Uncertainty Quantification Of Guided Wave Structural Health Monitoring For Aeronautical Composite Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Uncertainty Quantification Of Guided Wave Structural Health Monitoring For Aeronautical Composite Structures write by Nan Yue. This book was released on 2024-01-10. Uncertainty Quantification Of Guided Wave Structural Health Monitoring For Aeronautical Composite Structures available in PDF, EPUB and Kindle. 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.
Uncertainty Quantification of Guided Wave Structural Health Monitoring for Aeronautical Composite Structures
Uncertainty Quantification of Guided Wave Structural Health Monitoring for Aeronautical Composite Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Uncertainty Quantification of Guided Wave Structural Health Monitoring for Aeronautical Composite Structures write by Nan Yue. This book was released on 2024-02-15. Uncertainty Quantification of Guided Wave Structural Health Monitoring for Aeronautical Composite Structures available in PDF, EPUB and Kindle. This monograph presents a Guided Wave 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.A novel sensor installation method that offers ease of application and replacement as well as excellent durability is introduced. Electromechanical Impedance (EMI) is also introduced 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 highlighted and 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 presented.
Structural Health Monitoring (SHM) in Aerospace Structures
Structural Health Monitoring (SHM) in Aerospace Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Structural Health Monitoring (SHM) in Aerospace Structures write by Fuh-Gwo Yuan. This book was released on 2016-03-01. Structural Health Monitoring (SHM) in Aerospace Structures available in PDF, EPUB and Kindle. Structural Health Monitoring (SHM) in Aerospace Structures provides readers with the spectacular progress that has taken place over the last twenty years with respect to the area of Structural Health Monitoring (SHM). The widespread adoption of SHM could both significantly improve safety and reduce maintenance and repair expenses that are estimated to be about a quarter of an aircraft fleet’s operating costs. The SHM field encompasses transdisciplinary areas, including smart materials, sensors and actuators, damage diagnosis and prognosis, signal and image processing algorithms, wireless intelligent sensing, data fusion, and energy harvesting. This book focuses on how SHM techniques are applied to aircraft structures with particular emphasis on composite materials, and is divided into four main parts. Part One provides an overview of SHM technologies for damage detection, diagnosis, and prognosis in aerospace structures. Part Two moves on to analyze smart materials for SHM in aerospace structures, such as piezoelectric materials, optical fibers, and flexoelectricity. In addition, this also includes two vibration-based energy harvesting techniques for powering wireless sensors based on piezoelectric electromechanical coupling and diamagnetic levitation. Part Three explores innovative SHM technologies for damage diagnosis in aerospace structures. Chapters within this section include sparse array imaging techniques and phase array techniques for damage detection. The final section of the volume details innovative SHM technologies for damage prognosis in aerospace structures. This book serves as a key reference for researchers working within this industry, academic, and government research agencies developing new systems for the SHM of aerospace structures and materials scientists. Provides key information on the potential of SHM in reducing maintenance and repair costs Analyzes current SHM technologies and sensing systems, highlighting the innovation in each area Encompasses chapters on smart materials such as electroactive polymers and optical fibers
Structural Health Monitoring For Advanced Composite Structures
Structural Health Monitoring For Advanced Composite Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Structural Health Monitoring For Advanced Composite Structures write by M H Ferri Aliabadi. This book was released on 2017-12-18. Structural Health Monitoring For Advanced Composite Structures available in PDF, EPUB and Kindle. 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.
Structural Health Monitoring of Aircraft Composite Structures Using Ultrasonic Guided Wave Propagation
Structural Health Monitoring of Aircraft Composite Structures Using Ultrasonic Guided Wave Propagation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Structural Health Monitoring of Aircraft Composite Structures Using Ultrasonic Guided Wave Propagation write by Mohammad Hossein Sherafat. This book was released on 2017. Structural Health Monitoring of Aircraft Composite Structures Using Ultrasonic Guided Wave Propagation available in PDF, EPUB and Kindle. "Despite enhancements in terms of specific strength and stiffness by using composite in aircraft structures, their susceptibility to hide damage is still a major point of concern. The objective of this work is to investigate guided wave propagation in composite structures to detect delaminations, disbond and impact damage.The majority of the work focuses on assessment of composite joints. Primarily, a simple composite structure configuration was chosen to evaluate the effect of artificial and real damage on guided wave behaviour. The results show that non-mid-plane artificial delamination can accurately represent real impact, particularly barely visible impact damage (BVID). Next, a composite skin-stringer assembly and a composite scarf repair were chosen in order to represent typical aerospace structural joint features. The reflection, transmission and scattering behaviour of the plane guided waves are studied as a function of mode, frequency, excitation angle and the quality of the joint. For the composite skin-stringer, two inspection strategies are applied. From the first strategy, the within-the-bond, it is concluded that the antisymmetric mode (A0) transmission is highly sensitive to the damage for frequencies below 350 kHz, while the symmetric mode (S0) reflection around 200 kHz could be employed for monitoring an echo induced by the disbond. For imaging the disbond based on the scattering of the waves, the S0 mode appears as the best candidate below 350 kHz, by inducing an increase of 60 % of the scattered field in the presence of a disbond. The results from the second strategy, the across-the-bond, indicate that the A0 mode behaves more directionally while S0 is more refracted, specifically at low frequencies. For damage imaging, the S0 mode appears to be sensitive enough to disbonds (an increase of 30 % of the scattered wave) at around 150 kHz. Comparison of the pristine and damaged repair joint indicates reflection at the tip of each layer in the scarf (the reflections from the steps' edges), which can be an indication for evaluation of the quality of the joint. The anti-symmetric mode in the pulse-echo configuration seems to be an efficient mode and strategy for disbond detection in composite repairs. " --
