Download or read book Eddy Current Detection of Pitting Corrosion Around Fastener Holes written by J. H. Heida and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eddy Current Crack Detection Around Fastener Holes in Multilayer Structures written by Jeremy Scott Knopp and published by . This book was released on 2005 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multifrequency Eddy Current Detection of Cracks at Fastener Holes with the Fastener Installed written by H. Monty O'Connor and published by . This book was released on 1983 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Eddy Current Scanning Method for the Detection of Corrosion Under Fasteners in Thick Skin Aircraft Structures written by Brian A. Lepine and published by . This book was released on 1997 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multifrequency Eddy Current Inspection for Cracks Under Fasteners written by J. H. Flora and published by . This book was released on 1976 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental evaluation was conducted on two typical wing splice joint configurations used in the C5-A aircraft consisting of two aluminum layers each 3/16 to 1/4 inches thick. Notches simulating cracks were machined in a radial direction extending from the fastener hole and the faying surface between sheets. A digital eddy-current system designed around a PDP-11/40 minicomputer was utilized for the experimental evaluations. The digital system was programmed to generate the signal wave-forms that excite the test coil and perform the function of phase-sensitive detection of response signals that are received from the test coil. Special test coils were designed to induce eddy currents in the aluminum alloy that lies beneath the head of the fasteners. A series of measurements were taken on the wing-splice samples at various frequencies, excitation levels, and phase settings. These data were analyzed using the Automatic Interaction Detector, AID, computer code to indicate initial capabilities of crack detection, and to compare the various operating parameters such as excitation frequency and test coil design.
Download or read book Model Assisted Probability of Detection Validation of Eddy Current Inspection for Cracks in Lap Splice Fastener Holes written by and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Pulsed Eddy Current Instrument for Corrosion Detection written by Sunil Kumar Shaligram and published by . This book was released on 1996 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Process Specification for Eddy Current Inspection written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-18 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This process specification establishes the minimum requirements for eddy current inspection of flat surfaces, fastener holes, threaded fasteners and seamless and welded tubular products made from nonmagnetic alloys such as aluminum and stainless steel. Koshti, Ajay Johnson Space Center JSC-CN-34649
Download or read book Eddy Current Inspection of Open Fastener Holes in Aluminum Aircraft Structure written by and published by . This book was released on 2007 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Eddy Current Techniques for the Inspection of Gun Tube Bore Evacuator Holes written by Alfred Landman and published by . This book was released on 1986 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A commercially built multiple-frequency eddy current system, with several commercially available bolt-hole probes, was used to detect EDM slots in a section of 120-mm gun tube in which holes were drilled to simulate bore evacuator holes. The experiments performed demonstrated the possibility of slot or crack detection with these defects originating at the hole-surface interface. However, defect characterization and inspection by this method does not appear feasible. (Author).
Download or read book Generic Bolt Hole Eddy Current Testing Probability of Detection written by Catalin Mandache and published by . This book was released on 2007 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improved Low Frequency Eddy Current Inspection for Cracks Under Installed Fasteners written by D. T. Mih and published by . This book was released on 1980 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this program was to establish the feasibility of using low frequency eddy current (LFEC) techniques to inspect the second layer of a built up aluminum structure for hole cracking, with the titanium fasteners installed. This program pursued two parallel approaches for low frequency eddy current inspection. One approach was with centered field excitation in the fastener hole. The second approach was with off-center field excitation in the fastener hole. The program consisted of two tasks. The first task was to optimize the probes for both approaches, and involved analysis, design, optimization of probes, and testing of various unique driver/sensor combinations. The second task was to develop inspection techniques with the optimized probes on notched specimens containing flush-head titanium fasteners with appropriate signal processing and display. It has been shown that it is feasible and practical to use LFEC multisegment or circular array probe to detect 0.1 inch radial depth notch underneath 0.25 inch thick aluminum alloy skin, with titanium fasteners in place. (Author).
Download or read book The Development and Evaluation of an Automated Eddy Current Fastener Hole Scanner written by W. H. THOMPSON and published by . This book was released on 1974 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: UNDER AUTHORITY OF THE AIR FORCE, TWO PROTOTYPE AUTOMATIC EDDY CURRENT SCANNERS WERE DEVELOPED. THE COMPLETED UNITS WERE CAPABLE OF INSPECTING HOLES AS LARGE AS 1 INCH IN DIAMETER AND 4 INCHES DEEP AND AS SMALL AS 5/32 INCH IN DIAMETER WITH A DEPTH OF .050 INCH. INSPECTION OF FATIGUE DAMAGED STRUCTURAL MEMBERS HAS SHOWN THAT CRACKS WITH A SURFACE LENGTH AS SMALL AS .0085 INCH CAN BE DETECTED AND THAT CRACKS WITH A SURFACE LENGTH OF .050 INCH CAN BE DETECTED 90 PERCENT OF THE TIME WITH A 95 PERCENT CONFIDENCE LEVEL. WHERE LAYERS OF MATERIALS ARE PARALLEL, THE CRACK SIZE FOR THE SAME DEGREE OF RELIABILITY WOULD DECREASE.
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:
Download or read book Inspection Reliability of a Nortec 30 Eddyscan System written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liddy Peter written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reviews on Coatings and Corrosion written by and published by . This book was released on 1978 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
