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Author : Charles E. Harris
Publisher : Unknown
Page : 42 pages
File Size : 43,7 Mb
Release : 2003
Category : Airframes
ISBN : NASA:31769000649072
Author : Reifsnider
Publisher : Unknown
Page : 128 pages
File Size : 52,6 Mb
Release : 2003-01-01
Category : Electronic
ISBN : 0471434019
Author : Kenneth L. Reifsnider,Scott W. Case
Publisher : Wiley-Interscience
Page : 470 pages
File Size : 43,6 Mb
Release : 2002-04-24
Category : Science
ISBN : UOM:39015054407625
A daring, original approach to understanding and predicting the mechanical behavior of materials "Damage is an abstraction . . . Strength is an observable, an independent variable that can be measured, with clear and familiar engineering definitions." -from the Preface to Damage Tolerance and Durability of Material Systems Long-term behavior is one of the most challenging and important aspects of material engineering. There is a great need for a useful conceptual or operational framework for measuring long-term behavior. As much a revolution in philosophy as an engineering text, Damage Tolerance and Durability of Material Systems postulates a new mechanistic philosophy and methodology for predicting the remaining strength and life of engineering material. This philosophy associates the local physical changes in material states and stress states caused by time-variable applied environments with global properties and performance. There are three fundamental issues associated with the mechanical behavior of engineering materials and structures: their stiffness, strength, and life. Treating these issues from the standpoint of technical difficulty, time, and cost for characterization, and relationship to safety, reliability, liability, and economy, the authors explore such topics as: * Damage tolerance and failure modes * Factors that determine composite strength * Micromechanical models of composite stiffness and strength * Stiffness evolution * Strength evolution during damage accumulation * Non-uniform stress states * Lifetime prediction With a robust selection of example applications and case studies, this book takes a step toward the fulfillment of a vision of a future in which the prediction of physical properties from first principles will make possible the creation and application of new materials and material systems at a remarkable cost savings.
Author : Sérgio M. O. Tavares,Paulo M. S. T. de Castro
Publisher : Springer
Page : 106 pages
File Size : 48,9 Mb
Release : 2018-08-06
Category : Technology & Engineering
ISBN : 9783319701905
This book provides a state-of-the-art review of the fail-safe and damage tolerance approaches, allowing weight savings and increasing aircraft reliability and structural integrity. The application of the damage tolerance approach requires extensive know-how of the fatigue and fracture properties, corrosion strength, potential failure modes and non-destructive inspection techniques, particularly minimum detectable defect and inspection intervals. In parallel, engineering practice involving damage tolerance requires numerical techniques for stress analysis of cracked structures. These evolved from basic mode I evaluations using rough finite element approaches, to current 3D modeling based on energetic approaches as the VCCT, or simulation of joining processes. This book provides a concise introduction to this subject.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 36 pages
File Size : 52,8 Mb
Release : 2018-08-27
Category : Electronic
ISBN : 1726176622
Aerospace vehicles are designed to be durable and damage tolerant. Durability is largely an economic life-cycle design consideration whereas damage tolerance directly addresses the structural airworthiness (safety) of the vehicle. However, both durability and damage tolerance design methodologies must address the deleterious effects of changes in material properties and the initiation and growth of microstructural damage that may occur during the service lifetime of the vehicle. Durability and damage tolerance design and certification requirements are addressed for commercial transport aircraft and NASA manned spacecraft systems. The state-of-the-art in advanced design and analysis methods is illustrated by discussing the results of several recently completed NASA technology development programs. These programs include the NASA Advanced Subsonic Technology Program demonstrating technologies for large transport aircraft and the X-33 hypersonic test vehicle demonstrating technologies for a single-stage-to-orbit space launch vehicle.Harris, Charles E. and Starnes, James H., Jr. and Shuart, Mark J.Langley Research CenterAIRCRAFT RELIABILITY; DAMAGE; DESIGN ANALYSIS; MICROSTRUCTURE; LIFE (DURABILITY); AEROSPACE VEHICLES; CERTIFICATION; COMMERCIAL AIRCRAFT; ECONOMICS; HYPERSONIC VEHICLES; X-33 REUSABLE LAUNCH VEHICLE...
Author : Anonim
Publisher : Unknown
Page : 752 pages
File Size : 54,7 Mb
Release : 1984
Category : Airplanes
ISBN : CORNELL:31924057855706
Author : Attilio Salvetti,Giorgio Cavallini
Publisher : Unknown
Page : 694 pages
File Size : 53,6 Mb
Release : 1985
Category : Technology & Engineering
ISBN : UOM:39015011744052
Author : Assimina A. Pelegri
Publisher : Unknown
Page : 192 pages
File Size : 54,6 Mb
Release : 1999
Category : Technology & Engineering
ISBN : UOM:39015042553324
Contains 20 selected technical papers presented at a November 1999 meeting, concentrating on advances made towards the assessment and prediction of durability and damage tolerance of composites.
Author : S. D. Manning,B. J. Pendley,W. R. Garver,S. M. Speaker,S. P. Henslee,V. D. Smith,J. W. Norris,B. G. W. Yee,Masanobu Shinozuka,J. N. Yang
Publisher : Unknown
Page : 228 pages
File Size : 44,9 Mb
Release : 1979
Category : Fasteners
ISBN : UOM:39015095313824
A summary is presented of an analytical methodology developed to meet USAF durability requirements. Details are given in four companion volumes. Analytical approaches that are currently used or have potential to be used to determine economic life are surveyed. Results of a structural survey of durability problems experienced at USAF ALC's are summarized. Durability critical parts criteria and economic life criteria are discussed. An analytical method to determine the crack population in a structure as a function of service time is presented. Fastener-hole cracking is the basic form of damage analyzed. Representations of initial quality and growth of small cracks are discussed. The effect of inspection and repair on the distribution of cracks is included.
Author : J. R. Gebman
Publisher : RAND Corporation
Page : 60 pages
File Size : 52,8 Mb
Release : 2008
Category : History
ISBN : UOM:39015075625619
The structures making up airframes must be durable and damage tolerant, and the means of ensuring that they are have long been well defined for structures made of metal. But a host of new hybrid materials, some of which contain no metal, are now being used, and these can present new damage mechanisms that engineers must address. The Air Force has established a general approach to airframe durability and damage tolerance. The author examines that approach and considers ways it will need to adapt for the new materials. Given the variety of materials, processes, and end uses involved, the engineering effort will necessarily involve multiple specialties. In these circumstances, the tailoring process could benefit from the efforts of systems engineers. The report addresses both technical and programmatic concerns and identifies opportunities for materials and structural engineers to collaborate with systems engineers. Finally, it offers a framework for collaboration.
Author : John E. McCarty
Publisher : Unknown
Page : 24 pages
File Size : 49,9 Mb
Release : 1984
Category : Airframes
ISBN : NASA:31769000508518
Author : Robert L. Sierakowski
Publisher : Routledge
Page : 107 pages
File Size : 41,8 Mb
Release : 2018-12-13
Category : Technology & Engineering
ISBN : 9781351456708
This recent book provides a detailed presentation of damage tolerance assessment and characterization methods for advanced composites, as well as an examination of the role of damage tolerance in the design of composites. Included are analytical models for different types of damage in different composite materials. Tables provide helpful reference
Author : Charles E. Harris
Publisher : Unknown
Page : 520 pages
File Size : 52,6 Mb
Release : 1994
Category : Airframes
ISBN : NASA:31769000471097
Author : Anonim
Publisher : Unknown
Page : 456 pages
File Size : 53,8 Mb
Release : 1995
Category : Aeronautics
ISBN : UIUC:30112005546491
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.
Author : P. R. Abelkis
Publisher : ASTM International
Page : 500 pages
File Size : 49,9 Mb
Release : 1982
Category : Technology & Engineering
ISBN : 0803107145