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Fundamentals of Evaluation and Diagnostics of Welded Structures


Author: A Nedoseka

Publisher: Woodhead Publishing

Publish Date: 31st August 2012

ISBN-13: 9780857097576

Pages: 670

Language: English



Fundamentals of Evaluation and Diagnostics of Welded Structures provides an essential guide to the key principles and problems involved in the analysis of welded structures. Chapter one discusses design issues, key equations and calculations, and the effects of varied heat sources in relation to the temperature field in welding. Chapter two goes on to explore welding stresses and strains. Fracture mechanics and the load-carrying capacity of welded structures are the focus of chapter three. Chapter four considers diagnostics and prediction of the residual life of welded structures, whilst acoustic emission techniques for the analysis of welded structures are reviewed in chapter five. Finally, chapter six supplies supplementary information on numerical techniques and other tests for welded structures.With its distinguished author and detailed coverage, Fundamentals of evaluation and diagnostics of welded structures is an indispensable guide for welding and structural engineers as well as those researching this important topic.

Table of Contents

Editor’s foreword Introduction Chapter 1: The temperature field in welding 1 General 2 Brief information on the theory of integral transformations 3 Thermal conductivity equation 4 Examples of temperature field calculation in welding 5 Continuous and moving heat sources 6 Dependence of temperature fields in welding on some of the process features Chapter 2: Welding stresses and strains 1 Thermophysical and mechanical properties of materials 2 Welding stresses and strains at concentrated heating 3 Residual stresses in butt welding and patches welding-in 4 Integral transformations and numerical methods for solving temperature problems 5 Welding stresses and strains in a three-axial stress state 6 Principal estimated dependences used in measurement of thermophysical and mechanical quantities 7 Measurement of residual stresses and strains 8 Measurement errors Chapter 3: Load-carrying capacity of welded structures 1 Peculiarities of calculation of strength of welded joints containing different defects, under different external conditions and using different loading methods 2 Elements of fracture mechanics 3 Pre-fracture state and fracture of welded joints and materials 4 Elements of quantum fracture mechanics 5 Bending of round plate with residual stresses 6 Method of fictitious forces to solve problems of stability of plates containing welds 7 Variation and energy methods used in problems of stability of plates 8 Welding strains and distortions Chapter 4: Diagnostics and prediction of the residual life of welded structures 1 General problems of technical diagnostics 2 Strength prediction methods 3 Diagnostics and residual life of structures 4 Estimation of life of structure materials by the acoustic emission method Chapter 5: Acoustic emission techniques for the analysis of welded structures 1 The essence of acoustic emission 2 Theoretical issues of acoustic emission 3 Acoustic emission equipment 4 Application of acoustic emission Chapter 6: Supplementary sections: Numerical techniques and tests for welded structures 1 Method for mathematical processing of test results 3 Basic statistical characteristics of dependences of parameters of the investigated processes 4 Method for processing measurement results in finding the random quantities distribution law 5 Method for determination of theoretical dependences 2 Estimation of errors of numerical calculations 3 Empirical formulas 2 Selection of empirical formulas 3 Formulas and plots for some approximate dependences (Fig. 6.5)4 4 Mechanical and technological tests of materials 5 Stressed state of pressure vessels 6 Stress concentration Appendices: Properties and formulae for the evaluation of welded structures Recommended literature Main symbols and abbreviations Index Colour Plates