RESOLUTION OF THE TWENTIETH CENTURY CONUNDRUM IN ELASTIC STABILITY

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Resolution Of The Twentieth Century Conundrum In Elastic Stability

Author : Isaac Elishakoff
ISBN : 9789814583558
Genre : Technology & Engineering
File Size : 35.27 MB
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There have been stability theories developed for beams, plates and shells — the most significant elements in mechanical, aerospace, ocean and marine engineering. For beams and plates, the theoretical and experimental values of buckling loads are in close vicinity. However for thin shells, the experimental predictions do not conform with the theory, due to presence of small geometric imperfections that are deviations from the ideal shape. This fact has been referred to in the literature as ‘embarrassing’, ‘paradoxical’ and ‘perplexing’. Indeed, the popular adage, “In theory there is no difference between theory and practice. In practice there is”, very much applies to thin shells whose experimental buckling loads may constitute a small fraction of the theoretical prediction based on classical linear theory; because in practice, engineers use knockdown factors that are not theoretically substantiated. This book presents a uniform approach that tames this prima-donna-like and capricious behavior of structures that has been dubbed the ‘imperfection sensitivity’ — thus resolving the conundrum that has occupied the best minds of elastic stability throughout the twentieth century. Contents:IntroductionProbabilistic ResolutionHybrid Uncertainty in Imperfections and Axial LoadingNon-Probabilistic ResolutionNontraditional Imperfections in ShellsLower Bound for Buckling Load in Presence of Uncertainty Miscellaneous Topics Readership: Graduate Students, researchers, professionals in the field of mechanical engineering. Keywords:Stability;Imperfection-Sensitivity;Reliability
Category: Technology & Engineering

Numerical Analysis And Its Applications

Author : Ivan Dimov
ISBN : 9783642415159
Genre : Computers
File Size : 56.50 MB
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This book constitutes thoroughly revised selected papers of the 5th International Conference on Numerical Analysis and Its Applications, NAA 2012, held in Lozenetz, Bulgaria, in June 2012. The 65 revised papers presented were carefully reviewed and selected from various submissions. The papers cover a broad area of topics of interest such as numerical approximation and computational geometry; numerical linear algebra and numerical solution of transcendental equation; numerical methods for differential equations; numerical stochastics, numerical modeling; and high performance scientific computing.
Category: Computers

Probabilistic Methods In The Theory Of Structures Strength Of Materials Random Vibrations And Random Buckling

Author : Elishakoff Isaac E
ISBN : 9789813149878
Genre : Technology & Engineering
File Size : 45.46 MB
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The first edition of this book appeared over three decades ago (Wiley-Interscience, 1983), whereas the second one saw light on the verge of new millennium (Dover, 1999). This is third, corrected and expanded edition that appears in conjunction with its companion volume Probabilistic Methods in the Theory of Structures: Complete Worked-Through Solutions. Thus, the reader is able to both get acquainted with the theoretical material and be able to master some of the problems, following Chinese dictum: I hear and I forget. I see and I remember. I do and I understand — Confucius. The main idea of the book lies in the fact that three topics: probabilistic strength of materials, random vibrations, and probabilistic buckling are presented in a single package allowing one to see the forest in between the trees. Indeed, these three topics usually are presented in separate manners, in different specialized books. Here, the reader gets a feeling of true unity of the subject at large in order to appreciate that in the end what one wants is reliability of the structure, in conjunction with its operating conditions. As the author describes in the Preface of the second edition, this book was not conceived ab initio, as a book that author strived to compose. Rather, it was forced, as it were, upon me due to two reasons. One was rather a surprising but understandable requirement in the venerable Delft University of Technology, The Netherlands to prepare the lecture notes for students with the view of reducing skyrocketing costs of acquisition of textbooks by the students. The other one was an unusually warm acceptance of the notes that the author prepared while at Delft University of Technology and later in Haifa, at the Technion-Israel Institute of Technology by the legendary engineering scientist Warner Tjardus Koiter (1914–1997). The energy necessary to prepare the second and third editions came from enthusiastic reviews that appeared in various sources. Author embraced the simplicity of exposition as the main virtue following Isaac Newton's view that "Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things."
Category: Technology & Engineering

Fluid Structure Interactions

Author : Michael P. Paidoussis
ISBN : 9780123973139
Genre : Science
File Size : 60.17 MB
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The first of two books concentrating on the dynamics of slender bodies within or containing axial flow, Fluid-Structure Interaction, Volume 1 covers the fundamentals and mechanisms giving rise to flow-induced vibration, with a particular focus on the challenges associated with pipes conveying fluid. This volume has been thoroughly updated to reference the latest developments in the field, with a continued emphasis on the understanding of dynamical behaviour and analytical methods needed to provide long-term solutions and validate the latest computational methods and codes. In this edition, Chapter 7 from Volume 2 has also been moved to Volume 1, meaning that Volume 1 now mainly treats the dynamics of systems subjected to internal flow, whereas in Volume 2 the axial flow is in most cases external to the flow or annular. Provides an in-depth review of an extensive range of fluid-structure interaction topics, with detailed real-world examples and thorough referencing throughout for additional detail Organized by structure and problem type, allowing you to dip into the sections that are relevant to the particular problem you are facing, with numerous appendices containing the equations relevant to specific problems Supports development of long-term solutions by focusing on the fundamentals and mechanisms needed to understand underlying causes and operating conditions under which apparent solutions might not prove effective
Category: Science

Forensic Architecture

Author : Eyal Weizman
ISBN : 3775729119
Genre : Art
File Size : 39.46 MB
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Published in conjunction with the Documenta 13 exhibition in Kassel, Germany, the Documenta notebook series 100 Notes,100 Thoughtsranges from archival ephemera to conversations and commissioned essays. These notebooks express director Carolyn Christov-Bakargiev's curatorial vision for Documenta 13.
Category: Art

Die Dunkle Seite Der Nationalstaaten

Author : Philipp Ther
ISBN : 9783647368061
Genre : History
File Size : 87.95 MB
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»Ethnische Säuberungen« wurden nicht nur von Diktatoren, sondern auch von demokratisch gewählten Politikern veranlasst. Sie sind vor allem eine Folge des modernen Nationalismus und der Nationalstaatsbildung im 19. und 20. Jahrhundert. Dieses Buch bietet grundlegende Einsichten in eines der dunkelsten Kapitel des modernen Europa. Es befasst sich mit den Voraussetzungen »ethnischer Säuberungen« ebenso wie mit den Perioden und den verantwortlichen Akteuren von Flucht, Vertreibung, Zwangsaussiedlung und Deportation. Dabei beschränkt es sich nicht auf Osteuropa, sondern beleuchtet auch die Rolle der westlichen Großmächte. Der Autor spannt einen weiten thematischen Bogen von den Balkankriegen am Vorabend des Ersten Weltkriegs über die »ethnischen Säuberungen« während und infolge des Zweiten Weltkrieges bis zu den Bürgerkriegen im ehemaligen Jugoslawien und im Kaukasus der 1990er Jahre.
Category: History

Vorlesungen Uber Technische Mechanik

Author : August Foppl
ISBN : 0270379576
Genre :
File Size : 34.21 MB
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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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