Strain Transfer Behavior of Notch Embedded Fiber Bragg Gratings

Strain Transfer Behavior of Notch Embedded Fiber Bragg Gratings
Author: Daniel Thomas Maurais
Publisher:
Total Pages: 85
Release: 2012
Genre: Bridges
ISBN: 9781267842299

The vehicle loads seen on Wyoming roadways are continuously increasing due to the demanding transportation needs of Wyoming's expanding energy industry. The resulting overload conditions experienced by Wyoming's aging bridges have called for the implementation of a structural health monitoring (SHM) system. A SHM system utilizing fiber optic strain sensors called Fiber Bragg Gratings (FBGs) have proven in recent years to be an innovative and effective solution for monitoring bridge conditions. Such a system will allow WYDOT engineers to monitor the damages and fatigue effects of overloaded Wyoming bridges over years of service. This research examined a new method of attaching FBG strain sensors to concrete structural members via adhesive embedment in concrete notches. The proposed method is ideal because it provides ample fiber protection from weathering and vandalism. Additionally, the FBG becomes a rooted component of the structure that is unlikely to detach or be scraped off throughout years of service. Both a finite element analysis (FEA) and an experimental investigation were conducted to analyze the effectiveness and feasibility of the proposed concrete strain monitoring method. The strain loss over the adhesive layer between the concrete and the FBG sensor was the primary variable of interest in the study. The strain loss directly affects the accuracy of the sensors in measuring the strain of the concrete. Several attachment configurations with different parameters were tested. The results of this study support the conclusion that there are certain notch embedment configurations that will provide accurate strain measurement of a concrete structural member. It was found that the FEA predicts slightly higher strain transfer than what occurs in real conditions. A feasible procedure for implementing the proposed sensing method in field conditions was developed during the experimental tests.

Experimental Vibration Analysis for Civil Structures

Experimental Vibration Analysis for Civil Structures
Author: Joel P. Conte
Publisher: Springer
Total Pages: 926
Release: 2017-10-11
Genre: Technology & Engineering
ISBN: 3319674439

This edited volume presents selected contributions from the International Conference on Experimental Vibration Analysis of Civil Engineering Structures held in San Diego, California in 2017 (EVACES2017). The event brought together engineers, scientists, researchers, and practitioners, providing a forum for discussing and disseminating the latest developments and achievements in all major aspects of dynamic testing for civil engineering structures, including instrumentation, sources of excitation, data analysis, system identification, monitoring and condition assessment, in-situ and laboratory experiments, codes and standards, and vibration mitigation.

Fiber Bragg Gratings

Fiber Bragg Gratings
Author: Andreas Othonos
Publisher: Artech House Publishers
Total Pages: 448
Release: 1999
Genre: Science
ISBN:

Fiber Bragg gratings are flexible, cost-effective and highly efficient, with a vast range of potential applications. This timely new work provides a comprehensive description of the principles and practical applications of this latest technology, which has the potential to revolutionize telecommunications and significantly impact optical fiber sensing. Here the authors explain the underlying physics and practical aspects in a clear and unambiguous manner.

Lab-on-Fiber Technology

Lab-on-Fiber Technology
Author: Andrea Cusano
Publisher: Springer
Total Pages: 377
Release: 2014-07-29
Genre: Science
ISBN: 3319069985

This book focuses on a research field that is rapidly emerging as one of the most promising ones for the global optics and photonics community: the “lab-on-fiber” technology. Inspired by the well-established "lab on-a-chip" concept, this new technology essentially envisages novel and highly functionalized devices completely integrated into a single optical fiber for both communication and sensing applications. Based on the R&D experience of some of the world's leading authorities in the fields of optics, photonics, nanotechnology, and material science, this book provides a broad and accurate description of the main developments and achievements in the lab-on-fiber technology roadmap, also highlighting the new perspectives and challenges to be faced. This book is essential for scientists interested in the cutting-edge fiber optic technology, but also for graduate students.

Wavelength Filters in Fibre Optics

Wavelength Filters in Fibre Optics
Author: Herbert Venghaus
Publisher: Springer
Total Pages: 472
Release: 2006-09-21
Genre: Science
ISBN: 3540317708

This is the first book dedicated to wavelength filters for fibre optics. It provides a comprehensive account of the principles and applications of such filters, including their technological realizations. It explains the relevant performance parameters, the particular advantages and shortcomings of the various concepts and components, and the preferred applications. There is also in-depth information on the characteristics of commercially available devices.

Guided Wave Optical Components and Devices

Guided Wave Optical Components and Devices
Author: Bishnu P. Pal
Publisher: Academic Press
Total Pages: 467
Release: 2010-07-19
Genre: Technology & Engineering
ISBN: 0080532713

Guided Wave Optical Components and Devices provides a comprehensive, lucid, and clear introduction to the world of guided wave optical components and devices. Bishnu Pal has collaborated with some of the greatest minds in optics to create a truly inclusive treatise on this contemporary topic. Written by leaders in the field, this book delivers cutting-edge research and essential information for professionals, researchers, and students on emerging topics like microstructured fibers, broadband fibers, polymer fiber components and waveguides, acousto-optic interactions in fibers, higher order mode fibers, nonlinear and parametric process in fibers, revolutionary effects of erbium doped and Raman fiber amplifiers in DWDM and CATV networks, all-fiber network branching component technology platforms like fused fiber couplers, fiber gratings, and side-polished fiber half-couplers, arrayed waveguides, optical MEMS, fiber sensing technologies including safety, civil structural health monitoring, and gyroscope applications. Accessible introduction to wide range of topics relating to established and emerging optical components Single-source reference for graduate students in optical engineering and newcomer practitioners, focused on components Extensive bibliographical information included so readers can get a broad introduction to a variety of optical components and their applications in an optical network

Applications of Nonlinear Fiber Optics

Applications of Nonlinear Fiber Optics
Author: Govind P. Agrawal
Publisher: Academic Press
Total Pages: 523
Release: 2010-07-28
Genre: Science
ISBN: 0080568769

The development of new highly nonlinear fibers - referred to as microstructured fibers, holey fibers and photonic crystal fibers - is the next generation technology for all-optical signal processing and biomedical applications. This new edition has been thoroughly updated to incorporate these key technology developments. The book presents sound coverage of the fundamentals of lightwave technology, along with material on pulse compression techniques and rare-earth-doped fiber amplifiers and lasers. The extensively revised chapters include information on fiber-optic communication systems and the ultrafast signal processing techniques that make use of nonlinear phenomena in optical fibers. New material focuses on the applications of highly nonlinear fibers in areas ranging from wavelength laser tuning and nonlinear spectroscopy to biomedical imaging and frequency metrology. Technologies such as quantum cryptography, quantum computing, and quantum communications are also covered in a new chapter. This book will be an ideal reference for: R&D engineers working on developing next generation optical components; scientists involved with research on fiber amplifiers and lasers; graduate students and researchers working in the fields of optical communications and quantum information. The only book on how to develop nonlinear fiber optic applications Two new chapters on the latest developments; Highly Nonlinear Fibers and Quantum Applications Coverage of biomedical applications

Structural Health Monitoring Damage Detection Systems for Aerospace

Structural Health Monitoring Damage Detection Systems for Aerospace
Author: Markus G. R. Sause
Publisher: Springer Nature
Total Pages: 292
Release: 2021
Genre: Aerospace engineering
ISBN: 3030721922

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.