Characterization Of Cracking And Crack Growth Properties Of The C5a Aircraft Tie Box Forging PDF Download
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Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 36 |
Release | : 2018-08-27 |
Genre | : |
ISBN | : 9781726238670 |
Download Characterization of Cracking and Crack Growth Properties of the C5a Aircraft Tie-box Forging Book in PDF, ePub and Kindle
Detailed destructive examinations were conducted to characterize the integrity and material properties of two aluminum alloy (7075-T6) horizontal stabilizer tie box forgings removed.from US. Air Force C5A and C5B transport aircraft. The C5B tie box forging was, found to contain no evidence of cracking. Thirteen cracks were found in the CSA, forging. All but one of the cracks observed in the C5A component were located along the top cap region (one crack was located in the bottom cap region). The cracks in the C5A component initiated at fastener holes and propagated along a highly tunneled intergranular crack path. The tunneled crack growth configuration is a likelv result of surface compressive stress produced during peening of the .forging suijace. The tie box forging, fatigue crack growth, fracture and stress corrosion cracking (SCC) properties were characterized. Reported herein are the results of laboratory air, fatigue crack growth tests and 95% relative humidity SCC tests conducted using specimens machined from the C5A, forging. SCC test results revealed that the C5A, forging material was susceptible to intergranular environmental assisted cracking: the C5A forging material exhibited a SCC crack-tip stress-intensity factor threshold of less than 6 MPadn. Fracture toughness tests revealed that the C5A forging material exhibited a fracture toughness that was 25% less than the C5B forging. The C5A forging exhibited rapid laboratory air fatigue crack growth rates having a threshold crack-tip stress-intensity factor range of less than 0.8 MPa sup m. Detailed fractographic examinations revealed that the, fatigue crack intergranular growth crack path was similar to the cracking observed in the C5A tie box forging. Because both fatigue crack propagation and SCC exhibit similar intergranular crack path behavior, the damage mechanism resulting in multi-site cracking of tie box forgings cannot be determined unless local cyclic stresses can be quantified.Piascik, Robert S. a.
Author | : |
Publisher | : |
Total Pages | : 38 |
Release | : 2003 |
Genre | : |
ISBN | : |
Download Characterization of Cracking and Crack Growth Properties of the C5A Aircraft Tie-Box Forging Book in PDF, ePub and Kindle
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 124 |
Release | : 1997-09-30 |
Genre | : Technology & Engineering |
ISBN | : 0309174473 |
Download Aging of U.S. Air Force Aircraft Book in PDF, ePub and Kindle
Many of the aircraft that form the backbone of the U.S. Air Force operational fleet are 25 years old or older. A few of these will be replaced with new aircraft, but many are expected to remain in service an additional 25 years or more. This book provides a strategy to address the technical needs and priorities associated with the Air Force's aging airframe structures. It includes a detailed summary of the structural status of the aging force, identification of key technical issues, recommendations for near-term engineering and management actions, and prioritized near-term and long-term research recommendations.
Author | : J. P. Gallagher |
Publisher | : |
Total Pages | : 1380 |
Release | : 1984 |
Genre | : Airframes |
ISBN | : |
Download USAF Damage Tolerant Design Handbook Book in PDF, ePub and Kindle
The handbook provides specific background data and justification for the detailed requirements of MIL-A-83444 and provides guidelines and state-of-the-art analysis methods to assist contractor and USAF personnel in complying with the intent of the specification and in solving cracking problems, in general, for metallic aircraft structures. Cf. Report Documentation Page.
Author | : United States. Naval Air Systems Command |
Publisher | : |
Total Pages | : 360 |
Release | : 1966 |
Genre | : |
ISBN | : |
Download Fatigue of Aircraft Structures Book in PDF, ePub and Kindle
Author | : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel. Meeting |
Publisher | : |
Total Pages | : 228 |
Release | : 1995 |
Genre | : Airframes |
ISBN | : |
Download Widespread Fatigue Damage in Military Aircraft Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 826 |
Release | : 1993-10 |
Genre | : Ceramic materials |
ISBN | : |
Download Engineered Materials Abstracts Book in PDF, ePub and Kindle
Author | : Franz Roters |
Publisher | : John Wiley & Sons |
Total Pages | : 188 |
Release | : 2011-08-04 |
Genre | : Technology & Engineering |
ISBN | : 3527642099 |
Download Crystal Plasticity Finite Element Methods Book in PDF, ePub and Kindle
Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.
Author | : Jean F. Bussière |
Publisher | : Springer Science & Business Media |
Total Pages | : 750 |
Release | : 2013-03-14 |
Genre | : Technology & Engineering |
ISBN | : 1468453386 |
Download Nondestructive Characterization of Materials II Book in PDF, ePub and Kindle
The possibility of nondestructively characterizing the microstruc ture, morphology or mechanical properties of materials is certainly a fascinating subject. In principle, such techniques can be used at all stages of a material's life - from the early stages of processing, to the end of a structural component's useful life. Interest in the subject thus arises not only from a purely scientific point of view but is also strongly motivated by economic pressures to improve productivity and quality in manufacturing, to insure the reliability and extend the life of existing structures. The present volume represents the edited papers presented at the Second International Symposium on the Nondestructive Characterization of Materials, held in Montreal, Canada, July 21-23, 1986. The Proceedings are divided into eight sections, which reflect the multidisciplinary nature of characterizing materials nondestructively: Polymers and Composites, Ceramics and Powder Metallurgy, Metals, Layered Structures/Adhesive Bonds/Welding, Degradation/Aging, Texture/ Anisotropy, Stress, and New Techniques. Invited papers by R. Hadcock of Grumman Aircraft Systems, R. Cannon of Rutgers University, H. Yada of Nippon Steel and R. Bridenbaugh of Alcoa review respectively the processing of polymer matrix composites, ceramics, steel and aluminum, emphasizing the need for material property sensors to improve process and quality control. Two other invited papers, one by A. Wedgwood of Harwell and the other by P. Holler of the IzFP in Saarbrucken review state of the art techniques to characterize particulate matter and metals respectively.
Author | : Edgar F. Raines |
Publisher | : Government Printing Office |
Total Pages | : 396 |
Release | : 2000 |
Genre | : Aerial observation (Military science) |
ISBN | : |
Download Eyes of Artillery Book in PDF, ePub and Kindle