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Non Local Structural Mechanics

Author: Tony Murmu
Publisher: John Wiley & Sons
ISBN: 1848215223
Size: 37.56 MB
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Serving as a review on non-local mechanics, this book provides an introduction to non-local elasticity theory for static, dynamic and stability analysis in a wide range of nanostructures. The authors draw on their own research experience to present fundamental and complex theories that are relevant across a wide range of nanomechanical systems, from the fundamentals of non-local mechanics to the latest research applications.

Fluid Structure Interactions And Uncertainties

Author: Abdelkhalak El Hami
Publisher: John Wiley & Sons
ISBN: 1848219393
Size: 36.28 MB
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The field of fluid—structure interactions groups together the study of all phenomena that present the coupling of the movement of a structure with that of a fluid. This is the mutuel interaction that can link a fluid domain to its surrounding structure. The range of phenomena studied is very wide, from the study of vibrating cylinders in flows, as is the case in the nuclear industry, to vibrating structures in turbulent flows, and to free surface phenomena in reservoirs. This book deals with the different aspects of fluid-structure interaction — vibro-acoustic and aerodynamic — by reducing the coupled fluid-structure model. Uncertainties are present in the study of the latter. An entire chapter is reserved for reliability-based design optimization (RBDO). The calculation tools used are : Ansys for the calculation of structures and Fluent for the calculation of fluids. For the examples processed using Ansys, the computer software is provided. Accompanied by detailed examples and including uncertainties, optimization and reliability, Fluid—Structure Interactions and Uncertainties presents the new, most effective design tools. The book is intended for engineering students and is a valuable support for practicing engineers and teacher-researchers.

Experimental Mechanics Of Solids And Structures

Author: Jérà ́me Molimard
Publisher: John Wiley & Sons
ISBN: 111929231X
Size: 64.41 MB
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From the characterization of materials to accelerated life testing, experimentation with solids and structures is present in all stages of the design of mechanical devices. Sometimes only an experimental model can bring the necessary elements for understanding, the physics under study just being too complex for an efficient numerical model. This book presents the classical tools in the experimental approach to mechanical engineering, as well as the methods that have revolutionized the field over the past 20 years: photomechanics, signal processing, statistical data analysis, design of experiments, uncertainty analysis, etc. Experimental Mechanics of Solids and Structures also replaces mechanical testing in a larger context: firstly, that of the experimental model, with its own hypotheses; then that of the knowledge acquisition process, which is structured and robust; finally, that of a reliable analysis of the results obtained, in a context where uncertainty could be important.

Fractional Calculus With Applications In Mechanics

Author: Teodor M. Atanackovic
Publisher: John Wiley & Sons
ISBN: 1118577469
Size: 19.57 MB
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This book contains mathematical preliminaries in which basic definitions of fractional derivatives and spaces are presented. The central part of the book contains various applications in classical mechanics including fields such as: viscoelasticity, heat conduction, wave propagation and variational Hamilton–type principles. Mathematical rigor will be observed in the applications. The authors provide some problems formulated in the classical setting and some in the distributional setting. The solutions to these problems are presented in analytical form and these solutions are then analyzed numerically. Theorems on the existence of solutions will be presented for all examples discussed. In using various constitutive equations the restrictions following from the second law of thermodynamics will be implemented. Finally, the physical implications of obtained solutions will be discussed in detail.

Granular Materials At Meso Scale

Author: Bernard Cambou
Publisher: Elsevier
ISBN: 008101077X
Size: 58.65 MB
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Granular Materials at Meso-scale: Towards a Change of Scale Approach proposes a new way for developing an efficient change of scale—considering a meso-scale defined at the level of local arrays of particles. The change of scale is known to be a very interesting way to improve the modelling of mechanical behavior granular materials. In the past, studies have been proposed using a micro-scale at the grain level to perform change of scale, but limitations have been proven for these approaches. Definition and analysis of the phases are detailed, constituted by sets of meso-domains sharing the same texture characteristics. The authors propose a local constitutive model for the phases, allowing the constitutive model of the representative elementary volume to be definied from a change-of-scale approach and, finally, presenting the validation of obtained modeling on cyclic loadings. Proposes a new way for developing an efficient change of scale—considering a meso-scale Explores local meso-domains and texture characteristics Defines meso-strain and stress Analyzes the evolution of these variables and texture characteristics in relation to the applied loading

Electrohydraulic Fracturing Of Rocks

Author: Christian La Borderie
Publisher: John Wiley & Sons
ISBN: 111903552X
Size: 11.11 MB
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This book presents a new fracturing technique that should be considered as a potential alternative, or a companion technique, to hydraulic fracturing of tight gas reservoirs and low permeability rock masses. As opposed to hydraulic fracturing which generates a few numbers of large cracks, electro-hydraulic fracturing induces diffuse micro-cracking and fragmentation of rocks. Laboratory tests demonstrate that increases of permeability by two orders of magnitude can be reached, without major cracking in tested specimens. This book discusses the principles of this new technique, reports experiments which have been developed is order to prove the concept and finally describes the numerical model from which the potentialities of this technique in representative reservoir conditions can be assessed.

Structural Dynamic Analysis With Generalized Damping Models

Author: Sondipon Adhikari
Publisher: John Wiley & Sons
ISBN: 9781848215214
Size: 57.42 MB
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Since Lord Rayleigh introduced the idea of viscous damping in his classic work "The Theory of Sound" in 1877, it has become standard practice to use this approach in dynamics, covering a wide range of applications from aerospace to civil engineering. However, in the majority of practical cases this approach is adopted more for mathematical convenience than for modeling the physics of vibration damping. Over the past decade, extensive research has been undertaken on more general "non-viscous" damping models and vibration of non-viscously damped systems. This book, along with a related book Structural Dynamic Analysis with Generalized Damping Models: Identification, is the first comprehensive study to cover vibration problems with general non-viscous damping. The author draws on his considerable research experience to produce a text covering: dynamics of viscously damped systems; non-viscously damped single- and multi-degree of freedom systems; linear systems with non-local and non-viscous damping; reduced computational methods for damped systems; and finally a method for dealing with general asymmetric systems. The book is written from a vibration theory standpoint, with numerous worked examples which are relevant across a wide range of mechanical, aerospace and structural engineering applications. Contents 1. Introduction to Damping Models and Analysis Methods. 2. Dynamics of Undamped and Viscously Damped Systems. 3. Non-Viscously Damped Single-Degree-of-Freedom Systems. 4. Non-viscously Damped Multiple-Degree-of-Freedom Systems. 5. Linear Systems with General Non-Viscous Damping. 6. Reduced Computational Methods for Damped Systems