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Ultrasonic Plate Waves For Fatigue Crack Detection In Multi Layered Metallic Structures Preprint
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Book Synopsis Ultrasonic Plate Waves for Fatigue Crack Detection in Multi-Layered Metallic Structures (Preprint). by :
Download or read book Ultrasonic Plate Waves for Fatigue Crack Detection in Multi-Layered Metallic Structures (Preprint). written by and published by . This book was released on 2006 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A representative area of concern for fatigue crack growth in aircraft occurs in multi-layered metallic structures. Ultrasonic plate waves are currently being investigated by multiple initiatives to detect these types of flaws with a minimal number of sensors to enable Structural Health Monitoring (SHM). Previous work has focused on structures with one or two layers, coupled with modeling of the wave propagation within these representative samples. However, it is common for multi-layered structures to have more than two layers in many areas of interest. Therefore, this study investigates ultrasonic wave propagation and flaw detection in a multi-layered samples. The flaws in this study are electric discharge machined (EDM) notches. Preliminary measurements show that EDM notches can be detected by the guided ultrasonic waves, but that the sensitivity to EDM notch location is dependent on the boundary conditions of each layer. The experimental results are supplemented by modeling of the guided wave propagation within the structure using the Finite Element Method. The results of this investigation establish some guidelines for the use of guided waves in multi-layered structures, plus challenges that exist for their use in SHM applications and strategies to address these challenges.
Book Synopsis Fatigue crack detection on structural steel members by using ultrasound excited thermography = Erkennung von Ermuedungsrissen in Stahlbauteilen durch ultraschallangeregte Thermografie by : Plum, Robin Marc
Download or read book Fatigue crack detection on structural steel members by using ultrasound excited thermography = Erkennung von Ermuedungsrissen in Stahlbauteilen durch ultraschallangeregte Thermografie written by Plum, Robin Marc and published by KIT Scientific Publishing. This book was released on 2015-08-27 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound excitation of structural steel members leads to localised energy dissipation at existent fatigue cracks and thus allows for thermographic flaw detection. Essential effects on the defect-selective heating, such as flaw size, plate thickness, crack mouth opening or static preload, are systematically investigated. Laser vibrometry measurements of the crack edges, theoretical modelling of frictional heating and numerical simulations contribute to the understanding of the involved physics.
Book Synopsis Structural Health Monitoring of Fatigue Crack Growth in Aluminum Structures Using Ultrasonic Guided Waves by : Hwanjeong Cho
Download or read book Structural Health Monitoring of Fatigue Crack Growth in Aluminum Structures Using Ultrasonic Guided Waves written by Hwanjeong Cho and published by . This book was released on 2010 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6 by : Dario Di Maio
Download or read book Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6 written by Dario Di Maio and published by Springer Nature. This book was released on 2021-08-25 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 39th IMAC, A Conference and Exposition on Structural Dynamics, 2021, the sixth volume of nine from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Health Monitoring, including papers on: Novel Techniques Optical Methods, Scanning LDV Methods Photogrammetry & DIC Rotating Machinery
Book Synopsis Fatigue Crack Detection on Structural Steel Members by Using Ultrasound Excited Thermography = Erkennung Von Ermüdungsrissen in Stahlbauteilen Durch Ultraschallangeregte Thermografie by : Robin Marc Plum
Download or read book Fatigue Crack Detection on Structural Steel Members by Using Ultrasound Excited Thermography = Erkennung Von Ermüdungsrissen in Stahlbauteilen Durch Ultraschallangeregte Thermografie written by Robin Marc Plum and published by . This book was released on 2020-10-09 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound excitation of structural steel members leads to localised energy dissipation at existent fatigue cracks and thus allows for thermographic flaw detection. Essential effects on the defect-selective heating, such as flaw size, plate thickness, crack mouth opening or static preload, are systematically investigated. Laser vibrometry measurements of the crack edges, theoretical modelling of frictional heating and numerical simulations contribute to the understanding of the involved physics. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Book Synopsis Ultrasonic Pulse Transmit-Receiver Method for Detecting and Monitoring of Fatigue Damage by : I. Mostafa
Download or read book Ultrasonic Pulse Transmit-Receiver Method for Detecting and Monitoring of Fatigue Damage written by I. Mostafa and published by . This book was released on 1999 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dedicated ultrasound transmission method is used for in-situ detection and monitoring of fatigue cracks. For this purpose, piezoelectric transducers are embedded at the ends of hourglass-shaped specimens of HSLA steel. One transducer emits constant-amplitude time-limited pulses which travel as longitudinal and surface waves. The waves are received by the other transducer and their times-of-flight and amplitudes are readily monitored by a digitizing oscilloscope. During constant amplitude fatigue cycling at constant R, a decrease in surface wave amplitude indicates crack initiation while crack propagation is sensed by the change in the amplitude of both waves. During initial fatigue cycles, the transmitted wave amplitudes may decrease due to cyclic plastic strain and the accumulation of dislocations. In subsequent cycles, the lattice defects reach a saturation level giving rise to a steady state level of the transmitted wave amplitudes. Wave amplitudes monitored during saturation stage serve as a reference for subsequent measurements of amplitude decrease that indicates the growth of a fatigue crack. Changing the applied load in the early stage of fatigue cycling has a little effect on the saturation level. Such an effect diminishes with fatigue cycling and does not interfere with the ability of detecting crack initiation. The method is capable of monitoring the entire history of fatigue damage evolution from initial strain hardening, through strain saturation, crack nucleation, crack growth to failure.
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1988 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engine Structures written by and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrasonic Guided Waves by : Cliff Lissenden
Download or read book Ultrasonic Guided Waves written by Cliff Lissenden and published by MDPI. This book was released on 2020-03-17 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The propagation of ultrasonic guided waves in solids is an important area of scientific inquiry, primarily due to their practical applications for nondestructive characterization of materials, such as nondestructive inspection, quality assurance testing, structural health monitoring, and providing a material state awareness. This Special Issue of Applied Sciences covers all aspects of ultrasonic guided waves (e.g., phased array transducers, meta-materials to control wave propagation characteristics, scattering, attenuation, and signal processing techniques) from the perspective of modeling, simulation, laboratory experiments, or field testing. In order to fully utilize ultrasonic guided waves for these applications, it is necessary to have a firm grasp of their requisite characteristics, which include that they are multimodal, dispersive, and are comprised of unique displacement profiles through the thickness of the waveguide.
Book Synopsis Structural Health Monitoring For Advanced Composite Structures by : M H Ferri Aliabadi
Download or read book Structural Health Monitoring For Advanced Composite Structures written by M H Ferri Aliabadi and published by World Scientific. This book was released on 2017-12-18 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) is a relatively new and alternative way of non-destructive inspection (NDI). It is the process of implementing a damage detection and characterization strategy for composite structures. The basis of SHM is the application of permanent fixed sensors on a structure, combined with minimum manual intervention to monitor its structural integrity. These sensors detect changes to the material and/or geometric properties of a structural system, including changes to the boundary conditions and system connectivity, which adversely affect the system's performance.This book's primary focus is on the diagnostics element of SHM, namely damage detection in composite structures. The techniques covered include the use of Piezoelectric transducers for active and passive Ultrasonics guided waves and electromechanical impedance measurements, and fiber optic sensors for strain sensing. It also includes numerical modeling of wave propagation in composite structures. Contributed chapters written by leading researchers in the field describe each of these techniques, making it a key text for researchers and NDI practitioners as well as postgraduate students in a number of specialties including materials, aerospace, mechanical and computational engineering.
Download or read book Metals Abstracts written by and published by . This book was released on 1981 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Journal of the Iron and Steel Institute by : Iron and Steel Institute
Download or read book The Journal of the Iron and Steel Institute written by Iron and Steel Institute and published by . This book was released on 1966 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the institute's Proceedings.
Book Synopsis Metallurgical Abstracts by : Institute of Metals
Download or read book Metallurgical Abstracts written by Institute of Metals and published by . This book was released on 1958 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1987 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Giant Magnetoresistance (GMR) Sensors by : Candid Reig
Download or read book Giant Magnetoresistance (GMR) Sensors written by Candid Reig and published by Springer Science & Business Media. This book was released on 2013-12-06 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of the giant magnetoresistance (GMR) effect in 1988, spintronics has been presented as a new technology paradigm, awarded by the Nobel Prize in Physics in 2007. Initially used in read heads of hard disk drives, and while disputing a piece of the market to the flash memories, GMR devices have broadened their range of usage by growing towards magnetic field sensing applications in a huge range of scenarios. Potential applications at the time of the discovery have become real in the last two decades. Definitively, GMR was born to stand. In this sense, selected successful approaches of GMR based sensors in different applications: space, automotive, microelectronics, biotechnology ... are collected in the present book. While keeping a practical orientation, the fundamentals as well as the current trends and challenges of this technology are also analyzed. In this sense, state of the art contributions from academy and industry can be found through the contents. This book can be used by starting researchers, postgraduate students and multidisciplinary scientists in order to have a reference text in this topical fascinating field.
Book Synopsis Acoustic Emission by : Zinoviy Nazarchuk
Download or read book Acoustic Emission written by Zinoviy Nazarchuk and published by Springer. This book was released on 2017-01-23 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph analyses in detail the physical aspects of the elastic waves radiation during deformation or fracture of materials. It presents the methodological bases for the practical use of acoustic emission device, and describes the results of theoretical and experimental researches of evaluation of the crack growth resistance of materials, selection of the useful AE signals. The efficiency of this methodology is shown through the diagnostics of various-purpose industrial objects. The authors obtain results of experimental researches with the help of the new methods and facilities.
