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Wave Fields in Real Media: Wave Propagation in Anisotropic, Anelastic and Porous Media
Author: J. Jose M. Carcione | Size: 16.3 MB | Format:PDF | Quality:Unspecified | Year: 2001 | pages: 411 | ISBN: 0080439292
This book examines the differences between an ideal and a real description of wave propagation, where ideal means an elastic (lossless), isotropic and single-phase medium, and real means an anelastic, anisotropic and multi-phase medium. The analysis starts by introducing the relevant stress-strain relation. This relation and the equations of momentum conservation are combined to give the equation of motion. The differential formulation is written in terms of memory variables, and Biot's theory is used to describe wave propagation in porous media. For each rheology, a plane-wave analysis is performed in order to understand the physics of wave propagation. The book contains a review of the main direct numerical methods for solving the equation of motion in the time and space domains. The emphasis is on geophysical applications for seismic exploration, but researchers in the fields of earthquake seismology, rock acoustics, and material science - including many branches of acoustics of fluids and solids - may also find this text useful.
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Failure of components or systems must be prevented by both designers and operators of systems, but knowledge of the underlying mechanisms is often lacking. Since the relation between the expected usage of a system and its failure behavior is unknown, unexpected failures often occur, with possibly serious financial and safety consequences. Principles of Loads and Failure Mechanisms. Applications in Maintenance, Reliability and Design provides a complete overview of all relevant failure mechanisms, ranging from mechanical failures like fatigue and creep to corrosion and electric failures. Both qualitative and quantitative descriptions of the mechanisms and their governing loads enable a solid assessment of a system’s reliability in a given or assumed operational context. Moreover, a unique range of applications of this knowledge in the fields of maintenance, reliability and design are presented. The benefits of understanding the physics of failure are demonstrated for subjects like condition monitoring, predictive maintenance, prognostics and health management, failure analysis and reliability engineering. Finally, the role of these mechanisms in design processes and design for maintenance are illustrated.
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Advanced Dynamics: Analytical and Numerical Calculations with MATLAB
Author: Dan B. Marghitu & Mihai Dupac | Size: 13.1 MB | Format:PDF | Quality:Unspecified | Publisher: Springer | Year: 2012 | pages: 616 | ISBN: 9781461434740
Advanced Dynamics: Analytical and Numerical Calculations with MATLAB provides a thorough, rigorous presentation of kinematics and dynamics while using MATLAB as an integrated tool to solve problems. Topics presented are explained thoroughly and directly, allowing fundamental principles to emerge through applications from areas such as multibody systems, robotics, spacecraft and design of complex mechanical devices. This book differs from others in that it uses symbolic MATLAB for both theory and applications. Special attention is given to solutions that are solved analytically and numerically using MATLAB. The illustrations and figures generated with MATLAB reinforce visual learning while an abundance of examples offer additional support. This book also: Provides solutions analytically and numerically using MATLABIllustrations and graphs generated with MATLAB reinforce visual learning for students as they studyCovers modern technical advancements in areas like multibody systems, robotics, spacecraft and design of complex mechanicaldevices and mechanismsIncludes comprehensive MATLAB programs for the example problems Advanced Dynamics: Analytical and Numerical Calculations with MATLAB is an ideal book for senior undergraduate and first year graduate students in mechanical engineering.
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The book is a valuable contribution for engineers in government, industry, and universities who have complex shell buckling problems to solve and who have available to them computer programs for the buckling analysis of shells.' Applied Mechanics Review, 38:8 (1986) `What makes this book unique is that the author has succeeded in providing a `feel' for shell buckling based on careful mixture of theoretical, analytical, and numerical procedures. Many of the richly illustrated examples are written in a tutorial form, a guide-by-example for the modeling and solving of complex of nonlinear problems. It shows convincingly that the modern structural engineer must have a very thorough understanding of how structures behave if he is to use the advanced computational tools successfully. This book is a must for all those who work in the field of shell stability.' Journal of Applied Mechanics, 53 (1986)
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This book describes the application of nonlinear static and dynamic analysis for the design, maintenance and seismic strengthening of reinforced concrete structures. The latest structural and RC constitutive modeling techniques are described in detail, with particular attention given to multi-dimensional cracking and damage assessment, and their practical applications for performance-based design. Other subjects covered include 2D/3D analysis techniques, bond and tension stiffness, shear transfer, compression and confinement.
Nonlinear Mechanics of Reinforced Concrete presents a practical methodology for structural engineers, graduate students and researchers concerned with the design and maintenance of concrete structures
This document provides a set of clauses that may be used in drawing up execution specifications for bridge steelwork, in conjunction with BS EN 1090-2, for individual projects in the UK. The clauses represent an industry ‘best practice’ view of how the general requirements of BS EN 1090-2 may be modified and supplemented, where permitted by that Standard, to achieve the quality and reliability to be expected for bridges in the UK, designed in accordance with the Structural Eurocodes.
The clauses are grouped under headings which generally correspond to those of the principal BS EN 1090-2 and are presented in a two column format. The left-hand column model clauses and the right-hand column presents a commentary, giving background to further advice.
An appendix lists all the clauses in BS EN 1090-2 where further information is required or where options may be specified and indicates which of these have corresponding model clauses in the main body of the document.
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BS 5395-2 gives recommendations for the design of helical and spiral stairs, to be used internally or externally in all types of building constructions.
It covers only stairs which are circular on plan and does not deal with ramps.
BS 5395-2 also gives guidance on the geometry of helical and spiral stairs.
Contents of BS 5395-2:
• Foreword
• Scope
• Definitions
• Alternative materials, components and methods of design and construction
• Materials
• Design
• Fire protection and means of escape
• Load tests
• Design geometry
• Typical layouts for stairs
• Relationship between rise and going
• Measurement of clear width and goings
• Landings
• Maximum gap between column and tread
• Calculation of going
• Calculation of clear headroom
• Structural materials
• Sizes of stairs
• Publications referred to
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Hi friends
I need this article. Please share; Seismic response envelopes of a tank supported at the base
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The Code for Sustainable Homes provides an environmental assessment methodology for certifying the performance of new homes in England and Wales. It encourages a ‘step change’ in building practice that includes energy efficiency as a key element. Buildings are rated on a scale from Level 1 to Level 6,
where Level 6 is the highest.
Since May 2008 it is mandatory for all new homes to be rated (not necessarily assessed) against the Code. Buildings that are not assessed under the Code are awarded a ‘nil-rated’ certificate.
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