Описание: 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.
Описание: This is the first book dedicated to the glass transition since this concept became recognized as a distinct and independent field of investigation. The glass transition is a synonym for relaxation and dynamics in complex disordered systems, especially in liquids. It embraces time-scales ranging from picoseconds to years. The book describes and interrelates the following processes: cooperative alpha processes in a cold liquid, structural relaxation in the glass near Tg, the Johari-Goldstein beta process, the Williams-GГ¶tze process in a warm liquid, fast nonactivated cage rattling and boson peak, and ultraslow Fischer modes. By describing the salient facts, explaining and discussing the fundamentals, the author attempts to introduce a unifying concept for the entire material. The formulas, diagrams and references are carefully selected to illustrate the main current ideas about the glass transition.
Описание: This volume contains 24 papers presented at the international concluding colloquium of the German priority programme (DFG-Verbundschwerpunktprogramm) "Transition", held in April 2002 in Stuttgart. The unique and successful programme ran six years starting April 1996, and was sponsored mainly by the Deutsche Forschungsgemeinschaft, DFG, but also by the Deutsches Zentrum fГјr Luft-und Raumfahrt, DLR, the Physikalisch-Technische Bundesanstalt Braunschweig, PTB, and Airbus Deutschland. The papers summarise the results of the programme and cover transition mechanisms, transition prediction, transition control, natural transition and measurement techniques, transition - turbulence – separation, and visualisation issues. Three invited papers are devoted to mechanisms of turbulence production, to a general framework of stability, receptivity and control, and a forcing model for receptivity analysis. Almost every transition topic arising in subsonic and transonic flow is covered.
Автор: GarzГі Vicente, Santos A. Название: Kinetic Theory of Gases in Shear Flows / Nonlinear Transport ISBN: 1402014368 ISBN-13(EAN): 9781402014369 Издательство: Springer Рейтинг: Цена: 27756 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This monograph provides a comprehensive study about how a dilute gas described by the Boltzmann equation responds under extreme nonequilibrium conditions. This response is basically characterized by nonlinear transport equations relating fluxes and hydrodynamic gradients through generalized transport coefficients that depend on the strength of the gradients. In addition, many interesting phenomena (e.g. chemical reactions or other processes with a high activation energy) are strongly influenced by the population of particles with an energy much larger than the thermal velocity, what motivates the analysis of high-degree velocity moments and the high energy tail of the distribution function.The authors have chosen to focus on shear flows with simple geometries, both for single gases and for gas mixtures. This allows them to cover the subject in great detail. Some of the topics analyzed include:-Non-Newtonian or rheological transport properties, such as the nonlinear shear viscosity and the viscometric functions. -Asymptotic character of the Chapman-Enskog expansion. -Divergence of high-degree velocity moments. -Algebraic high energy tail of the distribution function. -Shear-rate dependence of the nonequilibrium entropy. -Long-wavelength instability of shear flows. -Shear thickening in disparate-mass mixtures. -Nonequilibrium phase transition in the tracer limit of a sheared binary mixture. -Diffusion in a strongly sheared mixture. The text can be read as a whole or can be used as a resource for selected topics from specific chapters.
Описание: This well-structured book presents numerical simulations of shear localization in granular materials. The book uses a hypoplastic constitutive model enhanced by a characteristic length of the micro-structure in the form of a mean grain diameter.
Автор: Wright Название: The Physics and Mathematics of Adiabatic Shear Bands ISBN: 0521631955 ISBN-13(EAN): 9780521631952 Издательство: Cambridge Academ Рейтинг: Цена: 17174 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book establishes the mathematical setting within which shear bands may be studied and uses well established techniques that describe major aspects of their formation and morphology.
Автор: C.M. Wang Название: Shear Deformable Beams and Plates, ISBN: 0080437842 ISBN-13(EAN): 9780080437842 Издательство: Elsevier Science Рейтинг: Цена: 21236 р. Наличие на складе: Поставка под заказ.
Описание: Illustrates how shear deformation theories provide accurate solutions compared to the classical theory. This book is divided into two parts. Part 1 consists of Chapters 2 to 5 dealing with beams, and Part 2 consists of Chapters 6 to 13 covering plates. It includes problems at the end of each chapter to use, extend, and develop relationships.
Автор: Smits Alexander J., Dussauge Jean-Paul Название: Turbulent Shear Layers in Supersonic Flow ISBN: 0387261400 ISBN-13(EAN): 9780387261409 Издательство: Springer Рейтинг: Цена: 22204 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: A good understanding of turbulent compressible flows is essential to the design and operation of high-speed vehicles. Such flows occur, for example, in the external flow over the surfaces of supersonic aircraft, and in the internal flow through the engines. Our ability to predict the aerodynamic lift, drag, propulsion and maneuverability of high-speed vehicles is crucially dependent on our knowledge of turbulent shear layers, and our understanding of their behavior in the presence of shock waves and regions of changing pressure. Turbulent Shear Layers in Supersonic Flow provides a comprehensive introduction to the field, and helps provide a basis for future work in this area. Wherever possible we use the available experimental work, and the results from numerical simulations to illustrate and develop a physical understanding of turbulent compressible flows.
Описание: Cebeci addresses transition from laminar to turbulent flows and considers solutions, mainly with the help of the linear stability theory and the ways in which it can be implemented accurately by numerical procedures. The main concern is transition of wall boundary layers, although one chapter is devoted to an approach based on the Navier-Stokes equations. The first three chapters summarize physical knowledge of the transition process, consider the stability equations and methods for predicting transition by linear stability theory, and describe efficient and accurate numerical methods for the solution of stability equations. Chapters 4 to 7 describe computer programs based on stability-theory approach to identify the location of transition in two- and three-dimensional incompressible and compressible flows, respectively, and Chapter 7 describes a computer program within the framework of parabolized stability equations. These programs are provided on an accompanying CD-ROM.
Описание: This volume represents the findings of the first test cases considered by ERCOFTAC (European Research Consortium on Flow Turbulence and Combustion).
Автор: Xie Название: Dynamic Stability of Structures ISBN: 0521158826 ISBN-13(EAN): 9780521158824 Издательство: Cambridge Academ Рейтинг: Цена: 7952 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This 2006 book presents a systematic introduction to the theory of parametric stability of structures under both deterministic and stochastic loadings. A comprehensive range of theories are presented and various application problems are formulated and solved, often using more than one approach. Investigation of an elastic system's dynamic stability frequently leads to the study of dynamic behaviour of the solutions of parametrically excited systems. Parametric instability or resonance is more dangerous than ordinary resonance as it is characterised by exponential growth of the response amplitudes even in the presence of damping. The emphasis in this book is on the applications and various analytical and numerical methods for solving engineering problems. The materials presented are as self-contained as possible, with all of the important steps of analysis provided in order to make the book suitable as a graduate-level textbook and especially for self-study.
Название: Transition and turbulence control ISBN: 9812564705 ISBN-13(EAN): 9789812564702 Издательство: World Scientific Publishing Рейтинг: Цена: 26212 р. Наличие на складе: Поставка под заказ.
Описание: This volume contains articles based on lectures given at the Workshop on Transition and Turbulence Control, hosted by the Institute for Mathematical
Sciences, National University of Singapore, 8-10 December 2004. The lecturers included 13 of the world's foremost experts in the control of transitioning and turbulent flows. The
chapters cover a wide range of subjects in the broad area of flow control, and will be useful to researchers working in this area in academia, government laboratories and
industry.
The coverage includes control theory, passive, active and reactive methods for controlling transitional and turbulent wall-bounded flows, noise suppression and
mixing enhancement of supersonic turbulent jets, compliant coatings, modern flow diagnostic systems, and swept wing instabilities.
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