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Thermoelastic Deformations

Thermoelastic Deformations
Author: D. Iesan
Publisher: Springer Science & Business Media
Total Pages: 317
Release: 2013-06-29
Genre: Science
ISBN: 9401735174

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The theory of thermoelasticity studies the interaction between thermal and mechan ical fields in elastic bodies. This theory is of interest both for the mathematical and technical point of view. Intense interest has been shown recently in this field owing to the great practical importance of dynamical effects in aeronautics, nu clear reactors, and its potential importance in cryogenic applications. This work is concerned mainly with basic problems of the theory of thermoelasticity. Ther moelasticity of polar materials and the theories of thermoelasticity with finite wave speeds are not considered here. The reader interested in these subjects will find a full account in the works of Nowacki [280], Chandrasekharaiah [60] and Ignaczak [195]. Our purpose in this work is to present a systematic treatment of some results established in the theory of thermoelasticity. On the whole, the subject matter is directed towards recent developments. Chapter 1 is concerned mainly with the development of the fundamental equa tions of the theory of thermoelasticity. The kinematics and primitive concepts associated with the basic principles are developed and emphasized only to the ex tent that they are needed in our treatment of the subject. Chapter 2 is devoted to a study of linear thermoelastic deformations for prestressed bodies. We have at tempted to isolate those conceptual and mathematical difficulties which arise over and above those inherent in the problems concerned with unstressed bodies.


Thermo-Mechanically Coupled Cyclic Deformation and Fatigue Failure of NiTi Shape Memory Alloys

Thermo-Mechanically Coupled Cyclic Deformation and Fatigue Failure of NiTi Shape Memory Alloys
Author: Guozheng Kang
Publisher: Springer Nature
Total Pages: 312
Release: 2023-07-24
Genre: Technology & Engineering
ISBN: 9819927528

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Written by leading experts in the field, this book highlights an authoritative and comprehensive introduction to thermo-mechanically coupled cyclic deformation and fatigue failure of shape memory alloys. The book deals with: (1) experimental observations on the cyclic deformation and fatigue failure in the macroscopic and microscopic scales; (2) molecular dynamics and phase-field simulations for the thermo-mechanical behaviors and underlying mechanisms during cyclic deformation; (3) macroscopic phenomenological and crystal plasticity-based cyclic constitutive models; and (4) fatigue failure models. This book is an important reference for students, practicing engineers and researchers who study shape memory alloys in the areas of mechanical, civil and aerospace engineering as well as materials science.


Plane Thermoelastic Deformation of Internally Heated Annular Disks Or Hollow Cylinders

Plane Thermoelastic Deformation of Internally Heated Annular Disks Or Hollow Cylinders
Author: Franklyn B. Fuller
Publisher:
Total Pages: 52
Release: 1966
Genre: Elastic analysis (Engineering)
ISBN:

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A plane elastic problem of bodies bounded by concentric circles and heated at the inner boundary is solved in the "uncoupled, quasi-static" approximation. The heating takes place by surface heat transfer, with limiting cases corresponding to sudden temperature change and to constant flux of heat. The stress boundary conditions treated are those of constant flux of heat. The stress boundary conditions treated are those of constant pressure at the inner wall while the outer wall may be either free or rigidly restrained. The time-dependent results for stresses, displacement, and temperature are calculated and shown for several cases with varying values for the parameters specifying heat transfer and wall thickness. The effect of varying Poisson's ratio is also examined. Formulas for steady-state distributions of the quantities of interest are also given, as well as some approximate results that can be used for very small times.


Simulation of Thermoelastic Behaviour of Spacecraft Structures

Simulation of Thermoelastic Behaviour of Spacecraft Structures
Author: Simon Appel
Publisher: Springer Nature
Total Pages: 399
Release: 2021-08-31
Genre: Technology & Engineering
ISBN: 3030789993

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This book provides recommendations for thermal and structural modelling of spacecraft structures for predicting thermoelastic responses. It touches upon the related aspects of the finite element and thermal lumped parameter method. A mix of theoretical and practical examples supports the modelling guidelines. Starting from the system needs of instruments of spacecraft, the reader is supported with the development of the practical requirements for the joint development of the thermal and structural models. It provides points of attention and suggestions to check the quality of the models. The temperature mapping problem, typical for spacecraft thermoelastic analysis, is addressed. The principles of various temperature mapping methods are presented. The prescribed average temperature method, co-developed by the authors, is discussed in detail together with its spin-off to provide high quality conductors for thermal models. The book concludes with the discussion of the application of uncertainty assessment methods. The thermoelastic analysis chain is computationally expensive. Therefore, the 2k+1 point estimate method of Rosenblueth is presented as an alternative for the Monte Carlo Simuation method, bringing stochastic uncertainty analysis in reach for large thermoelastic problems.


Nonclassical Thermoelastic Problems in Nonlinear Dynamics of Shells

Nonclassical Thermoelastic Problems in Nonlinear Dynamics of Shells
Author: Jan Awrejcewicz
Publisher: Springer Science & Business Media
Total Pages: 432
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 3642556779

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From the reviews: "A unique feature of this book is the nice blend of engineering vividness and mathematical rigour. [...] The authors are to be congratulated for their valuable contribution to the literature in the area of theoretical thermoelasticity and vibration of plates." Journal of Sound and Vibration


Thermoelastic Models of Continua

Thermoelastic Models of Continua
Author: D. Iesan
Publisher: Springer Science & Business Media
Total Pages: 309
Release: 2013-03-19
Genre: Science
ISBN: 1402023103

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This volume is concerned with the basic problems of the theory of thermoelasticity for three models of continuous bodies: materials with voids, micropolar solids and nonsimple bodies. Beginning with the basic laws of thermodynamics, the theory of thermoelastic materials with voids is treated. Two subsequent chapters cover the analysis of the linear theory of micropolar thermoelastic bodies. The book concludes with a study of nonsimple thermoelastic materials, which are characterised by the inclusion of higher gradients of displacement in the basic postulates. Relevant examples and exercises which illustrate the theory are given throughout the text. The book should be of interest to mathematicians and specialists working in the fields of elasticity, thermoelasticity, civil engineering and geophysics.


Machine Tools Production Systems 2

Machine Tools Production Systems 2
Author: Christian Brecher
Publisher: Springer Nature
Total Pages: 850
Release: 2021-11-08
Genre: Technology & Engineering
ISBN: 3662608634

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The first part of this volume provides the user with assistance in the selection and design of important machine and frame components. It also provides help with machine design, calculation and optimization of these components in terms of their static, dynamic and thermoelastic behavior. This includes machine installation, hydraulic systems, transmissions, as well as industrial design and guidelines for machine design. The second part of this volume deals with the metrological investigation and assessment of the entire machine tool or its components with respect to the properties discussed in the first part of this volume. Following an overview of the basic principles of measurement and measuring devices, the procedure for measuring them is described. Acceptance of the machine using test workpieces and the interaction between the machine and the machining process are discussed in detail. The German Machine Tools and Manufacturing Systems Compendium has been completely revised. The previous five-volume series has been condensed into three volumes in the new ninth edition with color technical illustrations throughout. This first English edition is a translation of the German ninth edition.


Computer-Assisted Management and Control of Manufacturing Systems

Computer-Assisted Management and Control of Manufacturing Systems
Author: Spyros G. Tzafestas
Publisher: Springer Science & Business Media
Total Pages: 504
Release: 2012-12-06
Genre: Technology & Engineering
ISBN: 1447109597

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Modem manufacturing systems involve many processes and operations that can be monitored and controlled at several levels of intelligence. At the highest level there is a computer that supervises the various manufacturing functions, whereas at the lowest level there are stand alone computer controlled systems of manufacturing processes and robotic cells. Until recenty computer-aided manufacturing systems constituted isolated "islands" of automation, each oriented to a particular application, but present day systems offer integrated approaches to manufacturing and enterprise operations. These modem systems, known as computer-integrated manufacturing (CIM) systems, can easily meet the current performance and manufacturing competitiveness requirements under strong environmental changes. CIM systems are much of a challenge, and imply a systemic approach to the design and operation of a manufacturing enterprise. Actualy, a CIM system must take into account in a unified way the following three views : the user view, the technology view, and the enterprise view. This means that CIM includes both the engineering and enterprise planning and control activities, as well as the information flow activities across all the stages of the system.