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Application Of Finite Element Models To Eddy Current Probe Design For Aircraft Inspection
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Book Synopsis Application of Finite Element Models to Eddy Current Probe Design for Aircraft Inspection by : Sarit Sharma
Download or read book Application of Finite Element Models to Eddy Current Probe Design for Aircraft Inspection written by Sarit Sharma and published by . This book was released on 1998 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: MOI is a nondestructive testing method currently in use in aircraft frame inspection and it involves optically sensing the magnetic field induced by the eddy currents in the test sample. A numerical model for simulating the MOI test geometry has been developed as an aid for tool optimization. In the modeling work, effort is focused towards reducing the computation time and utilize larger computer memory the programs that solve the linear equations obtained in the finite element method have been parallelized using the message passing interface (MPI) to run on a cluster of computers.
Book Synopsis Finite Element Modeling of MOI for NDE Applications by : Chao Chen
Download or read book Finite Element Modeling of MOI for NDE Applications written by Chao Chen and published by . This book was released on 2000 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magneto-optic eddy current imaging (MOI) systems have shown considerable promise in detecting both surface and subsurface corrosion and cracking of aging aircraft. MOI systems can produce real-time analog images of inspected parts, image both surface breaking and subsurface cracks without removing paint or decal. The images are easy to interpret, which in turn reduces inspection time and labor. Improvements and innovations in probe design are constantly required for detecting smaller and smaller flaws in complex multi-layer aircraft structures. Crucial for such studies is the development of a numerical model for simulating the underlying physical process, which can help in making more informed design optimization decisions. This thesis presents the development of a FEM for predicting quantitative values of the fields detected using MO imaging systems. The model is used extensively to study the effect of parametric variations on the field values. The results demonstrate the usefulness of the finite element model not only in understanding the capabilities of the instrument, but also in identifying optimal test parameters, and development of image interpretation algorithms.
Book Synopsis Finite Element and Meshless Methods in NDT Applications by : Liang Xuan
Download or read book Finite Element and Meshless Methods in NDT Applications written by Liang Xuan and published by . This book was released on 2002 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eddy current nondestructive testing (NDT) methods are extensively used in the inspection of aging aircrafts. Thousands of fasteners and bonded joints on each aircraft should be inspected and in order to handle the huge task, fast, accurate and cost effective inspection methods are clearly needed. Some of the challenges encountered in eddy current testing are (1) detection of corrosions or cracks in the multi-layer structures, (2) detection of cracks under the fastener (CUF), (3) detection of surface and subsurface defects close to edges. Conventional eddy current inspection method is time consuming due to the small probe size and large inspection area. Furthermore it requires trained operators for data interpretation. Development of new techniques for rapid and accurate inspection is of considerable interest to the aviation industry. In this dissertation, a more recent eddy current technique called magneto-optic imaging (MOI) is studied. The availability of a theoretical model that can simulate the MOI system performance is extremely important for understanding and optimizing the MOI sensor and hardware system. In this dissertation, finite element (FE) methods have been applied to numerically compute the electromagnetic fields associated with MOI testing with respect to variation in parameters such as operating frequency, source current and sensor parameters. Most of the testing geometries are three-dimensional and consequently the FE models require extensive computational resources. This paper presents a robust FE model based on A-V formulation and a fast iterative solver, which offers a distinct advantage in terms of computational time and data storage. A major contribution of this work is the development of Element-Free Galerkin (EFG) method for NDE applications. In order to model the complex CUF geometry, EFG method has been studied. Two and three-dimensional models for Poisson equation and diffusion equation, describing static or low frequency problems, have been developed and compared with conventional FE methods, EFG methods have also been applied to multi-frequency and pulsed eddy current problems. Simulation results clearly demonstrate the feasibility of the method for time-dependent field applications.
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 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Review of Progress in Quantitative Nondestructive Evaluation by : Donald O. Thompson
Download or read book Review of Progress in Quantitative Nondestructive Evaluation written by Donald O. Thompson and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 2198 pages. Available in PDF, EPUB and Kindle. Book excerpt: These Proceedings, consisting of Parts A and B, contain the edited versions of most of the papers presented at the annual Review of Progress in Quantitative Nondestructive Evaluation held at Bowdoin College, Brunswick, Maine on July 28 to August 2, 1996. The Review was organized by the Center for NDE at Iowa State University, in cooperation with the American Society of Nondestructive Testing, the Ames Laboratory of the USDOE, the Federal Aviation Administration, the National Institute of Standardsand Technology, and the National Science Foundation Industry!University Cooperative Research Centers pro gram. This year's Review of Progress in QNDE was attended by approximately 400 participants from the U.S. and many foreign countries who presented over 350 papers. As usual, the meetingwas divided into 36 sessions, with as many as four sessions running concurrently. The Review covered all phases of NDE research and development from fundamental investigations to engineering applications or inspection systems, and it included many important methods of inspection techniques from acoustics to x-rays. In the last eight to ten years, the Review has stabilized at about its current size, which most participants seem to agree is large enough to permit a full-scale overview of the latest developments, but still small enough to retain the collegial atmosphere which has marked the Review since its inception.
Book Synopsis Novel Simulation and Data Processing Algorithms for Eddy Current Inspection by : Anton Efremov
Download or read book Novel Simulation and Data Processing Algorithms for Eddy Current Inspection written by Anton Efremov and published by . This book was released on 2020 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eddy Current Testing (ECT) is a widely used technique in the area of Nondestructive Evaluation. It offers a cheap, fast, non-contact way for finding surface and subsurface defects in a conductive material. Due to development of new designs of eddy current probe coils and advance of model based solutions to inverse problems in ECT, there is an emerging need for fast and accurate numerical methods for efficient modeling and processing of the data. This work contributes to the two directions of computational ECT: eddy current inspection simulation ("forward problem") and analysis of the measured data for automated defect detection ("inverse problem").A new approach to simulate low-frequency electromagnetics in 3D is presented, based on a combination of a frequency-domain reduced vector potential formulation with a boundary condition based on Dirichlet-to-Neumann operator. The equations are solved via a Finite Element Method (FEM), and a novel technique for the fast solution of the related linear system is proposed. The performance of the method is analyzed for a few representative ECT problems. The obtained numerical results are validated against analytic solutions, other simulation codes, and experimental data.The inverse problem of interpreting measured ECT data is also a significant challenge in many practical applications. Very often, the defect indication in a measurement is very subtle due to the large contribution from the geometry of the test sample, making defect detection very difficult. This thesis presents a novel approach to address this problem. The developed algorithm is applied to real problems of detecting defects under steel fasteners in aircraft geometry using 2D data obtained from a raster scan of a multilayer structure with a low frequency eddy current excitation and GMR (Giant Magnetoresistive) sensors. The algorithm is also applied to the data obtained from EC inspection of heat exchange tubes in nuclear power plant.
Book Synopsis Optimization of In-line Defect Detection by Eddy Current Techniques by : Mehbub-Ur Rahman
Download or read book Optimization of In-line Defect Detection by Eddy Current Techniques written by Mehbub-Ur Rahman and published by kassel university press GmbH. This book was released on 2011 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite-element Modeling of Eddy-current Probe for NDE of Steam Generator Tubes by :
Download or read book Finite-element Modeling of Eddy-current Probe for NDE of Steam Generator Tubes written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electromagnetic Non-Destructive Evaluation (XXIII) by : G.Y. Tian
Download or read book Electromagnetic Non-Destructive Evaluation (XXIII) written by G.Y. Tian and published by IOS Press. This book was released on 2020-11-03 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Non-destructive Evaluation (ENDE) is an invaluable, non-invasive diagnostic tool for the inspection, testing, evaluation and characterization of materials and structures. It has now become indispensible in a number of diverse fields ranging from biomedics to many branches of industry and engineering. This book presents the proceedings of the 24th International Workshop on Electromagnetic Nondestructive Evaluation, held in Chengdu, China from 11 - 14 September 2019. The 38 peer-reviewed and extended contributions included here were selected from 45 original submissions, and are divided into 7 sections: eddy current testing and evaluation; advanced sensors; analytical and numerical modeling; material characterization; inverse problem and signal processing; artificial intelligence in ENDE; and industrial applications of ENDE. The papers cover recent studies concerning the progress and application of electromagnetic (EM) fields in the non-destructive examination of materials and structures, and topics covered include evaluations at a micro-structural level, such as correlating the magnetic properties of a material with its grain structure, and a macroscopic level, such as techniques and applications for EM NDT&E. Recent developments and emerging materials such as advanced EM sensors, multi-physics NDT&E, intelligent data management and maintaining the integrity of structures are also explored. The book provides a current overview of developments in ENDE, and will be of interest to all those working in the field.
Book Synopsis Electromagnetic Nondestructive Evaluation (IX) by : Lalita Udpa
Download or read book Electromagnetic Nondestructive Evaluation (IX) written by Lalita Udpa and published by IOS Press. This book was released on 2005 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Nondestructive Evaluation has grown considerably in recent years largely due to advances in sensor technology, computational modeling and data analysis techniques. This publication discusses developments in numerical simulation of physical phenomena associated with electromagnetic NDE methods, new electromagnetic sensors, signal and image processing techniques and inverse solutions to NDE problems. Electromagnetic Nondestructive Evaluation (IX) emphasizes basic science and early engineering developments in the field, as well as practical application of emerging technologies to problems of direct relevance to industry. The book contains thirty-six technical papers, covering topics on modeling, (forward and inverse problems), new inspection methods, materials characterization, signal processing and applications.
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Book Synopsis Eddy Current Inspection of Graphite Fiber Components by :
Download or read book Eddy Current Inspection of Graphite Fiber Components written by and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
