Download or read book A New Method of Detecting Fatigue Crack Propagation in Ferromagnetic Specimens written by S. Bhattacharya and published by . This book was released on 1975 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a new method for detecting fatigue crack growth in ferromagnetic specimens. This method is similar to the Barkhausen effect type of measurement, where discontinuous voltage pulses are induced in a pickup coil surrounding a specimen when the specimen is magnetized slowly. As a fatigue crack grows, similar voltage pulses are generated. Simultaneous display of the Barkhausen-type magnetic signals and the acoustic emission signals during fatigue crack propagation show that they are correlated.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Journal of Testing and Evaluation written by and published by . This book was released on 1975 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Magnetic Field on Fatigue Crack Propagation of Single Edge Cracked Soft Ferromagnetic Specimens Under Mode I Loading written by Y. Shindo and published by . This book was released on 2007 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper is to investigate the effect of magnetic field on the fatigue crack growth behavior of nickel iron soft ferromagnetic materials under Mode I loading.Fatigue crack growth tests were conducted using single-edge cracked tension specimens in a magnetic field, and the effects of magnetic field and loading condition on the crack growth rates were examined.Magnetic field effect on the stress intensity factor range also was discussed for a single-edge cracked soft ferromagnetic strip.The fracture surfaces were examined by scanning electron microscopy to correlate with fatigue characteristics.
Download or read book Fatigue Crack Detection Methods Part 2 Review of Experimental Data on the Initiation and Propagation of Fatigue Cracks in Test Specimens written by L. J. DEMER and published by . This book was released on 1955 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1976 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Crack Measurement written by Kenneth James Marsh and published by . This book was released on 1991 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties written by and published by . This book was released on 1976 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1989 with total page 1440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Detection of Fatigue Cracks by Nondestructive Testing Methods written by Ward D. Rummel and published by . This book was released on 1974 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-RADIOGRAPHIC, PENETRANT, ULTRASONIC, EDDY CURRENT, HOLOGRAPHIC, AND ACOUSTIC EMISSION TECHNIQUES WERE OPTIMIZED AND APPLIED TO THE EVALUATION OF 2219-T87 ALUMINUM ALLOY TEST SPECIMENS. ONE HUNDRED EIGHTEEN SPECIMENS CONTAINING A TOTAL OF 328 FATIGUE CRACKS WERE EVALUATED. THE CRACKS RANGED IN LENGTH FROM 0.500 INCH (1.27 CM) TO 0.007 INCH (0.018 CM) AND IN DEPTH FROM 0.178 INCH (0.451 CM) AND 0.001 INCH (0.003 CM). SPECIMEN THICKNESSES WERE NOMINALLY 0.060 INCH (0.152 CM) AND 0.210 INCH (0.532 CM) AND SURFACE FINISHES WERE NOMINALLY 32 AND 125 RMS AND 64 AND 200 RMS RESPECTIVELY. SPECIMENS WERE EVALUATED IN THE 'AS-MILLED' SURFACE CONDITION, IN THE CHEMICALLY MILLED SURFACE CONDITION AND, AFTER PROOF LOADING, IN A RANDOMIZED INSPECTION SEQUENCE. RESULTS OF THE NONDESTRUCTIVE TEST (NDT) EVALUATIONS WERE COMPARED WITH ACTUAL CRACK SIZE OBTAINED BY MEASUREMENT OF THE FRACTURED SPECIMENS. INSPECTION DATA WERE THEN ANALYZED TO PROVIDE A STATISTICAL BASIS FOR DETERMINING THE THRESHOLD CRACK DETECTION SENSITIVITY (THE LARGEST CRACK SIZE THAT WOULD BE MISSED) FOR EACH OF THE INSPECTION TECHNIQUES AT A 95% PROBABILITY AND 95% CONFIDENCE LEVEL.
Download or read book Acoustic Emission written by Thomas F. Drouillard and published by Springer. This book was released on 1979-03 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this bibliography is to list all of the known literature on acoustic emission in a single volume. The bibliography is intended to serve as a reference to the literature for those interested in the acoustic emission phenomenon, for those engaged in materials research, and for those interested in applying acoustic emission as a nonde structive testing method. It provides an invaluable reference to source materiaf for both undergraduate and graduate students interested in the subjects of acoustic emission, microseismic activity, and nondestructive testing. In addition, it provides a vaIuable desk-top reference for engineers and scientists in the fields of pressure vessel design and maintenance, stress analysis, mechanical engineering, welding engineering, nuclear engineering, metallurgy, and quality control. In compiling the bibliography every effort was made to search the literat ure for all the publications and obtain copies, index them, and publish a complete, com prehensive bibliography of the literature on acoustic emission. This bibliography is the most complete ever published. It includes essentially all of the literature on acoustic emission that has ever been published up through the first quarter of 1977. Publications listed are in the form of technical reports and memoranda, journal articles, technical presentations, proceedings, doctoral, master, and bachelor theses, patents, bound volumes, translations, and newspaper articles. Some references, however, are not technical articles, but consist of editorials or staff-written journal articles which are included because they represent apart of the literature.
Download or read book Five year Index to ASTM Technical Papers and Reports written by American Society for Testing and Materials and published by . This book was released on 1971 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Evaluation written by and published by . This book was released on 1996 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Abstracts written by and published by . This book was released on 1981 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the Effects of Manufacturing Variations and Materials on Fatigue Crack Detection Methods in Gear Teeth written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-18 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue life of a gear tooth can be thought of as the sum of the number of cycles required to initiate a crack, N(sub i), plus the number of cycles required to propagate the crack to such a length that fracture occurs, N(sub p). The factors that govern crack initiation are thought to be related to localized stress or strain at a point, while propagation of a fatigue crack is a function of the crack tip parameters such as crack shape, stress state, and stress intensity factor. During a test there is no clear transition between initiation and propagation. The mechanisms of initiation and propagation are quite different and modeling them separately produces a higher degree of accuracy, but then the question that continually arises is 'what is a crack?' The total life prediction in a fracture mechanics model presently hinges on the assumption of an initial crack length, and this length can significantly affect the total life prediction. The size of the initial crack is generally taken to be in the range of 0.01 in. to 0.2 in. Several researchers have used various techniques to determine the beginning of the crack propagation stage. Barhorst showed the relationship between dynamic stiffness changes and crack propagation. Acoustic emissions, which are stress waves produced by the sudden movement of stressed materials, have also been successfully used to monitor the growth of cracks in tensile and fatigue specimens. The purpose of this research is to determine whether acoustic emissions can be used to define the beginning of crack propagation in a gear using a single-tooth bending fatigue test. Wheitner, Jeffrey A. and Houser, Donald R. Unspecified Center ACOUSTIC EMISSION; ACOUSTIC MEASUREMENT; BENDING FATIGUE; CRACK PROPAGATION; FATIGUE LIFE; FATIGUE TESTING MACHINES; FRACTURE MECHANICS; GEAR TEETH; NONDESTRUCTIVE TESTS; BEND TESTS; CRACKS; DETECTION; FATIGUE TESTS; STIFFNESS; STRESS WAVES...
Download or read book Metal Magnetic Memory Technique and Its Applications in Remanufacturing written by Haihong Huang and published by Springer Nature. This book was released on 2021-05-10 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the metal magnetic memory (MMM) technique, one of the nondestructive testing methods, and its applications in remanufacturing engineering. It discusses the advantages of MMM and how to evaluate the early damage degree of remanufacturing cores, as well as the repairing quality of remanufactured components. Various MMM signal characteristics are extracted to reflect the damage degree of remanufacturing cores, coatings and interfaces. All the theoretical models, analysis methods and testing results of MMM in this book provide guidance to control the quality of remanufactured parts and products. This book can help readers make the best use of the MMM technique in remanufacturing engineering.
Download or read book Fatigue and Fracture of Materials and Structures written by Grzegorz Lesiuk and published by Springer Nature. This book was released on 2022-05-09 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected contributions from ICMFM XX and the Polish National Conference—KKMP. The XX International Colloquium on Mechanical Fatigue of Metals (ICMFM XX) was organized on 15–17 September 2021, in the Faculty of Mechanical Engineering of the Wroclaw University of Science and Technology, in Wrocław City, Poland, in a remote form. Its aim was to facilitate and encourage the exchange of knowledge and experiences among the different communities involved in both basic and applied research in the field of fatigue of metals, looking at the problem of fatigue from a multiscale perspective, and exploring analytical and numerical simulative approaches, without losing the perspectives of the application. The Polish National Conference—KKMP 2021—was organized remotely with 50–80 prominent international participants from the fracture mechanics community.
