Tribikram Kundu and published by CRC Press. This book was released on 2003-12-29 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most books on ultrasonic nondestructive evaluation (NDE) focus either on its theoretical background or on advanced applications. Furthermore, information on the most current applications, such as guided wave techniques and acoustic microscopy, is scattered throughout various conference proceedings and journals. No one book has integrated these aspe

Download or read book Ultrasonic Spectral Analysis for Nondestructive Evaluation written by Dale W. Fitting and published by Springer. This book was released on 1981 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resonant Ultrasound Spectroscopy for Quality Control of Geometrically Complex Additively Manufactured Components written by Samantha McGuigan and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal additive manufacturing (AM) has started to overshadow traditional manufacturing practices thanks to its ability to produce complex, high-performance and application-customized components. However, AM process parameters have not been optimized, leading to inconsistencies and imperfections such as cracks and pores in parts, as well as deviations from the original design. Nondestructive evaluation (NDE) methods used for part qualification such as x-ray computed tomography (CT) and conventional ultrasonic testing (UT) have limitations in their abilities. X-ray CT is costly, hazardous, and offers limited resolution for larger components while many UT methods have limited applicability for inspection of parts with complex geometries or rough surfaces. Here, we conduct an integrated numerical and experimental study to investigate the feasibility of resonance ultrasound spectroscopy (RUS) as an alternative NDE method to inspect complex AM lattice structures with a varying number of missing struts. The most encouraging results are obtained when test samples have traction-free boundary conditions. The results of numerical simulations including eigenfrequency and frequency domain analyses are promising, indicating that the pristine and defective lattice samples should theoretically be distinguishable. In addition, given a reference intact sample, characterizing the extent of the defect in terms of the number of missing struts appears feasible. We introduce a similarity metric to compare the spectra after being locally normalized. However, the experimental results are not as conclusive. Although pristine and defective lattices may be distinguished for some cases, the number of missing struts cannot be inferred. The discrepancies between the numerical and experimental results are likely due to our simplified assumptions about material properties in numerical simulations and/or the presence of other unaccounted defects and heterogeneities in test samples.

Download or read book Contact and Noncontact Nonlinear Linear Resonance Ultrasound Spectroscopy N RUS of Additively Manufactured and Wrought 316L Stainless Steel Samples written by Evan Bozek and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing (AM) is becoming increasing popular owing to its ability to manufacture geometrically complex parts and produce customer-designed parts faster than traditional machining. One of the challenges of creating high quality AM parts is that the AM process often produces defects that are difficult to detect. A number of techniques have been used to evaluate the quality of AM parts, such as traditional ultrasonic testing and x-ray micro computed tomography (micro-CT) scans. These methods are not ideal, as traditional ultrasonic testing can require multiple tests to evaluate the entire part, while micro-CT has difficulty detecting small defects in large parts. Resonance-based ultrasonic methods have the advantage of only requiring one testing configuration to evaluate the entire part. Nonlinear resonance ultrasound spectroscopy (NRUS) is a resonance-based nondestructive testing (NDT) technique for material characterization that is especially sensitive to small-scale imperfections such as microscopic cracks. Previous NRUS tests have shown correlations between the parameters measured by NRUS and the fatigue life (fatigue endurance) of a small set of samples, indicating the potential of NRUS for evaluating the build quality of AM parts as related to their performance. However, these measurements on AM metals show large variability due to the experimental setup used. Typical NRUS tests involve bonding the sample to an excitation source that induces vibration in the sample. Unfortunately, the bonding introduces artifacts in the measurements leading to the observed large measurement variability. In this study, we seek to evaluate the use of non-contact excitation sources for NRUS testing with the goal of improving the measurement repeatability. We compare the NRUS measurements using contact and non-contact excitations on wrought and AM 316L stainless steel samples with several different heat treatments. This study suggests the improved repeatability of linear resonance frequency measurements when using an air-coupled transducer. However, the intensity of resulting excitations is not sufficient for NRUS measurements, which require higher excitation voltages. We propose two additional approaches for non-contact NRUS measurements: one using a high-power laser and the other using an air cavity.

Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Emission Testing written by Christian U. Grosse and published by Springer Science & Business Media. This book was released on 2008-07-12 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic Emission (AE) techniques have been studied in civil engineering for a long time. The techniques are recently going to be more and more applied to practical applications and to be standardized in the codes. This is because the increase of aging structures and disastrous damages due to recent earthquakes urgently demand for maintenance and retrofit of civil structures in service for example. It results in the need for the development of advanced and effective inspection techniques. Thus, AE techniques draw a great attention to diagnostic applications and in material testing. The book covers all levels from the description of AE basics for AE beginners (level of a student) to sophisticated AE algorithms and applications to real large-scale structures as well as the observation of the cracking process in laboratory specimen to study fracture processes.

Download or read book Nondestructive Evaluation of Food Quality written by Shyam N. Jha and published by Springer Science & Business Media. This book was released on 2010-11-30 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous works on non-destructive testing of food quality have been reported in the literature. Techniques such as Near InfraRed (NIR) spectroscopy, color and visual spectroscopy, electronic nose and tongue, computer vision (image analysis), ultrasound, x-ray, CT and magnetic resonance imaging are some of the most applied for that purpose and are described in this book. Aspects such as theory/basics of the techniques, practical applications (sampling, experimentation, data analysis) for evaluation of quality attributes of food and some recent works reported in literature are presented and discussed. This book is particularly interesting for new researchers in food quality and serves as an updated state-of-the-art report for those already familiar with the field.

Download or read book Nondestructive Materials Characterization written by Norbert G. H. Meyendorf and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an emphasis on aircraft materials, this book describes techniques for the material characterization to detect and quantify degradation processes such as corrosion and fatigue. It introduces readers to these techniques based on x-ray, ultrasonic, optical and thermal principles and demonstrates the potential of the techniques for a wide variety of applications concerning aircraft materials, especially aluminum and titanium alloys. The advantages and disadvantages of various techniques are evaluated.

Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.

Download or read book Urban Forest Acoustics written by Voichita Bucur and published by Springer Science & Business Media. This book was released on 2007-02-15 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trees can reduce noise by sound reflection and absorption and this is the first book bringing together the widely scattered literature on noise abatement by urban trees. The book will interest those concerned with environmental management, noise control, and urban forestry. It is an invaluable source of information for environmental managers, foresters, acousticians, engineers, architects, scientists, and students.