Victor Giurgiutiu

Structural Health Monitoring with Piezoelectric Wafer Active Sensors, Third Edition provides an authoritative theoretical and experimental guide to this fast-paced, interdisciplinary area with exciting applications across a range of industries. It judiciously combines theory, numerical examples, and experiments providing the background needed to fully understand the physical principles involved in performing structural health monitoring (SHM) with piezoelectric wafer active sensor (PWAS) transducers. The book starts with a detailed yet digestible consolidation of the fundamental theory relating to SHM, covering fracture and failure basics, relevant piezoelectric material properties, vibration modes in different structures, and different wave types, providing the background necessary to understand SHM and apply it to real-world structural challenges. From there the book segues to experimental practice covering several complementary methods of using PWAS transducers for SHM applications, such as propagating guided waves (pitch-catch; pulse-echo; phased-array) and standing guided waves. Numerical examples have been added throughout in support of understanding the underlying theory, and the companion website contains MATLAB code, simulation videos, and other supporting materials. An instructor’s manual is available upon request for teachers using the book in the classroom. Updates to this 3rd edition include sections covering flexural vibration energy of a beam; bulk wave interaction at interfaces; power and energy of Rayleigh waves; group velocity, power, and energy of shear waves; power and energy of Lamb waves; simplified Helmholtz equations solution through gauge condition manipulation; normal mode expansion solution for Lamb waves tuning; guided wave interaction with damage, hybrid global local method; and determination of wave damage interaction coefficients through local FEM analysis with nonreflective boundaries in the frequency domain.

Stress, Vibration, and Wave Analysis in Aerospace Composites: SHM and NDE Applications presents a unified approach to studying and understanding stress, vibrations and waves in composite materials used in aerospace applications. Combining topics that are typically found across an array of various sources, the book starts by looking at the properties of various composite materials, progresses to coverage of an analysis of stress, vibration and waves and then concludes with a discussion of various structural health monitoring (SHM) and nondestructive evaluation (NDE) techniques and applications based on the analysis developed earlier in the book. Every chapter of the book contains a variety of worked-out examples to illustrate and tie together underlying theory and specific applications. The MATLAB code used to generate these examples is available on the book’s companion website, as are solution documents and additional MATLAB code for problems and exercises featured in each chapter.

Structural Health Monitoring of Aerospace Composite Structures offers a comprehensive review of established and promising technologies under development in the emerging area of structural health monitoring (SHM) of aerospace composite structures. Beginning with a description of the different types of composite damage, which differ fundamentally from the damage states encountered in metallic airframes, the book moves on to describe the SHM methods and sensors currently under consideration before considering application examples related to specific composites, SHM sensors, and detection methods. Expert author Victor Giurgiutiu closes with a valuable discussion of the advantages and limitations of various sensors and methods, helping you to make informed choices in your structure research and development.

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.

Focusing on recent developments in engineering science, enabling hardware, advanced technologies, and software, Micromechatronics: Modeling, Analysis, and Design with MATLAB®, Second Edition provides clear, comprehensive coverage of mechatronic and electromechanical systems. It applies cornerstone fundamentals to the design of electromechanical systems, covers emerging software and hardware, introduces the rigorous theory, examines the design of high-performance systems, and helps develop problem-solving skills. Along with more streamlined material, this edition adds many new sections to existing chapters. New to the Second Edition Updated and extended worked examples along with the associated MATLAB® codesAdditional problems and exercises at the end of many chaptersNew sections on MATLAB New case studiesThe book explores ways to improve and optimize a broad spectrum of electromechanical systems widely used in industrial, transportation, and power systems. It examines the design and analysis of high-performance mechatronic systems, energy systems, efficient energy conversion, power electronics, controls, induced-strain devices, active sensors, microcontrollers, and motion devices. The text also enables a deep understanding of the multidisciplinary underpinnings of engineering. It can be used for courses in mechatronics, power systems, energy systems, active materials and smart structures, solid-state actuation, structural health monitoring, and applied microcontroller engineering.