Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Direct Real Time Observations Of Fatigue Crack Growth By Field Emission Type Scanning Electron Microscope
Download Direct Real Time Observations Of Fatigue Crack Growth By Field Emission Type Scanning Electron Microscope full books in PDF, epub, and Kindle. Read online Direct Real Time Observations Of Fatigue Crack Growth By Field Emission Type Scanning Electron Microscope ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Direct Real-time Observations of Fatigue Crack Growth by Field Emission Type Scanning Electron Microscope by : M Jono
Download or read book Direct Real-time Observations of Fatigue Crack Growth by Field Emission Type Scanning Electron Microscope written by M Jono and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic, Real-Time Fatigue Crack Propagation at High Resolution as Observed in the Scanning Electron Microscope by : DL. Davidson
Download or read book Dynamic, Real-Time Fatigue Crack Propagation at High Resolution as Observed in the Scanning Electron Microscope written by DL. Davidson and published by . This book was released on 1979 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A videotape of dynamic, high-resolution, real-time fatigue crack propagation, made from experiments with a special cyclic loading stage in the scanning electron microscope, was shown to the conference attendees. This paper briefly summarizes the video presentation and illustrates a few of the main points made by it.
Book Synopsis Mechanical Behaviour of Materials - VI by : M. Jono
Download or read book Mechanical Behaviour of Materials - VI written by M. Jono and published by Elsevier. This book was released on 2013-10-22 with total page 3510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant progress in the science and technology of the mechanical behaviour of materials has been made in recent years. The greatest strides forward have occurred in the field of advanced materials with high performance, such as ceramics, composite materials, and intermetallic compounds. The Sixth International Conference on Mechanical Behaviour of Materials (ICM-6), taking place in Kyoto, Japan, 29 July - 2 August 1991 addressed these issues. In commemorating the fortieth anniversary of the Japan Society of Materials Science, organised by the Foundation for Advancement of International Science and supported by the Science Council of Japan, the information provided in these proceedings reflects the international nature of the meeting. It provides a valuable account of recent developments and problems in the field of mechanical behaviour of materials.
Book Synopsis Direct Observation and Mechanism of Fatigue Crack Propagation by : M. Adachi
Download or read book Direct Observation and Mechanism of Fatigue Crack Propagation written by M. Adachi and published by . This book was released on 1979 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue crack propagation tests were carried out by using a specially designed testing apparatus in a scanning electron microscope. A grain-oriented silicon iron was used as a testing material and it was found that a nearly plane-strain state could be realized up to the specimen surface by selection of the loading axis to the specific orientation of the material. From the sequential observations of crack opening and closure behavior the mechanism of fatigue crack propagation by Mode I opening was confirmed to be an alternating slipping-off process at the crack-tip apex.
Book Synopsis Life Assessment of Dynamically Loaded Materials and Structures by : L. O. Faria
Download or read book Life Assessment of Dynamically Loaded Materials and Structures written by L. O. Faria and published by . This book was released on 1985 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue 90 written by and published by . This book was released on 1990 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparison of Fatigue Crack Growth Rates as Determined by Striation Measurements and by Observations of Crack Length on the Specimen Surface During the Test by : D. W. Cruickshanks-Boyd
Download or read book A Comparison of Fatigue Crack Growth Rates as Determined by Striation Measurements and by Observations of Crack Length on the Specimen Surface During the Test written by D. W. Cruickshanks-Boyd and published by . This book was released on 1976 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue striation spacings have been measured on DTD 5050 test pieces that had been tested at stress ratios of 0.05 and 0.65. Crack growth rate curves were obtained from these measurements and compared with those produced by the direct measurement of crack length as seen on the specimen surface. The aim was to establish what errors in the general growth rate might be expected from the fractographic method. The use of cellulose-acetate-carbon two stage replication gave consistently low growth rates whereas the scanning electron microscope gave good agreement with the direct method up to rates of 0.6 micrometers/cycle. Above this rate striation measurements underestimate because of the contribution of local tensile tearing.
Download or read book Kagaku Shōhō written by and published by . This book was released on 1986 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin of the JSME. by : Nihon Kikai Gakkai
Download or read book Bulletin of the JSME. written by Nihon Kikai Gakkai and published by . This book was released on 1986 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Technical Abstracts written by and published by . This book was released on 1987 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relating Fatigue Crack Growth to Microstructure Via Multiscale Digital Image Correlation by : Jay D. Carroll
Download or read book Relating Fatigue Crack Growth to Microstructure Via Multiscale Digital Image Correlation written by Jay D. Carroll and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigates fatigue crack growth at multiple scales and links material deformation to microstructural properties. The optical technique of digital image correlation (DIC) is well suited for this task since it provides quantitative full-field deformation measurements at multiple length scales. The first part of this work introduces two DIC-based techniques for measuring fatigue crack closure levels and demonstrates them on titanium. At the macroscale, a least squares regression was performed on full field measurements of displacement near the crack tip. At the microscale, two-point virtual extensometers were placed on the crack flanks behind the crack tip. These two measurement techniques provided crack closure level measurements from multiple scales that were consistent with one another. In the second part of this work, fatigue crack growth was observed in a nickel based superalloy, Hastelloy X, at the grain level. A novel high resolution ex situ DIC technique was developed and used to measure accumulated strain fields in the plastic wake of a fatigue crack. Additionally, the evolution of the strain field as the fatigue crack grew through the imaging region was captured using an in situ real time DIC technique. Finally, these strain fields (from both ex situ and in situ measurements) were related to microstructural geometry and orientation obtained through electron backscatter diffraction (EBSD). By linking accumulated fatigue strain to microstructure, a deeper understanding of fatigue crack growth was obtained. Plastic deformation in fatigue crack growth was found to follow lobes of high strain that emanate from the crack tip at angles of 45°. These lobes leave behind an inhomogeneous strain field in which slip bands and strain localizations on grain boundaries were observed. Fatigue crack growth was observed to be transgranular following lines of slip bands as dictated by global loading and local microstructure.
Download or read book Translations Index written by and published by . This book was released on 1989-08 with total page 48 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 1993 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Compressive Residual Stress on the Crack-Opening Behavior of Part-Through Fatigue Cracks by : JE. Hack
Download or read book Influence of Compressive Residual Stress on the Crack-Opening Behavior of Part-Through Fatigue Cracks written by JE. Hack and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct observations of the surface crack opening displacement (SCOD) of surface and corner fatigue cracks were made on samples of Ti-6Al-4V under both cyclic and static loading conditions. The experiments were conducted in situ in a scanning electron microscope. Results show that surface residual stresses can significantly affect crack opening behavior--thus crack growth behavior--even when the crack has grown well beyond the zone of residual stress. An analytical approach was developed and used to predict SCOD for Mode I part-through cracks based on crack geometry and the boundary integral technique. Correlation with independent results for macrocracks and values for microcracks measured in this program are excellent for the case of zero residual stress. The analytical approach is currently being extended to more accurately account for the presence of residual stress gradients.
Book Synopsis Fatigue Crack Initiation as Viewed by Scanning Electron Microscopy by : William A. Wood
Download or read book Fatigue Crack Initiation as Viewed by Scanning Electron Microscopy written by William A. Wood and published by . This book was released on 1970 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is pointed out that high internal stress, commonly regarded as necessary for initiating fracture by unidirectional deformation of a metal, does not seem essential to crack initiation by cyclic deformation of fatigue. An alternative whereby fatigue cracking can be started simply by the geometry of slip movement is generalized. The hypothesis was tested by the recently developed scanning electron-microscope for copper and aluminum specimens subjected to large amplitudes of cyclic strain (torsion), which gives a generalized type of slip movement. This technique in broadly confirming the hypothesis brings out striking forms of initial fatigue damage. (Author).
Book Synopsis Study on the Effect of the Environment on Internal Fatigue Crack Propagation in Ti-6Al-4V by : Louis Hébrard
Download or read book Study on the Effect of the Environment on Internal Fatigue Crack Propagation in Ti-6Al-4V written by Louis Hébrard and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Very High Cycle Fatigue regime (fatigue lives longer than 1e7 cycles), fatigue cracks tend to initiate internally. This makes visual detection impossible during maintenance operations. Consequently, engineers need robust fatigue datasets to prevent such internal crack initiations that may lead to the fracture of a critical part. To obtain such data, in-situ experimental techniques are developed. In particular, micro-computed tomography allows to acquire direct images of internal fatigue cracks. In this study, a combination of in-situ micro-tomography and ultrasonic fatigue cycling has been applied to specimens that contain an internal sharp notch to study the propagation of internal fatigue cracks. More precisely, the crack shape of internal fatigue cracks has been monitored in 3D at different instants of their propagation up to the Very High Cycle Fatigue regime. Some internal notches have been linked to the specimen surface given access to the ambient atmosphere. This was done to study the influence of the environment on internal fatigue cracks. This experimental procedure allowed to acquire for the first time, in-situ observations of internal fatigue cracks propagating with and without air in a Ti64 alloy. Temperature measurements were also carried out to evaluate the effect of the environment on the plasticity at the crack tip. Finally, the fatigue data obtained at ultrasonic frequencies allowed to evaluate the influence of the cycling frequency on the crack growth rates.
