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Fatigue Strength Design and Analysis of Aircraft Structures

Author : Paul R. Abelkis

Publisher :

Page : 126 pages

File Size : 35,94 MB

Release : 1967

Category : Airframes

ISBN :

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Book Description

Aircraft fatigue strength design and analysis concepts were investigated in the areas of fatigue life scatter factors and fatigue strength design-analysis charts. A fatigue scatter factor is defined as the ratio of the mean life to the life for a specified probability of failure and confidence level. For design purposes, operational life scatter factor are defined in terms of the joint probability distribution of the applied loads spectra variation in a fleet of aircraft and the basic fatigue life scatter represented by fatigue test data. Basic fatigue life scatter properties for aluminum alloy materials and structures were statistically derived from a fatigue test data survey of over 6,000 specimens. The basic scatter derived frequency and probability distributions greatly deviate from the log Normal distribution beyond micron + or -2 sigma. Several joint probability distribution models illustrate the procedure of calculating operational life scatter factors. An actual aircraft service failure history is accurately predicted by the joint probability distribution concept. A procedure for the development of fatigue strength design-analysis charts is outlined and illustrated by several examples. The charts, in the form of damage rate curves, are defined by generalized loads spectra parameters and the fatigue quality of the structural element.



Fatique Strength Design and Analysis of Aircraft Structures. Part Ii. Fatigue Life Analysis Computer Program--user's Manual

Author : Paul R. Abelkis

Publisher :

Page : 394 pages

File Size : 33,55 MB

Release : 1967

Category :

ISBN :

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Book Description

The computer program for the calculation of structural fatigue damage is completely defined in the form of a user's manual. The program, although primarily directed for the fatigue analysis of aircraft structures, is applicable to any general fatigue damage calculation using the linear (Palmgren-Miner) damage rule. Input data basically consists of the loads spectrum and fatigue strength allowables - S-N data. The program is especially conducive to mission-flight profile analysis and includes gust loads spectrum equation of MIL-A-8866, calculation of rigid airplane c.g. vertical load factor response due to continuous turbulence, and the automatic definition and damage calculation of the Ground-Air-Ground cycles from the mission profile spectrum.





Long-Life Design and Test Technology of Typical Aircraft Structures

Author : Jun Liu

Publisher : Springer

Page : 160 pages

File Size : 36,51 MB

Release : 2018-05-21

Category : Technology & Engineering

ISBN : 9811083991

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Book Description

This book addresses anti-fatigue manufacturing, analysis and test verification technologies for typical aircraft structures, including fastening holes, shot peening plates, different types of joints and wing boxes. Offering concrete solutions to practical problems in aircraft engineering, it will benefit researchers and engineers in the fields of Aerospace Technology and Astronautics.



Fatigue Design Procedures

Author : E. Gassner

Publisher : Elsevier

Page : 535 pages

File Size : 11,51 MB

Release : 2014-05-16

Category : Technology & Engineering

ISBN : 1483185818

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Book Description

Fatigue Design Procedures presents the full text of the papers presented at the 4th Symposium of the International Committee on Aeronautical Fatigue held in Munich, Germany on June 16-18, 1965, and summaries of the discussion held about them. The papers featured in the volume covers different aspects of fatigue design. These include fail-safe design for a jet transport airplane, the weapon systems fatigue certification program of the U.S. Air Force, the role of variable amplitude or constant amplitude tests in design studies, the evaluation of allowable design stress and corresponding fatigue life, and the importance of fatigue design testing. This book will be of interest to persons dealing with studies on fatigue design methods.



Aircraft Fatigue

Author : J. Y. Mann

Publisher : Elsevier

Page : 572 pages

File Size : 21,16 MB

Release : 2013-10-22

Category : Business & Economics

ISBN : 1483146456

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Book Description

Aircraft Fatigue: Design, Operational and Economic Aspects contains the proceedings of the ""Symposium on Aircraft Fatigue—Design, Operational and Economic Aspects,"" held in Melbourne, Australia, on May 22-24, 1967. The papers explore the design and operational aspects of the fatigue problem in general aviation and transport aircraft, as well as the economic aspects of the fatigue problem as it affects both operators and manufacturers. This book is comprised of 21 chapters and begins with a description of an approach to structural reliability analysis based on order statistics and the expected time to first failure in a fleet of specified magnitude, along with its application to structures subject to progressive fatigue damage. The following chapters deal with structural load measurement and analysis; design and certification programs for a wide range of aircraft types including the Anglo-French and American civil supersonic transports; acoustic fatigue; and the design of joints. The detection of fatigue cracks in service and the effects of fatigue on the cost of design and operation of aircraft are also discussed. This monograph will be a useful resource for aircraft and aeronautical engineers as well as officials of civil aviation.



Concepts in Fail-safe Design of Aircraft Structures

Author : David Broek

Publisher :

Page : 28 pages

File Size : 18,44 MB

Release : 1971

Category : Aeronautics

ISBN :

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Book Description

In order to obtain an appraisal of the state of the art of fail-safe design, the author made an investory of fail-safe design methods applied by various aerospace companies and of research work relevant to the engineering approach of fatigue-crack propagation and residual strength. This memorandum is based on information from discussions with personnel of several companies and research laboratories, with the main emphasis on plane stress and transitional fracture behavior. The memorandum presents a brief description of the general approach to the fail-safe problem, an analysis of several of the existing methods that use this approach, including their shortcomings, and a summary of the data required for a good fail-safe design. A specific approach proposed for the presentation in MIL-HDBK-5 of data pertinent to the fail-safe design concept is evaluated in terms of its applicability to that concept. (Author).





Aircraft Structures for Engineering Students

Author : T.H.G. Megson

Publisher : Butterworth-Heinemann

Page : 962 pages

File Size : 44,19 MB

Release : 2021-08-11

Category : Technology & Engineering

ISBN : 0323902111

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Book Description

Aircraft Structures for Engineering Students, Seventh Edition, is the leading self-contained aircraft structures course text suitable for one or more semesters. It covers all fundamental subjects, including elasticity, structural analysis, airworthiness and aeroelasticity. Now in its seventh edition, the author has continued to expand the book’s coverage of analysis and design of composite materials for use in aircraft and has added more real-world and design-based examples, along with new end-of-chapter problems of varying complexity. Retains its hallmark comprehensive coverage of aircraft structural analysis New practical and design-based examples and problems throughout the text aid understanding and relate concepts to real world applications Updated and additional Matlab examples and exercises support use of computational tools in analysis and design Available online teaching and learning tools include downloadable Matlab code, solutions manual, and image bank of figures from the book



Introduction to Aircraft Structural Analysis

Author : T.H.G. Megson

Publisher : Butterworth-Heinemann

Page : 760 pages

File Size : 27,10 MB

Release : 2017-06-14

Category : Technology & Engineering

ISBN : 0081021003

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Book Description

Introduction to Aircraft Structure Analysis, Third Edition covers the basics of structural analysis as applied to aircraft structures. Coverage of elasticity, energy methods and virtual work set the stage for discussions of airworthiness/airframe loads and stress analysis of aircraft components. Numerous worked examples, illustrations and sample problems show how to apply the concepts to realistic situations. As a self-contained guide, this value-priced book is an excellent resource for anyone learning the subject. Based on the author's best-selling text, Aircraft Structures for Engineering Students Contains expanded coverage of composite materials and structures“/li> Includes new practical and design-based examples and problems throughout the text Provides an online teaching and learning tool with downloadable MATLAB code, a solutions manual, and an image bank of figures from the book