Tag: Fatigue

Free Download Aircraft Fatigue Management by Lorrie Molent
English | PDF EPUB (True) | 2023 (2024 Edition) | 69 Pages | ISBN : 9819974674 | 12.1 MB
Fatigue occurs under cyclic loading and can significantly degrade the operational capability and safety of metallic aircraft components and structures. This book provides summaries of some metallic aircraft structural integrity issues, innovative but established examples of maintaining operational capability-airworthiness, and assessments of safe in-service fatigue lives. These topics are based on a through-life fatigue management philosophy that ensures safe and continued operation, including during life extensions that are almost inevitably required. This philosophy is underpinned by observations of the behaviour of fatigue cracks in actual structures subjected to realistic service loading conditions. The book includes topics like aircraft design requirements, individual aircraft fatigue loads monitoring, airframe fatigue testing, sources of fatigue-nucleating discontinuities, and prediction of fatigue crack growth from these discontinuities. All these aspects contribute to discussing methods of assuring the structural integrity and operational capability of realistically cracked structures. The book also discusses the exponential behaviour of lead or dominant cracks-those leading to first failure-and the practical significance of differences between fatigue fracture topographies produced under constant amplitude and variable amplitude loading. The book can be a valuable reference for researchers and professionals interested in aircraft fatigue management and allied fields.

Free Download Fatigue and Fracture Mechanics of High Risk Parts: Application of LEFM & FMDM Theory by Bahram Farahmand , George Bockrath , James Glassco
English | PDF | 1997 | 386 Pages | ISBN : 0412129914 | 27 MB
In the preliminary stage of designing new structural hardware that must perform a given mission in a fluctuating load environment, there are several factors the designers should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must be able to withstand the environment in question without failure. Therefore, a comprehen sive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems. These problems include the prevention of failures resulting from preexisting cracks in the parent material, welds or that develop under cyclic loading environment during the life of the structure. The importance of fatigue and fracture in nuclear, pressure vessel, aircraft, and aerospace structural hardware cannot be overemphasized where safety is of utmost concern. This book is written for the designer and strength analyst, as well as for the material and process engineer who is concerned with the integrity of the structural hardware under load-varying environments in which fatigue and frac ture must be given special attention. The book is a result of years of both acade mic and industrial experiences that the principal author and co-authors have accumulated through their work with aircraft and aerospace structures.

Free Download Megan A. Arroll, "Chronic Fatigue Syndrome: What You Need To Know About Cfs/Me"
English | 2014 | pages: 224 | ISBN: 1847093000 | EPUB | 0,6 mb
Chronic Fatigue Syndrome (CFS/ME) affects around 250,000 people in the UK, and an estimated one million in the USA. With a characteristic profile of severe exhaustion, flu-like symptoms, and unrefreshing sleep, it has no cure, but often improves with treatment and self-help. This book, by an expert who herself experienced chronic fatigue, presents the latest thinking on the condition, along with tried and tested advice on how to manage it.

Free Download Qigong for Chronic Fatigue Syndrome
Last updated 10/2020
Created by Des Lawton
MP4 | Video: h264, 1280×720 | Audio: AAC, 44.1 KHz, 2 Ch
Genre: eLearning | Language: English + srt | Duration: 20 Lectures ( 2h 8m ) | Size: 2.57 GB