Îïèñàíèå: The question whether a structure or a machine component can carry the applied loads, and with what margin of safety, or whether it will become unserviceable due to collapse or excessive inelastic deformations, has always been a major concern for civil and mechanical engineers. The purpose of this book is a presentation of state-of-the-art methods which provide conceptual and computational means to answer this technologically crucial question without analysing the evolution of the system under monotonic or variable repeated loads. The focus is on recent developments which may be classified as follows: Adaptation of the general theoretical achievements to specific types of structures and, at the micro-scale, to heterogeneous materials; Generalisation of the basic theory to dynamics, i.e. to the time-dependence due to inertia and damping forces; Reformulation of the fundamental theorems in the broader frame of geometrically non-linear theory of solids and structures; Allowing for more sophisticated models of inelastic material behaviour, including non-linear hardening and softening, non-associated flow rules, viscous effects, multi-phase poro-plasticity, and material damage; Development of computational procedures and specific ad-hoc algorithms by which direct methods can be efficiently used to solve large-scale industrial problems.

Îïèñàíèå: This volume builds on the ideas of geometric non-linearity explained in Volume One. Continuum mechanics, plasticity and stability theory are covered in greater depth as it explores the research on non-linear finite elements. A supplementary set of programmes is available on the Internet.

Îïèñàíèå: Rapid advances in analytical methods and computing enable engineers to apply stability/stiffness methods to increasingly complex real-life cases. This advanced and graduate-level text and self-tutorial teaches readers to understand and to apply analytical design principles across the breadth of the engineering sciences. Emphasizing fundamentals, the book addresses the stability of key engineering elements such as rigid-body assemblage, beam-columns, rigid frames, thin plates, arches, rings, or shells. Each chapter contains numerous worked-out problems that clarify practical application and aid comprehension of the basics of stability theory, plus end-of-chapter review exercises. Others key features are the citing and comparison of different national building standards, use of non-dimensional parameters, and many tables with much practical data and simplified formula, that enable readers to use them in the design of structural components.

Àâòîð: Levy Robert, Spillers William R. Íàçâàíèå: Analysis of Geometrically Nonlinear Structures ISBN: 1402016549 ISBN-13(EAN): 9781402016547 Èçäàòåëüñòâî: Springer Ðåéòèíã: Öåíà: 18349 ð. Íàëè÷èå íà ñêëàäå: Ïîñòàâêà ïîä çàêàç.

Îïèñàíèå: This volume provides an extension of the methods of linear structural analysis to the case of geometrically nonlinear effects. Its importance derives from the theorem stating that "in the presence of pre-stress, geometrically nonlinear effects are of the same order as linear elastic effects".

Îïèñàíèå: Shell-type structures can be found almost everywhere. They appear in natural forms but also as man-made, load-bearing components in diverse engineering systems. Mankind has struggled to replicate natureâ€™s optimization of such structures but using modern computational tools it is now possible to analyse, design and optimise them systematically. Analysis and Optimization of Prismatic and Axisymmetric Shell Structures features: comprehensive coverage of the background theory of shell structures; development and implementation of reliable, creative and efficient computational tools for static and free-vibration analysis and structural optimization of variable-thickness shells and folded-plate structures; integrated computer-aided curve and surface modelling tools and automatic mesh generation, structural analysis sensitivity analysis and mathematical programming methods; CD-ROM containing well-documented Fortran software for these techniques using finite element and finite strip simulations which can be readily adapted by the reader for the solution of practical problems or for use within a teaching or research environment. Written by leading experts in finite element and finite strip methods, Analysis and Optimization of Prismatic and Axisymmetric Shell Structures will be of great interest to researchers in structural mechanics and in automotive, aerospace and civil engineering as well as to designers from all fields using shell structures for their strength-per-unit-mass advantages.

Îïèñàíèå: This volume contains two-page abstracts of the 482 papers presented at the latest conference on the subject, in Alexandroupolis, Greece. The papers of the tracks have been contributed from open call, while the papers of the symposia/sessions have been solicited by the respective organizers.

Îïèñàíèå: This book deals with problems of multiple repeated analyses (reanalysis) of structures. It introduces various concepts and methods, and presents them in a unified approach. This should prove useful to students, researchers, consultants, and practising engineers involved in analysis and design of structures. Reanalysis is common to numerous analysis and design tasks, and it is needed in such areas as structural optimisation, damage analysis, non-linear analysis, and probabilistic analysis. The material presented in the text is related to a wide range of applications in such fields as aerospace engineering, civil engineering, mechanical engineering, and naval architecture. The book discusses various analysis models, including linear and non-linear analysis, static and dynamic analysis, and design sensitivity analysis. It presents direct as well as approximate methods, and demonstrates how various concepts and methods are integrated to achieve effective solution procedures. Previous books on structural analysis do not cover most of the material presented in the book. To clarify the presentation, many illustrative examples and numerical results are demonstrated.

Îïèñàíèå: This book deals with the computational analysis of thin-walled structures such as aircraft, ships, and containment vessels. Building on the author's earlier book Static and Dynamic Analysis of Structures, it shows how to use computational methods to tackle some of the fundamental problems of structural mechanics, with particular emphasis on nonlinear phenomena. Where the earlier book dealt with linear systems, the central theme running through this volume is the notion that unstable equilibria are associated with motions and large displacements and therefore require a full nonlinear analysis. The discussion begins with an overview of the basic mechanics of deformable bodies, including variational formulations, and then considers the large deflection behavior of shell and frame structures using a finite-element analysis. The second part of the book begins with a summary of linear vibrations of structures, including an introduction to modal analysis; it continues with computational formulations of nonlinear dynamic analyses of structures and refines the concept of dynamic equilibrium in the context of large deflections. The book concludes with a discussion of stability, including the difficult problem of stability of motions in the large.By describing the methods on which commercial software pakckages are based, this book allows an engineer to evaluate the results these computations produce. It therefore should be useful to practicing engineers and graduate students.

Îïèñàíèå: This book focuses on a particular class of models (namely Multi-Mechanism models) and their applications to extensive experimental data base related to different kind of materials.

Àâòîð: Srinivasa, Arun R. Srinivasan, Sivakumar M. Íàçâàíèå: Inelasticity of materials ISBN: 9812837493 ISBN-13(EAN): 9789812837493 Èçäàòåëüñòâî: World Scientific Publishing Ðåéòèíã: Öåíà: 13010 ð. Íàëè÷èå íà ñêëàäå: Ïîñòàâêà ïîä çàêàç.

Îïèñàíèå: Builds upon the knowledge of elasticity and thermodynamics, and allows the reader to gain confidence in extending one`s skills in understanding and analyzing problems in inelasticity. This book helps the reader gain a level of comfort and competence in developing and using inelasticity models.

Îïèñàíèå: Stability and Optimization of Structures: Generalized Sensitivity Analysis is the first book to address issues of structural optimization against nonlinear buckling. Through the investigation of imperfection sensitivity, worst imperfection and random imperfection based on concrete theoretical framework, it is shown that optimization against buckling does not necessarily produce an imperfection-sensitive structure. This book offers the reader greater insight into optimization-based and computer-assisted stability design of finite-dimensional structures. Using the unified approach to parameter sensitivity analysis, it connects studies of elastic stability, computational mechanics and applied mathematics. Optimization based on stability theory is presented and explained, with 140 figures to illustrate applications in the framework of finite element analysis. This book focuses on the optimization of a geometrically-nonlinear structure under stability constraint. It presents a deep insight into optimization-based and computer-assisted stability design of discrete structures. Coverage combines design sensitivity analysis developed in structural optimization and imperfection-sensitivity analysis developed in stability analysis.

Îïèñàíèå: This book is a foray into the computer analysis of three-dimensional composite structures using the finite element method (FEM). The text advances from the
analysis of simple beams to arbitrary anisotropic and composite plates and shells; it treats both linear and nonlinear behaviour. Once the basic philosophy of the method is understood,
the reader may expand its application and modify the computer programs to suit particular needs.

It is shown how this leads to considerable savings in computer time. Chapter
1 provides results from continuum mechanics and forms the Principles of Virtual Work and Potential Energy. Chapter 2 sketches the history of the FEM.

Chapter 3 introduces
the concepts of natural modes and natural stiffness. Chapter 4 introduces the basic concepts of the theory of composites. Chapter 5 applies the natural mode met
od to the analysis of composite beams in three dimensions.Chapter 6 introduces the composite plate and shell element.

Chapter 7 shows the computational advantages of the
method on a model problem. Chapter 8 deals with nonlinear analysis of anisotropic shells. Chapter 9 discusses programming aspects.

The volume is designed for advanced
undergraduates, graduates, researchers, and practising engineers in the industry. The book is accompanied by a floppy disc containing the relevant software.