Download or read book Ultrasonic Guided Waves based Structural Health Monitoring written by Zhanjun Wu and published by LAP Lambert Academic Publishing. This book was released on 2014-09-24 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key industrial equipment (such as pipelines, aircraft structure and tanks) should meet the requirements for reliability, integrity and safety for a long-term operation. During its service, defects that might be caused by natural disasters or external impacts could lead to a significant reduction in a structure's strength and fatigue life. Therefore, structural health monitoring techniques, which are capable of achieving continuous monitoring and on-line damage detection, are important for increasing the service life and reducing the sustainment costs of key industrial equipment. Guided waves-based structural health monitoring technology is a multidisciplinary study which requires a deep understanding of materials, sensors, modeling forms, electronic circuits, signal processing methods, and diagnostic algorithms. Therefore, this book provides the readers with a summary of the fundamental knowledge as well as methods of ultrasonic guided waves and introduces them to some case studies of structural health monitoring as they are applied in the context of the key industrial equipment monitoring problems.

Download or read book Guided Waves in Structures for SHM written by Wieslaw Ostachowicz and published by John Wiley & Sons. This book was released on 2011-12-30 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding and analysing the complex phenomena related to elastic wave propagation has been the subject of intense research for many years and has enabled application in numerous fields of technology, including structural health monitoring (SHM). In the course of the rapid advancement of diagnostic methods utilising elastic wave propagation, it has become clear that existing methods of elastic wave modeling and analysis are not always very useful; developing numerical methods aimed at modeling and analysing these phenomena has become a necessity. Furthermore, any methods developed need to be verified experimentally, which has become achievable with the advancement of measurement methods utilising laser vibrometry. Guided Waves in Structures for SHM reports on the simulation, analysis and experimental investigation related propagation of elastic waves in isotropic or laminated structures. The full spectrum of theoretical and practical issues associated with propagation of elastic waves is presented and discussed in this one study. Key features: Covers both numerical and experimental aspects of modeling, analysis and measurement of elastic wave propagation in structural elements formed from isotropic or composite materials Comprehensively discusses the application of the Spectral Finite Element Method for modelling and analysing elastic wave propagation in diverse structural elements Presents results of experimental measurements employing advanced laser technologies, validating the quality and correctness of the developed numerical models Accompanying website (www.wiley.com/go/ostachowicz) contains demonstration versions of commercial software developed by the authors for modelling and analyzing elastic wave propagation using the Spectral Finite Element Method Guided Waves in Structures for SHM provides a state of the art resource for researchers and graduate students in structural health monitoring, signal processing and structural dynamics. This book should also provide a useful reference for practising engineers within structural health monitoring and non-destructive testing.

Download or read book Structural Health Monitoring by Ultrasonic Guided Waves written by Ivan Bartoli and published by . This book was released on 2007 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guided ultrasonic waves provide a highly efficient method for the non-destructive evaluation (NDE) and the structural health monitoring (SHM) of solids with finite cross-sectional dimensions (waveguides). Compared to the widely used ultrasonic bulk waves, guided waves provide larger monitoring ranges and the complete coverage of the waveguide cross-section. Compared to global vibrations, guided waves offer increased sensitivity to smaller defects due to the smaller wavelengths involved. These advantages can be fully exploited only once the complexities of guided wave propagation (multimode, dispersion, frequency-dependent attenuation) are unveiled and managed for the given test structure. This doctoral dissertation is aimed at developing a Semi-Analytical Finite Element (SAFE) method for modeling wave propagation in waveguides of arbitrary cross-section. The method requires the finite element discretization of the cross-section of the waveguide, and assumes harmonic motion along the wave propagation direction. The general SAFE technique was extended to account for viscoelastic material damping by allowing for complex stiffness matrices for the material. The dispersive solutions are obtained in terms of phase velocity, group velocity (for undamped media), energy velocity (for damped media), attenuation, and cross-sectional mode shapes. Once the dispersive properties are computed, the wave motion can be interpreted and the forced response can be predicted. The proposed SAFE formulation was applied to enhance the use of ultrasonic guided waves in a number of applications and to interpret the corresponding experimental results. The following three applications were considered : defect detection in adhesively-bonded joints found in the wing skin-to-spar assemblies of Unmanned Aerial Vehicles; defect detection in railroad tracks; load monitoring and defect detection in seven-wire steel strands used in cables and prestressed concrete structures.

Download or read book Ultrasonic Guided Waves in Solid Media written by Joseph L. Rose and published by Cambridge University Press. This book was released on 2014-08-11 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic guided waves in solid media have become a critically important subject in nondestructive testing and structural health monitoring, as new faster, more sensitive, and more economical ways of looking at materials and structures have become possible. This book will lead to fresh creative ideas for use in new inspection procedures. Although the mathematics is sometimes sophisticated, the book can also be read by managers without detailed understanding of the concepts as it can be read from a 'black box' point of view. Overall, the material presented on wave mechanics - in particular, guided wave mechanics - establishes a framework for the creative data collection and signal processing needed to solve many problems using ultrasonic nondestructive evaluation and structural health monitoring. The book can be used as a reference in ultrasonic nondestructive evaluation by professionals and as a textbook for seniors and graduate students. This work extends the coverage of Rose's earlier book Ultrasonic Waves in Solid Media.

Download or read book Lamb Wave Based Structural Health Monitoring in Polymer Composites written by Rolf Lammering and published by Springer. This book was released on 2017-08-30 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses especially on the application of SHM technology to thin walled structural systems made from carbon fiber reinforced plastics. Here, guided elastic waves (Lamb-waves) show an excellent sensitivity to structural damages so that they are in the center of this book. It is divided into 4 sections dealing with analytical, numerical and experimental fundamentals, and subsequently with Lamb-wave propagation in fiber reinforced composites, SHM-systems and signal processing. The book is designed for engineering students as well as for researchers in the field of structural health monitoring and for users of this technology.

Download or read book Optimal Methodologies for Ultrasonic Guided wave Based Structural Health Monitoring written by Sergio Cantero Chinchilla and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Guided wave Structural Health Monitoring written by Ajay Raghavan and published by . This book was released on 2007 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uncertainty Quantification Of Guided Wave Structural Health Monitoring For Aeronautical Composite Structures written by Nan Yue and published by World Scientific. This book was released on 2024-01-10 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a guided wave-based structural health monitoring (GWSHM) system for aeronautical composite structures. Particular attention is paid to the development of a reliable and reproducible system with the capability to detect and localise barely visible impact damage (BVID) in carbon-fibre-reinforced polymer (CFRP) structures.TThe authors introduce a novel sensor installation method that offers ease of application and replacement as well as excellent durability. Electromechanical Impedance (EMI) is also explored to assess the durability of the sensor installation methods in simulated aircraft operational conditions including thermal cycles, fatigue loading, and hot-wet conditions.Damage characterisation using GWSHM is described and used to investigate damage in different CFRP structures. Key issues in guided wave-based damage identification are addressed, including wave mode and frequency selection, the influence of dynamic load, the validity of simulated damage, and the sensitivity of guided waves to impact damage in different CFRP materials.The influence of temperature on guided wave propagation in anisotropic CFRP structures is described, and a novel baseline reconstruction approach for temperature compensation is presented. Finally, a multi-level hierarchical approach for the quantification of an ultrasonic GWSHM system is put forth.

Download or read book Quantitative Structural Health Monitoring Using Ultrasonic Guided Waves written by Ankit Srivastava and published by . This book was released on 2009 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Health Monitoring with Piezoelectric Wafer Active Sensors written by Victor Giurgiutiu and published by Academic Press. This book was released on 2014-06-20 with total page 1025 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Health Monitoring with Piezoelectric Wafer Active Sensors, Second Edition provides an authoritative theoretical and experimental guide to this fast-paced, interdisciplinary area with exciting applications across a range of industries. The book begins with a detailed yet digestible consolidation of the fundamental theory relating to structural health monitoring (SHM). Coverage of fracture and failure basics, relevant piezoelectric material properties, vibration modes in different structures, and different wave types provide all the background needed to understand SHM and apply it to real-world structural challenges. Moving from theory to experimental practice, the book then provides the most comprehensive coverage available on using piezoelectric wafer active sensors (PWAS) to detect and quantify damage in structures. Updates to this edition include circular and straight-crested Lamb waves from first principle, and the interaction between PWAS and Lamb waves in 1-D and 2-D geometries. Effective shear stress is described, and tuning expressions between PWAS and Lamb waves has been extended to cover axisymmetric geometries with a complete Hankel-transform-based derivation. New chapters have been added including hands-on SHM case studies of PWAS stress, strain, vibration, and wave sensing applications, along with new sections covering essential aspects of vibration and wave propagation in axisymmetric geometries. Comprehensive coverage of underlying theory such as piezoelectricity, vibration, and wave propagation alongside experimental techniques Includes step-by-step guidance on the use of piezoelectric wafer active sensors (PWAS) to detect and quantify damage in structures, including clear information on how to interpret sensor signal patterns Updates to this edition include a new chapter on composites and new sections on advances in vibration and wave theory, bringing this established reference in line with the cutting edge in this emerging area

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.

Download or read book Ultrasonic Guided Waves in Solid Media written by Joseph L. Rose and published by Cambridge University Press. This book was released on 2014-08-11 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic guided waves in solid media are important in nondestructive testing and structural health monitoring, as new faster, more sensitive, and economical ways of looking at materials and structures have become possible. This book can be read by managers from a "black box" point of view, or used as a professional reference or textbook.

Download or read book Advances in Structural Health Monitoring written by Maguid H.M. Hassan and published by BoD – Books on Demand. This book was released on 2019-11-20 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concepts presented in this book are some of the new advancements in the design of structural health monitoring systems. It is envisaged that such advancements will lead to smart structural health monitoring that will result in sustainable engineering systems. Sustainability is considered an important objective in today's engineering design due to the current state of climate change and global warming, both of which are hugely aggravated by industrial and construction activities. This book presents demonstrations of and applications for new advancements such as infrared thermography, ultrasonic guided waves, and strain sensors, among others. The information presented will encourage further research and implementation of these advanced techniques and technologies in structural health monitoring.

Download or read book A Bayesian Experimental Design Approach to Structural Health Monitoring with Application to Ultrasonic Guided Waves written by Eric Brian Flynn and published by . This book was released on 2010 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dissertation will present the application of a Bayesian experimental design framework to structural health monitoring (SHM). When applied to SHM, Bayesian experimental design (BED) is founded on the minimization of the expected loss, i.e., Bayes Risk, of the SHM process through the optimization of the detection algorithm and system hardware design parameters. This expected loss is a function of the detector and system design, the cost of decision/detection error, and the distribution of prior probabilities of damage. While the presented framework is general to all SHM applications, particular attention is paid to guided wave-based SHM (GWSHM). GWSHM is the process of exciting user-defined mechanical waves in plate or beam-like structures and sensing the response in order to identify damage, which manifests itself though scattering and attenuation of the traveling waves. Using the BED framework, both a detection-centric and a localization-centric optimal detector are derived for GWSHM based on likelihood tests. In order to objectively evaluate the performance in practical terms for the users of SHM systems, the dissertation will introduce three new statistics-based tools: the Bayesian combined receiver operating characteristic (BCROC) curve, the localization probability density (LPDF) estimate, and the localizer operating characteristic (LOC) curve. It will demonstrate the superior performance of the BED-based detectors over existing GWSHM algorithms through application to a geometrically complex test structure. Next, the BED framework is used to establish both a model-based and data-driven system design process for GWSHM to ascertain the optimal placement of both actuators and sensors according to application-specific decision error cost functions. This design process considers, among other things, non-uniform probabilities of damage, non-symmetric scatterers, the optimization of both sensor placement and sensor count, and robustness to sensor failure. The sensor placement design process is demonstrated and verified using several hypothetical and real-world design scenarios.

Download or read book Health Monitoring of Aerospace Structures written by Wieslaw Staszewski and published by John Wiley & Sons. This book was released on 2004-02-13 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing quality research for the reader, this title encompasses all the recent developments in smart sensor technology for health monitoring in aerospace structures, providing a valuable introduction to damage detection techniques. Focussing on engineering applications, all chapters are written by smart structures and materials experts from aerospace manufacturers and research/academic institutions. This key reference: Discusses the most important aspects related to smart technologies for damage detection; this includes not only monitoring techniques but also aspects related to specifications, design parameters, assessment and qualification routes. Presents real case studies and applications; this includes in-flight tests; the work presented goes far beyond academic research applications. Displays a balance between theoretical developments and engineering applications

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.