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Development Of A Multi Beam Laser Ultrasonic Inspection System And Its Application On Flaw Sizing
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Book Synopsis Development of a Multi-Beam Laser Ultrasonic Inspection System and Its Application on Flaw Sizing by :
Download or read book Development of a Multi-Beam Laser Ultrasonic Inspection System and Its Application on Flaw Sizing written by and published by Contentsworks Inc.. This book was released on 2006 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Laser Ultrasonic and Interferometric Inspection System for High-volume On-line Inspection of Microelectronic Devices by : Abel Valdes
Download or read book Development of Laser Ultrasonic and Interferometric Inspection System for High-volume On-line Inspection of Microelectronic Devices written by Abel Valdes and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this thesis are to develop and validate laser ultrasonic inspection methods for on-line testing of microelectronic devices. Electronic packaging technologies such as flip chips and BGAs utilize solder bumps as electrical and mechanical connections. Since they are located hidden from view between the device and the substrate, defects such as cracks, voids, misalignments, and missing bumps are difficult to detect using non-destructive methods. Laser ultrasonic inspection is capable of detecting such defects by utilizing a high power laser pulse to induce vibrations in a microelectronic device while measuring the out of plane displacement using an interferometer. Quality can then be assessed by comparing the vibration response of a known-good device to the response of the sample under inspection. The main limitation with the implementation of laser ultrasonic inspection in manufacturing applications is the requirement to establish a known-good reference device utilizing other non-destructive methods. My work will focus on developing a method to inspect flip chip devices without requiring a previously established reference. The method will automatically examine measurement data from a large sample set to identify those devices which are most similar. The selected devices can then be utilized to compose a hybrid reference signal which can be used for comparison and defect detection.
Book Synopsis Fundamentals of Ultrasonic Nondestructive Evaluation by : Lester W. Schmerr Jr.
Download or read book Fundamentals of Ultrasonic Nondestructive Evaluation written by Lester W. Schmerr Jr. and published by Springer. This book was released on 2016-04-30 with total page 765 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively revised and updated second edition of a widely read classic presents the use of ultrasound in nondestructive evaluation (NDE) inspections. Retaining the first edition's use of wave propagation /scattering theory and linear system theory, this volume also adds significant new material including: the introduction of MATLAB® functions and scripts that evaluate key results involving beam propagation and scattering, flaw sizing, and the modeling of ultrasonic systems. elements of Gaussian beam theory and a multi-Gaussian ultrasonic beam model for bulk wave transducers. a new chapter on the connection between ultrasonic modeling and probability of detection (POD) and reliability models. new and improved derivations of ultrasonic measurement models. updated coverage of ultrasonic simulators that have been developed around the world. Students, engineers, and researchers working in the ultrasonic NDE field will find a wealth of information on the modeling of ultrasonic inspections and the fundamental ultrasonic experiments that support those models in this new edition.
Book Synopsis Industrial Ultrasonic Inspection: Levels 1 and 2 by : Ryan Chaplin
Download or read book Industrial Ultrasonic Inspection: Levels 1 and 2 written by Ryan Chaplin and published by FriesenPress. This book was released on 2017-05-16 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic testing (UT) has been an accepted practice of inspection in industrial environments for decades. This book, Industrial Ultrasonic Inspection, is designed to meet and exceed ISO 9712 training requirements for Level 1 and Level 2 certification. The material presented in this book will provide readers with all the basic knowledge of the theory behind elastic wave propagation and its uses with the use of easy to read text and clear pictorial descriptions. Discussed UT concepts include: - General engineering, materials, and components theory - Theory of sound waves and their propagation - The general uses of ultrasonic waves - Comprehensive lab section - Methods of ultrasonic wave generation - Different ultrasonic inspection techniques - Ultrasonic flaw detectors, scanning systems, and probes - Calibration fundamentals - General scanning techniques - Flaw sizing techniques - Basic analysis for ultrasonic, phased array ultrasonic, and time of flight diffraction inspection techniques - Codes and standards - Principles of technical documentation and reporting It is my intention that this book is used for general training purposes. It is the ideal classroom textbook. -Ryan Chaplin
Book Synopsis Ultrasonic Inspection Technology Development and Search Unit Design by : Mark V. Brook
Download or read book Ultrasonic Inspection Technology Development and Search Unit Design written by Mark V. Brook and published by John Wiley & Sons. This book was released on 2012-03-13 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic testing is a relatively new branch of science and industry. The development of ultrasonic testing started in the late 1920s. At the beginning, the fundamentals of this method were borrowed from basic physics, geometrical and wave optics, acoustics and seismology. Later it became clear that some of these theories and calculation methods could not always explain the phenomena observed in many specific cases of ultrasonic testing. Without knowing the nuances of the ultrasonic wave propagation in the test object it is impossible to design effective inspection technique and search units for it realization. This book clarifies the theoretical differences of ultrasonics from the other wave propagation theories presenting both basics of physics in the wave propagation, elementary mathematic and advanced practical applications. Almost every specific technique presented in this book is proofed by actual experimental data and examples of calculations.
Book Synopsis Fully Non-contact Laser Ultrasound System and Methods for Monitoring Metal Additive Manufacturing Process by : Chaitanya Bakre
Download or read book Fully Non-contact Laser Ultrasound System and Methods for Monitoring Metal Additive Manufacturing Process written by Chaitanya Bakre and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research contributes to the development of an in-situ laser ultrasonic inspection system to ensure a defect-free fabrication of additive manufacturing (AM) parts. AM process is hailed as one of the most innovative technologies of industry 4.0. due to the many unique advantages over the subtractive manufacturing methods. The increased design freedom due to the layer-wise manufacturing also allows significant weight reductions and enhanced component performance with little or no specialized tooling. However, the lack of understanding of the process makes it prone to defects inhibiting its use in safety-critical applications such as power generation and aerospace industries. In the absence of defects, subtle changes in the process parameters can lead to undesired microstructure that can be detrimental to the part performance. Thus, in-situ material state monitoring techniques are urgently needed to realize the full benefits of additive manufacturing. The majority of the current process monitoring systems are vision-based, limiting them from monitoring the internal defects, and are incapable of providing information about the mechanical properties. X-ray computed tomography is being used extensively to detect volumetric AM defects, but it is not amenable for in-situ inspections and is limited by size. Thus, laser ultrasound is considered as a viable solution for in-situ monitoring of AM as it is non-contact and offers benefits of ultrasonic testing, such as detecting volumetric defects and estimating strength-related properties. This research presents a laser ultrasonic system integrated into a directed-energy-deposition additive manufacturing system and demonstrates the in-situ detection of realistic AM defects and microstructural sensing. Laser generation of both narrowband and broadband Rayleigh waves is exploited to detect localized defects created by altering the process parameters in Ti-6Al-4V depositions. Furthermore, the nonlinear waveform distortion of broadband Rayleigh waves is used to detect changes instilled by marginally varying the process parameters for Ti-6Al-4V and IN718 depositions. The AM surface roughness is a key challenge for laser ultrasound-based in-situ monitoring because it affects both wave reception and the Rayleigh wave propagation. Results demonstrate the influence of AM surface roughness and unique microstructure on nonlinear distortions of Rayleigh waves. Furthermore, the capability of the laser ultrasonic system to carry out artificial flaw detection using narrowband and broadband Rayleigh waves and microstructure monitoring using nonlinear distortion of broadband Rayleigh waves is demonstrated for Ti-6Al-4V and IN-718 specimens within the directed energy deposition additive manufacturing chamber.
Book Synopsis Ultrasonic Nondestructive Evaluation Systems by : Lester W. Schmerr Jr
Download or read book Ultrasonic Nondestructive Evaluation Systems written by Lester W. Schmerr Jr and published by Springer. This book was released on 2010-11-04 with total page 0 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.
Book Synopsis Development of Ultrasonic Techniques to Establish Flaw Size by : Frank O. Reed
Download or read book Development of Ultrasonic Techniques to Establish Flaw Size written by Frank O. Reed and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Defect Sizing Using Non-destructive Ultrasonic Testing by : Wolf Kleinert
Download or read book Defect Sizing Using Non-destructive Ultrasonic Testing written by Wolf Kleinert and published by Springer. This book was released on 2016-05-06 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a precise approach for defect sizing using ultrasonics. It describes an alternative to the current European and American standards by neglecting their limitations. The approach presented here is not only valid for conventional angle beam probes, but also for phased array angle beam probes. It introduces an improved method which provides a significant productivity gain and calculates curves with high accuracy. Its content is of interest to all those working with distance gain size (DGS) methods or are using distance amplitude correction (DAC) curves.
Book Synopsis Defect Sizing Using Non-destructive Ultrasonic Testing by : Wolf Kleinert
Download or read book Defect Sizing Using Non-destructive Ultrasonic Testing written by Wolf Kleinert and published by Springer. This book was released on 2018-05-27 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a precise approach for defect sizing using ultrasonics. It describes an alternative to the current European and American standards by neglecting their limitations. The approach presented here is not only valid for conventional angle beam probes, but also for phased array angle beam probes. It introduces an improved method which provides a significant productivity gain and calculates curves with high accuracy. Its content is of interest to all those working with distance gain size (DGS) methods or are using distance amplitude correction (DAC) curves.
Download or read book Laser Ultrasonics written by and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-ultrasonics refers to a range of technologies involving the use of laser electrooptical systems both to generate and to detect ultrasonic signals in and on materials and structures. Such systems have been developed to permit classical ultrasonic measurements for materials characterization and defect identification and measurement. From the point of view of one concerned with practical applications of ultrasonic inspection and measurement methods, laser-ultrasonic systems offer the flexibility which, in principle, should permit remote ultrasonic measurements to be performed on objects at elevated temperatures or in hostile environments. Laser-ultrasonic systems can be designed and constructed with extremely wide and flat detection bandwidth so that ultrasonic vibrational displacements can be recorded with high fidelity. In addition, there is no mechanical loading of the surface to damp, absorb, or otherwise distort the propagating acoustic energy. This feature has been used to great advantage in performing ultrasonic measurements in thin plates and films. In spite of the great advantages offered by laser-ultrasonics, there are severe limitations which restrict its application. In fact, based upon the performance of current state-of-the-art laser-ultrasonic systems, it is almost always more advantageous to use conventional ultrasonic transduction methods, if possible for a given application, than it is to apply laser-ultrasonics. In short, the main reason leading to this conclusion is the poor system detection sensitivity of laser-ultrasonic systems compared with piezoelectric transducer systems. The ramifications of this limited sensitivity are many.
Book Synopsis Non-Destructive Testing And Evaluation For Manufacturing And Construction. by : H. Dos Reis
Download or read book Non-Destructive Testing And Evaluation For Manufacturing And Construction. written by H. Dos Reis and published by CRC Press. This book was released on 1989-12-01 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring advances and strengthening communications among researchers in manufacturing and construction technologies, this book covers nondestructive testing and evaluation methods. Drawing on a wide range of experts, it provides insights from every sector of the field. Based on a three-day conference titled "Nondestructive Testing and Evaluation for Manufacturing and Construction" held on the campus of the University of Illinois at Urbana-Champaign, the papers presented in the book foster development of new and innovative methods.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acoustics Abstracts written by and published by . This book was released on 1996 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Health Monitoring Damage Detection Systems for Aerospace by : Markus G. R. Sause
Download or read book Structural Health Monitoring Damage Detection Systems for Aerospace written by Markus G. R. Sause and published by Springer Nature. This book was released on 2021 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.
Book Synopsis Hybrid Non-destructive Technique for Volumetric Defect Analysis and Reconstruction by Remote Laser Induced Ultrasound by : Hossam Selim
Download or read book Hybrid Non-destructive Technique for Volumetric Defect Analysis and Reconstruction by Remote Laser Induced Ultrasound written by Hossam Selim and published by . This book was released on 2020 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This PhD thesis is devoted to the design, development and implementation of a non-contact hybrid non-destructive testing (NDT) method applied to the analysis of metallic objects that contain embedded defects or fractures. We propose a hybrid opto-acoustic technique that combines laser generated ultrasound as exciter and ultrasound transducers as receivers. This work envisages a detailed study of the detection and one, two or three-dimensional reconstruction of defects, using the proposed hybrid technique and its application as a remotely controlled non-contact NDT. Our device combines several advantages of both photonic and ultrasonic techniques, while reduces some of the drawbacks of both individual methods. Our method relay on the combination of experimental results with high-resolution signal processing procedures based on different mathematical algorithms. Our basic experimental setup uses a nanosecond pulsed laser at 532nm wavelength that impacts onto the surface of the object under study. The laser pulse is rapidly absorbed into a shallow volume of material and creates a localized thermo-elastic expansion inducing a broadband ultrasound pulse that propagate inside the material. The laser beam scans a selected area of the object surface, being remotely controlled by means of a programmable XY scanner. For each excitation point, the ultrasound waves propagate through the object are reflected or scattered by material 3D defects. They are detected by ultrasound transducers and recorded with a PC data-acquisition system for a further process and analysis. As a first step, the time of flight analysis provides enough data for the location and size of the defect in 1D view. The detection capabilities of internal defects in a metallic sample are studied by means of wavelet transform, chosen due to its multi-resolution time-frequency characteristics. A novel algorithm using a density-based spatial clustering is applied to the resulting time frequency maps to estimate the defect's position. For the 2D visualization and reconstruction of the defects we extended the signal analysis using the synthetic aperture focusing technique (SAFT). We implement a novel 2D apodization window filtering applied along with the SAFT, and we show it removes undesired effects of the side lobes and wide-angle reflections of ultrasound waves, enhancing the reconstructed image of the defect. We move then towards the 3D analysis and reconstruction of defects and in this case we achieve and implement a fully non-contact and automatized experimental configuration allowing the scan areas on different object's faces. The defect details are recorded from different angles/perspectives and a complete 3D reconstruction is achieved. Finally, we show our results on a complementary topic related to a particular case of the ultrasound propagation in solids. We were concerned on the physical understanding of the propagation and diffraction of ultrasound waves in solid materials from the first moment. The control of the diffraction pattern in solids, using an ultrasonic lens, would help focus/collimate the ultrasound reducing echoes and boundary reflections, resulting in a further improve NDT process. Phononic crystals have been used to regulate the diffraction and frequency response of ultrasonic waves traveling in fluids. However, they were much less studied in solid materials due to the difficulty of building the crystal and to high coupling losses. We perform detailed numerical simulations of the ultrasound propagation in a solid phononic crystal and we show focusing and the self-collimation effects. We further extend our analysis and couple our phononic crystal lens to a solid under study, showing that the diffraction control is preserved inside the target solid object trough the coupling material.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
