A Survey Report on Fatigue in Cannon Bores
Author | : Horace John Grover |
Publisher | : |
Total Pages | : 24 |
Release | : 1967 |
Genre | : Fracture mechanics |
ISBN | : |
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Author | : Horace John Grover |
Publisher | : |
Total Pages | : 24 |
Release | : 1967 |
Genre | : Fracture mechanics |
ISBN | : |
Author | : Horace John Grover |
Publisher | : |
Total Pages | : 28 |
Release | : 1968 |
Genre | : Materials |
ISBN | : |
The Defense Metals Information Center conducted a brief survey of the present state of knowledge about fatigue with wide coverage to applications and with particular emphasis on means of early detection of fatigue damage. The survey has excluded consideration of reports of proprietary interest and of reports with security classification. However, it has included information from various branches of the U.S. Army, the U.S. Navy, the U.S. Air Force, and the National Aeronautics and Space Administration. The results of such considerations as have been possible are described in the following pages with the objectives of: (1) Delineating the current state of knowledge; (2) Indicating some of the current research toward increasing this knowledge; and (3) Pointing out areas where further work seems desirable. (Author).
Author | : |
Publisher | : |
Total Pages | : 27 |
Release | : 1999 |
Genre | : |
ISBN | : |
Benet Laboratories has the responsibility for safe fatigue life (durability) testing of cannon system components. This safe fatigue or service life evaluation is accomplished by conducting constant amplitude fatigue testing in a laboratory setting. One such cannon component that requires testing is the gun tube. After each tube has received the required number of live fire rounds necessary to generate initial cracking at the bore surface (also known as heat-check cracking), it is brought to the laboratory for final hydraulic fatigue testing. A sample size of two 155-mm M776 gun tubes was hydraulically fatigue tested to failure at Benet Laboratories to assist in determining the safe fatigue life for the weapon. This report contains the results of the fatigue tests conducted on the subject tubes, including material inspections, failure lives, and the resulting value for safe fatigue life of the XM776 gun tube.
Author | : Defense Metals Information Center |
Publisher | : |
Total Pages | : 498 |
Release | : 1968 |
Genre | : Metallurgy |
ISBN | : |
Author | : J. Y. Mann |
Publisher | : Elsevier |
Total Pages | : 520 |
Release | : 2013-09-03 |
Genre | : Reference |
ISBN | : 1483191141 |
Bibliography on the Fatigue of Materials, Components and Structures, Volume 4: 1966 - 1969 presents the publications relevant to the study of materials science, particularly fatigue. The selection presents materials that cover fixed and mobile structures for use on land, sea and air; pressure vessels and nuclear reactors; mechanical components; and surgical implants. The publications presented tackle the developments in technological processes, evaluation of fatigue performance. The selection also covers the fundamental research on the subject and the development of theories. The book will be of great interest to students, researchers, and practitioner of materials science.
Author | : |
Publisher | : |
Total Pages | : 39 |
Release | : 1993 |
Genre | : |
ISBN | : |
Benet Laboratories has the responsibility for safe service life (fatigue) testing of cannon system components. This safe service life evaluation is accomplished by conducting constant amplitude fatigue tests using hydraulic oil as the pressurized medium, One such cannon component that requires testing is the gun tube. After each tube has received the required number of live fire rounds necessary to generate heat check cracking in the bore, it is brought to the laboratory for final hydraulic fatigue testing. A sample size of seven 155- mm M284 gun tubes was hydraulically fatigue tested to failure at Benet Laboratories to determine the safe service life for the weapon. This report contains the results of the fatigue tests conducted on the subject tubes, including material inspections, failure lives, and the resulting safe service life.
Author | : |
Publisher | : |
Total Pages | : 16 |
Release | : 2003 |
Genre | : |
ISBN | : |
Bauschinger-modified autofrettage residual stresses are used to improve the fatigue intensity factor model for fatigue life of cannon pressure vessels. Effects of yield strength and initial crack size are included with applied and residual stress. In an S-N description of cannon tube life that matches full-scale cannon fatigue test results with an R2 correlation of O.92. Thermally induced residual stress near the bore of a fired cannon is modeled by finite-difference calculations of temperature and mechanics calculations of transient thermal stress and resulting residual stress. Temperature-dependent thermal and physical properties are used, and the temperature distributions are validated by direct comparison with the known temperatures and the observed depths of microstructural damage and transformation in fired cannons. Calculations of fatigue life and yield pressure for a range of applied pressure, diameter ratio, yield strength, and percent autofrettage agree well with measurements frem full-scale cannons. Increased life is predicted for increases in yield strength and percent autofrettage, although the Bauschinger effect signiflcantiy reduces the amount of life Increase for autofrettage above 50%. The combined effects of mechanically Induced residual stress and thermally induced residual stress on cannon fatigue life are calculated, using an Increased initial crack size to account for thermal residual stress. Calculations of fatigue life are presented for a range of applied pressure and for selected gas temperatures.
Author | : |
Publisher | : |
Total Pages | : 588 |
Release | : 1973 |
Genre | : Logistics |
ISBN | : |
The official magazine of United States Army logistics.
Author | : B.L. Karihaloo |
Publisher | : Elsevier |
Total Pages | : 661 |
Release | : 2012-12-02 |
Genre | : Technology & Engineering |
ISBN | : 008098374X |
Fracture is a major cause of failure in metallic and non-metallic materials and structures. An understanding of the micro- and macro- mechanisms of fracture enables materials scientists to develop materials with high fracture resistance, which in turn helps engineers and designers to ensure the soundness and integrity of structures made from these materials. The International Congress on Fracture is held every four years and is an occasion to take stock of the major achievements in the broad field of fracture, to honour those who have made lasting contributions to this field, and to reflect on the future directions. ICF9 is published in six volumes covering the areas of:-- Failure Analysis, Remaining Life Assessment, Life Extension and Repair- Failure of Multiphase and Non-Metallic Materials- Fatigue of Metallic and Non-Metallic Materials and Structures- Theoretical and Computational Fracture Mechanics and New Directions- Testing and Characterization Methods, and Interfacial Fracture Mechanics- High Strain Rate Fracture and Impact Mechanics.