Effects of Temperature and Time on Aircraft and Missile Structures PDF Download
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Author: Stanford University. Department of Aeronautical Engineering
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
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Book Description
A survey is made of the new problems introduced in the structural analysis of airplanes and missiles by the high temperatures caused by aerodynamic heating. Thermal stresses, thermal buckling, the effect of creep on stress distribution and stability, and ablation are discussed and special attention is paid to the behavior of the pure shells used in missiles. It is concluded that the modern structural analyst must acquire a knowledge of many disciplines that were of no interest to his predecessor working before World War II. Among these disciplines are thermodynamics, metallurgy, and the physics of the solid state. In all the new problems two parameters appear that did not enter classical structural analysis. The first is temperature which is the cause of all the difficulties of the modern structural designer and analyst. The second is time, because at high temperatures no structure can carry loads for indefinitely long periods. One of the most important tasks of the analyst of missiles is the determination of the lifetime of the structure. (Author).
Author: Stanford University. Department of Aeronautical Engineering
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
Get Book Here
Book Description
A survey is made of the new problems introduced in the structural analysis of airplanes and missiles by the high temperatures caused by aerodynamic heating. Thermal stresses, thermal buckling, the effect of creep on stress distribution and stability, and ablation are discussed and special attention is paid to the behavior of the pure shells used in missiles. It is concluded that the modern structural analyst must acquire a knowledge of many disciplines that were of no interest to his predecessor working before World War II. Among these disciplines are thermodynamics, metallurgy, and the physics of the solid state. In all the new problems two parameters appear that did not enter classical structural analysis. The first is temperature which is the cause of all the difficulties of the modern structural designer and analyst. The second is time, because at high temperatures no structure can carry loads for indefinitely long periods. One of the most important tasks of the analyst of missiles is the determination of the lifetime of the structure. (Author).
Author: Nicholas John Hoff
Publisher:
ISBN:
Category : Aerodynamic heating
Languages : en
Pages : 88
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Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1216
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Book Description
Author: United States. Wright Air Development Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1580
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 912
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309061423
Category : Technology & Engineering
Languages : en
Pages : 76
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Book Description
This study was undertaken in response to a request by the U.S. Air Force that the National Research Council (NRC) examine whether the technologies that underlie the concept of a hypersonic, air-launched, air-breathing, hydrocarbon-fueled missile with speeds up to Mach 81 can be demonstrated in time to be initially operational by 2015. To conduct the study, the NRC appointed the Committee on Review and Evaluation of the Air Force Hypersonic Technology Program, under the auspices of the Air Force Science and Technology Board.
Author: Frederic R. Shober
Publisher:
ISBN:
Category : Metals
Languages : en
Pages : 120
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Book Description
The effect of fast-neutron (>1 Mev) irradiation on the mechanical properties of structural metals and alloys was studied. Although the yield strengths and ultimate tensile strengths are increased su stantially for most materials, the ductility suffers severe decreases. This report presents these changes in properties of several structural metals for a number of neutron exposures within the 1.0 x 10 to the 18th power to 5.0 x 10 to the 21st power n/sq cm range. Data summarizing these effects on several classes of materials such as carbon steels, low-alloy steels, stainless steels, Zr-base alloys, ni-base alloys, Al-base alloys, and Ta are given. Additional data which show the influence f irradiation temperatures and of post-irradiation annealing on the radiation-induced property changes are also given and discussed. Increases as great as 175% in yield strength, 100% in ultimate strength, and decreases of 80% in total elongation are reported for fast-neutron exposures as great as 5 10 to the 21st power n/sq cm. (Author).
Author: Lewis H. Abraham
Publisher:
ISBN:
Category : Rockets (Aeronautics)
Languages : en
Pages : 360
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Book Description
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 608
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309174473
Category : Technology & Engineering
Languages : en
Pages : 124
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Book Description
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.
