Fatigue under Thermal and Mechanical Loading: Mechanisms, Mechanics and Modelling

Fatigue under Thermal and Mechanical Loading: Mechanisms, Mechanics and Modelling PDF

Author: J. Bressers

Publisher: Springer Science & Business Media

Published: 1996-04-30

Total Pages: 526

ISBN-13: 9780792339939

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This volume contains 50 contributions presented at the symposium `Fatigue under Thermal and Mechanical Loading'. The symposium addressed the mechanisms, mechanics and modelling of thermal and thermal-mechanical load effects on conventional and advanced structural materials. The proceedings provide an update of the research efforts in thermal and thermal-mechanical fatigue. The papers cover a wide range of materials, including metallic alloys from steels to advanced superalloy single crystals, ceramics as well as composites. Topics encompass recent developments in specimen and component testing techniques, mechanisms and mechanics of inelastic deformation, crack initiation and crack growth, as well as damage modelling for life-time prediction. The book is of interest to materials scientists, mechanical engineers and design engineers involved in the design of components for use at high temperatures.

Properties of Aluminum Alloys

Properties of Aluminum Alloys PDF

Author: John Gilbert Kaufman

Publisher: ASM International

Published: 2008-01-01

Total Pages: 569

ISBN-13: 1615031162

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A compilation of data collected and maintained for many years as the property of a large aluminum company, which decided in 1997 to make it available to other engineers and materials specialists. In tabular form, presents data on the tensile and creep properties of eight species of wrought alloys and five species of cast alloys in the various shapes used in applications. Then looks at the fatigue data for several alloys under a range of conditions and loads. The data represent the typical or average findings, and though some were developed years ago, the collection is the largest and most detailed available. There is no index.

Fatigue Life Calculation of Overhead Sign Structure Due to Thermal Loading

Fatigue Life Calculation of Overhead Sign Structure Due to Thermal Loading PDF

Author: Lucky K C

Publisher:

Published: 2019

Total Pages: 55

ISBN-13:

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This thesis analytically investigates the effects of thermal loading on the aluminum overhead sign structure and calculates the remaining fatigue life of the structure. Overhead sign structures are widely used across freeways and highways to support traffic signals and signposts and monitor the proper flow of traffic. The Ohio Department of Transportation (ODOT) is responsible for the inspection and safe operation of the overhead sign structures in Ohio. However, sudden failure of an overhead sign structure on Alum Creek Drive in Columbus, Ohio, lead ODOT to initiate an investigation to determine the cause of failure. From the study done by a research team from the University of Toledo, Ohio, it was concluded that the failure was fatigue failure. Fatigue failure occurs due to the repetitive cyclic load acting on the structure. The cyclic loading can be thermal loading, wind loading, wind galloping and so on. This research concentrates on the effects of thermal loading on the structure and mainly illustrates about the fatigue stresses that are generated by the daily temperature variations and calculation of the fatigue life of the overhead sign structure due to these stresses. The research was done by creating an analytical model (based on the standard drawing provided by ODOT) of the structure using finite element software SAP2000, so that it resembled the structure that was erected in the field. Cyclic loading due to daily temperature variations was considered. The data of the daily temperature change were obtained from the National Climatic Data Center (NCDC) and a temperature histogram was plotted. These temperature variations were applied to the structure as thermal loads and corresponding thermal stresses were generated. Finally, using the Palmgren-Miner's rule, the fatigue life of the structure was calculated. This calculation of fatigue life assumed that the welded joints were in sound condition and there were no structural defects in the structure. Therefore, for pristine geometry and proper welded condition, the result indicated the fatigue life of the structure due to thermal loading to be greater than the service life of the structure.

Fatigue

Fatigue PDF

Author: John J. Burke

Publisher: Springer Science & Business Media

Published: 2013-11-11

Total Pages: 419

ISBN-13: 1489917365

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The Army Materials and Mechanics Research Center in coop eration with the Materials Science Group of the Department of Chemical Engineering and Materials Science of Syracuse University has been conducting the Annual Sagamore Army Materials Research Conference since 1954. The specific purpose of these conferences has been to bring together scientists and engineers from academic institutions, industry and government who are uniquely qualified to explore in depth a subject of importance to the Department of Defense, the Army and the scientific community. These proceedings entitled, FATIGUE - ENVIRONMENT AND TEMPER ATURE EFFECT, address the overview of temperature and environmental effects of fatigue, room temperature environmental effects, high temperature and environmental effect - mechanisms, high tempera ture and environmental effect - mechanisms, materials and design-engineering applications. We wish to acknowledge the assistance of Messrs. Joseph Bernier and Dan McNaught of the Army Materials and Mechanics Research Center and Helen Brown DeMascio of Syracuse University throughout the stages of the conference planning and finally the publication of the book. The continued active interest and support of these conferences by Dr. E. Wright, Director of the Army Materials and Mechanics Research Center, is appreciated.

Mechanical Vibration and Shock Analysis, Fatigue Damage

Mechanical Vibration and Shock Analysis, Fatigue Damage PDF

Author: Christian Lalanne

Publisher: John Wiley & Sons

Published: 2013-03-04

Total Pages: 368

ISBN-13: 1118618939

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Mechanical Vibration and Shock Analysis, Second Edition Volume 4: Fatigue Damage Fatigue damage in a system with one degree of freedom is one of the two criteria applied when comparing the severity of vibratory environments. The same criterion is also employed for a specification representing the effects produced by the set of vibrations imposed in a real-world environment. In this volume, which is devoted to the calculation of fatigue damage, the author explores the various hypotheses and models used to describe the behavior of material suffering fatigue and the laws of fatigue accumulation. He also considers the methods of counting response peaks, which are used to establish a histogram when it is impossible to use the probability density of the peaks obtained with a Gaussian signal. The expressions for mean damage and its standard deviation are established and other hypotheses are tested. The Mechanical Vibration and Shock Analysis five-volume series has been written with both the professional engineer and the academic in mind. Christian Lalanne explores every aspect of vibration and shock, two fundamental and extremely significant areas of mechanical engineering, from both a theoretical and practical point of view. The five volumes cover all the necessary issues in this area of mechanical engineering. The theoretical analyses are placed in the context of both the real world and the laboratory, which is essential for the development of specifications.

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