Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Shock waves. --- Shock (Mechanics) --- Waves --- Materials --- Dynamic testing. --- Dynamic loading (Materials) --- Loading, Dynamic (Materials) --- Loads, Dynamic (Materials) --- Dynamic testing --- Testing

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Materials --- Matériaux --- Dynamic testing --- Essais dynamiques --- -Engineering --- Engineering materials --- Industrial materials --- Engineering design --- Manufacturing processes --- Dynamic testing. --- -Dynamic testing --- Matériaux --- Dynamic loading (Materials) --- Loading, Dynamic (Materials) --- Loads, Dynamic (Materials) --- Testing --- Structure

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

High-speed impact dynamics is of interest in the fundamental sciences, e.g., astrophysics and space sciences, and has a number of important applications in military technologies, homeland security and engineering. When compared with experiments or numerical simulations, analytical approaches in impact mechanics only seldom yield useful results. However, when successful, analytical approaches allow us to determine general laws that are not only important in themselves but also serve as benchmarks for subsequent numerical simulations and experiments. The main goal of this monograph is to demonstrate the potential and effectiveness of analytical methods in applied high-speed penetration mechanics for two classes of problem. The first class of problem is shape optimization of impactors penetrating into ductile, concrete and some composite media. The second class of problem comprises investigation of ballistic properties and optimization of multi-layered shields, including spaced and two-component ceramic shields. Despite the massive use of mathematical techniques, the obtained results have a clear engineering meaning and are presented in an easy-to-use form. One of the chapters is devoted solely to some common approximate models, and this is the first time that a comprehensive description of the localized impactor/medium interaction approach is given. In the monograph the authors present systematically their theoretical results in the field of high-speed impact dynamics obtained during the last decade which only partially appeared in scientific journals and conferences proceedings.

Penetration mechanics. --- Deformations (Mechanics) --- Structural dynamics. --- Materials --- Dynamic testing. --- Dynamic loading (Materials) --- Loading, Dynamic (Materials) --- Loads, Dynamic (Materials) --- Dynamic testing --- Building dynamics --- Dynamics, Structural --- Structural vibration --- Strains and stresses --- Structural analysis (Engineering) --- Elastic solids --- Mechanics --- Rheology --- Structural failures --- Ballistics --- Fracture mechanics --- Impact --- Mechanics, Applied --- Testing --- Mechanical engineering. --- Mechanics. --- Mechanics, Applied. --- Engineering design. --- Engineering mathematics. --- Mechanical Engineering. --- Solid Mechanics. --- Engineering Design. --- Mathematical and Computational Engineering. --- Engineering --- Engineering analysis --- Mathematical analysis --- Design, Engineering --- Industrial design --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Machinery --- Steam engineering --- Mathematics --- Design --- Applied mathematics.

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book represents a collection of major research contributions over the last decade in the area of composite materials and sandwich structures supported by the USA Office of Naval Research under the directorship of Dr. Yapa D. S. Rajapakse. It contains over thirty chapters written by recognized experts in their fields and serves as a reference and guide for future research. Topics covered include: mechanical and failure characterization of composites under static and dynamic loading; failure modes and failure criteria; environmental effects; dynamic effects; post impact behavior; multiscale modeling; nanocomposites; characterization of core materials for sandwich structures under static and fatigue loading; mechanical behavior and failure of sandwich structures; fatigue behavior and durability of composite materials and sandwich structures; core joints in sandwich structures; characterization and failure of marine materials and structures under impulse loading; failure of interfaces under dynamic loading; delamination failure of composite materials and sandwich structures; response of composites and sandwich structures to blast loading and underwater explosions.

Composite materials. --- Sandwich construction. --- Composite materials --- Sandwich construction --- Chemical Engineering --- Materials Science --- Chemical & Materials Engineering --- Engineering & Applied Sciences --- Materials --- Naval research --- Testing. --- Mechanical properties --- Research. --- Dynamic testing. --- Dynamic loading (Materials) --- Loading, Dynamic (Materials) --- Loads, Dynamic (Materials) --- Composites (Materials) --- Multiphase materials --- Reinforced solids --- Solids, Reinforced --- Two phase materials --- Materials science. --- Mechanics. --- Mechanics, Applied. --- Materials Science. --- Ceramics, Glass, Composites, Natural Methods. --- Theoretical and Applied Mechanics. --- Dynamic testing --- Laminated materials --- Lightweight construction --- Testing --- Mechanics, applied. --- Ceramics, Glass, Composites, Natural Materials. --- Classical Mechanics. --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Ceramics. --- Glass. --- Composites (Materials). --- Amorphous substances --- Ceramics --- Glazing --- Ceramic technology --- Industrial ceramics --- Keramics --- Building materials --- Chemistry, Technical --- Clay

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The book is concentrated with an analysis of the dynamic behaviour of axially moving orthotropic web. Axially moving materials are of technological importance and are present in various industrial applications. Power transmission belts, paper and plastic sheets in process, the steel strip in a thin steel sheet production line, the band saw blade are only some examples of two-dimensional continua, where vibrations are associated with an axial transport of mass. Generally, axially moving continuum in the form of thin, flat rectangular shape material with small flexural stiffness is called a web. Webs are moving at high speed, for example, in paper production the paper webs are transported with longitudinal speeds of up to 3000 m/min. Above the critical speed one can expect various dynamical instabilities mainly of divergent and flutter type. These instabilities can decrease the quality of products and their performance. The instability of band saw results in low surface quality, unsatisfactory cutting performance and leads to the loss of raw materials. In paper production, the machines instabilities, resonance oscillations and the flutter of the web can cause the wrinkling or even a breaking of the web. On the other hand one important problem in these systems is the occurrence of large transverse vibrations due to tension variations termed as parametric vibrations. Dynamic response and stability associated with parametric vibrations are of primary concern in the dynamic investigations of these systems. To ensure that the operating system is under stable working conditions, full analysis of its dynamics has to be performed. Complete knowledge of the dynamical behaviour allows the prediction and control of instabilities. In the beginning part of this book the up-to-date state of knowledge in the field of dynamic behaviour of axially moving materials is presented. The first studies on this subject date in the middle of the twentieth century. Historically, the one-dimensional string theory, the beam theory, and the two-dimensional plate theory were successively used in modelling the axially moving continua. To avoid complications, a lot of earlier works for modelling of two-dimensional axially moving materials used the one-dimensional string or beam theory instead of the plate theory. Although this simplification leads to reasonable results in particular cases, the two-dimensional analysis is required for modelling of many problems such as composite materials, wide width plates, various forces across the width and etc. In the reference review the works from the last twenty years are mostly taken into account. The particular emphasis is paid on the role of nonlinearities in the dynamic behaviour of the travelling systems. In the next part of the book a nonlinear mathematical model of the axially moving orthotropic web is derived. The non-linear orthotropic plate theory is modified to include the internal forces resulting from the moving web and internal damping of travelling material. The differential equations of motion are derived from the Hamilton’s principle taking into account the Lagrange description, the strain Green tensor for thin-walled plates and the Kirchhoff stress tensor. The mathematical model has the form of two non-linear partial differential equations which describe transverse motion of the web and the field of sectional forces In the next part of the book the solutions of the mathematical model that show displacements and critical transport speeds of the web in equilibrium states of the linearized system are presented. Static analysis, by determination of the non-trivial equilibrium positions existence is used in investigations of stability of the web motion. Equations of equilibrium positions of axially moving web with uniform motion are derived. Transverse displacements and wrinkling of the webs of two kinds of papers and the corrugated board constructed with these papers are numerically investigated. The investigation results of stability of the non-linear system motion are presented in the final part of the book. The Galerkin method is used to discretize the governing equations of motions and a high dimensional system of ordinary differential equations is obtained. The dynamic behaviour is studied in the sub- and super-critical speed ranges of the web. Three different rheological model of internal damping are taken into consideration in the dynamic studies of the beam model of the traveling web. Important features of the book The up-to-date knowledge in the field of dynamic behaviour of axially moving two-dimensional materials is gathered and arranged in the one place. To the author’s opinion this is the first attempt to arrange this knowledge in the book-form. The results of the investigations to be discussed in this book are concerned mainly paper webs used in manufacturing of corrugated board. The parameters of the considered papers are determined in experimental way. The corrugated board web, composed of these papers and treated as a composite structure, is an object of the investigations as well. The effects of the geometric nonlinearity, the internal damping of the moving materials, and the tension perturbations treated as parametric excitation on the dynamic behaviour of the system are numerically investigated.

Engineering. --- Theoretical and Applied Mechanics. --- Vibration, Dynamical Systems, Control. --- Statistical Physics, Dynamical Systems and Complexity. --- Mechanics. --- Computational Intelligence. --- Computational Mathematics and Numerical Analysis. --- Computer science --- Mechanics, applied. --- Vibration. --- Ingénierie --- Informatique --- Mécanique --- Vibration --- Mathematics. --- Mathématiques --- Flexure. --- Manufacturing processes -- Automation. --- Materials -- Dynamic testing. --- Manufacturing processes --- Materials --- Flexure --- Materials Science --- Civil Engineering --- Industrial & Management Engineering --- Chemical & Materials Engineering --- Mechanical Engineering --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Automation --- Dynamic testing --- Automation. --- Dynamic testing. --- Dynamic loading (Materials) --- Loading, Dynamic (Materials) --- Loads, Dynamic (Materials) --- Computer mathematics. --- Statistical physics. --- Dynamical systems. --- Computational intelligence. --- Mechanics, Applied. --- Dynamics. --- Dynamical systems --- Kinetics --- Mathematics --- Mechanics, Analytic --- Force and energy --- Mechanics --- Physics --- Statics --- Cycles --- Sound --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Intelligence, Computational --- Artificial intelligence --- Soft computing --- Mathematical statistics --- Classical mechanics --- Newtonian mechanics --- Dynamics --- Quantum theory --- Computer mathematics --- Discrete mathematics --- Electronic data processing --- Construction --- Industrial arts --- Technology --- Statistical methods --- Testing