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Author : Michio Nishida
Publisher :
ISBN 13 :
Total Pages : 554 pages
Book Rating : 4.:/5 (35 download)
Download or read book Analytical Prediction of Distortion in Welded Structures written by Michio Nishida and published by . This book was released on 1976 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Koichi Masubuchi
Publisher : Elsevier
ISBN 13 : 1483188434
Total Pages : 655 pages
Book Rating : 4.4/5 (831 download)
Download or read book Analysis of Welded Structures written by Koichi Masubuchi and published by Elsevier. This book was released on 2013-10-22 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of Welded Structures: Residual Stresses, Distortion, and their Consequences encompasses several topics related to design and fabrication of welded structures, particularly residual stresses and distortion, as well as their consequences. This book first introduces the subject by presenting the advantages and disadvantages of welded structures, as well as the historical overview of the topic and predicted trends. Then, this text considers residual stresses, heat flow, distortion, fracture toughness, and brittle and fatigue fractures of weldments. This selection concludes by discussing the effects of distortion and residual stresses on buckling strength of welded structures and effects of weld defects on service behavior. This book also provides supplementary discussions on some related and selected subjects. This text will be invaluable to metallurgists, welders, and students of metallurgy and welding.
Author :
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (227 download)
Download or read book Integration of M.I.T. Studies on Prediction and Control of Distortion in Welded Aluminum Structures written by and published by . This book was released on 1976 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers the development of analytical means for predicting and controlling weld distortion of welded aluminum structures. The report presents basic background information and covers the present state-of-the-art by integrating results obtained recently at M.I.T. Distortion in welded structures is caused by three fundamental dimensional changes, namely transverse shrinkage, longitudinal shrinkage and angular change. During the fabrication of actual structures, such as ships, airplanes and buildings which have various types of joints, these dimensional changes are combined. Therefore, shrinkage distortion that occurs in structures can be extremely complex.
Author : Zhili Feng
Publisher : CRC Press
ISBN 13 : 9780849334672
Total Pages : 372 pages
Book Rating : 4.3/5 (346 download)
Download or read book Processes and mechanisms of welding residual stress and distortion written by Zhili Feng and published by CRC Press. This book was released on 2005-11-01 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a fabrication technology, welding presents a number of technical challenges to the designer, manufacturer, and end-user of the welded structures. Both weld residual stress and distortion can significantly impair the performance and reliability of the welded structures. They must be properly dealt with during design, fabrication, and in-service use of the welded structures. There have been many significant and exciting developments on the subject in the past ten to fifteen years. Measurement techniques have been improved significantly. More importantly, the development of computational welding mechanics methods has been phenomenal. The progresses in the last decade or so have not only greatly expanded our fundamental understanding of the processes and mechanisms of residual stress and distortion during welding, but also have provided powerful tools to quantitatively determine the detailed residual stress and distortion information for a given welded structure. New techniques for effective residual stress and distortion mitigations and controls have also been applied in different industry sectors. Processes and Mechanisms of Welding Residual Stress and Distortion provides a comprehensive summary on the developments in the subject. It outlines theoretical treatments on heat transfer, solid mechanics and materials behavior that are essential for understanding and determining the welding residual stress and distortion. The approaches for computational methods and analysis methodology are described so that non specialists can follow them. There are chapters devoted to the discussion of various techniques for control and mitigation of residual stress and distortion, and residual stress and distortion results for various typical welded structures are provided. The second half of the book looks at case studies and practical solutions and provides insights into the techniques, challenges, limitations and future trends of each application. This book will not only be useful for advanced analysis of the subject, but also provide sufficient examples and practical solutions for welding engineers. With a panel of leading experts this authoritative book will be a valuable resource for welding engineers and designers as well as academics working in the fields of structural and mechanical engineering.
Author : Vassilios John Papazoglou
Publisher :
ISBN 13 :
Total Pages : 205 pages
Book Rating : 4.:/5 (183 download)
Download or read book Development of Analytical and Empirical Systems for Parametric Studies of Design and Fabrication of Welded Structures written by Vassilios John Papazoglou and published by . This book was released on 1977 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part I of the report covers the development of a monograph entitled 'Analysis of Design and Fabrication of Welded Structures.' The monograph deals with the prediction of stresses, strains and other effects produced by welding. Part II covers the development of analytical means for predicting and controlling weld distortion in welded aluminum structures. Distortion in welded structures is caused by three fundamental dimensional changes, namely transverse shrinkage, longitudinal shrinkage and angular change. During the fabrication of actual structures, such as ships, airplanes and buildings which have various types of joints, these dimensional changes are combined. Therefore, shrinkage distortion that occurs in structures can be extremely complex. After a brief introduction, Section 2.2 discusses thermal stresses during welding, residual stresses and distortion in a general manner. The subsequent sections up to Section 2. 6 discuss the analytical and experimental investigations carried out at M.I.T. on the prediction of various fundamental types of distortion. Finally, Section 2. 7 deals with methods of distortion reduction, as they were tested by various investigators at M.I.T. (Author).
Author : G Verhaeghe
Publisher : Woodhead Publishing
ISBN 13 : 9781855734449
Total Pages : 106 pages
Book Rating : 4.7/5 (344 download)
Download or read book Predictive Formulae for Weld Distortion written by G Verhaeghe and published by Woodhead Publishing. This book was released on 1999-09-21 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: &Quot;The quantification of the level of distortion that can be expected after welding has become crucial to meet the increasingly stringent accuracy requirements for the design of any type of fabricated component or structure. Many research workers have formulated weld distortion prediction models in order to reduce the extent of practical trials required to determine actual distortion. Because of the large number of prediction models available, some guidance is required on the selection of appropriate models for a particular welding application. For this reason, this review of published weld prediction formulae has been carried out within the Core Research Programme of TWI. Whilst reviews have been carried out in the past, this summary differs in that it covers four types of distortion - longitudinal shrinkage, bowing distortion, transverse shrinkage and angular distortion. It provides a critical assessment of each of the models; highlighting where background information exists, whether the model has been validated and possible limitations. Based on the information available for each of the models and on TWI's knowledge and experience, one or more models are recommended for each type of distortion."--BOOK JACKET.
Author : M. Bartek
Publisher :
ISBN 13 :
Total Pages : 77 pages
Book Rating : 4.:/5 (227 download)
Download or read book Analytical Modelling of Structural Distortion in Ship Structures Produced by Welding written by M. Bartek and published by . This book was released on 1980 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this research was to apply and further develop where necessary the technology for predicting distortion of submarine structure due to welding. The underlying motivation in providing this technology is that it can be used in design and construction of submarines to help determine the most cost effective weld joint designs and welding procedures. The specific objectives of the initial contract were: (1) implementation of MIT finite element computer programs for prediction of temperatures, residual stresses, and distortion due to welding; (2) evaluation of MIT computer programs on a fusion weld of two plates and comparison with results obtained by MARC-CDC finite element program; and (3) analysis of a butt welded unrestrained plate with MIT computer codes and comparison with test results. (Author).
Author : Zalman Philip Saperstein
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (4 download)
Download or read book Control of Distortion and Residual Stress in Weldments written by Zalman Philip Saperstein and published by . This book was released on 1977 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wentao Cheng
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (651 download)
Download or read book In-plane Shrinkage Strains and Their Effects on Welding Distortion in Thin-wall Structures written by Wentao Cheng and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: It is difficult to achieve both fast and accurate distortion predictions in large welded structures. This research work was conducted to obtain better understanding and characterization of the plastic deformation that leads to in-plane shrinkage in thin-wall structures. It also aimed to develop a fast and accurate approach for predicting the welding distortion in large thin-wall structures, such automotive body structures. The finite element analysis (FEA) was the tool used in this work to study welding plastic deformation. Before finite element (FE) simulations were carried out for this purpose, a proper FE model was formulated and verified with experiments so that it was capable of rendering accurate distortion computation as well as capturing all the data necessary to investigate the plastic deformation. After verified by the experimental results, the FE model was utilized to perform the welding simulations of three types of simple joints including butt-welded plates, Tee joint, and plate with slot weld. The analysis results were extracted and analyzed to study the in-plane shrinkage and plastic behaviors. The plastic strain distributions were examined in combination with the peak temperatures experienced during welding and the material softening at elevated temperatures. The in-plane shrinkage was correlated to the distribution characteristics of plastic strains, and furthermore the relationships between the plastic strains and their influencing factors were established. The engineering approach was developed based on the findings obtained from the study described above. The research issue of central importance in developing the engineering approach was how to introduce the plastic deformation equivalent to the actual one into the FE model. Temperature load was used in this study and then the central issue became formulating the temperature load, namely its distribution including area of application and magnitude. The engineering approach was then used to predict the welding distortions of two automotive body structures. The predicted distortions were compared with the measurements and excellent agreements existed between them.
Author : Raja Ram Mohan Rao
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.:/5 (71 download)
Download or read book Prediction of Weld Distortion and Thermal Stress Analysis on Sheet Metals Using Finite Element Analysis written by Raja Ram Mohan Rao and published by . This book was released on 2005 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Author's abstract] Deformations and stresses induced in plates due to high temperatures represent a major concern in various structural applications. The stringent requirement of designs and to have lower production costs, these deformations needs to be addressed. In welding process, one approach used to minimize deformation is to provide sufficient clamps where the warping will be expected to occur. This takes lot of experience to know where the required tooling is to be applied and thus increases the overall cost. Avoiding clamping during the welding process would result in obvious deformations necessitating modification of the assembly process and increasing the manufacturing time. Therefore, many industries have concluded that there is a strong need for some technique that would predict the places where the sheet metal distortion would occur and reduce or eliminate the need for redundant tooling. The purpose of this study is to examine the feasibility of predicting the location and range of deformations due high temperature differences occurring during welding process. This is done, in part, to try to do effective tool design for clamping purpose. The study was performed using PRO/Mechanica package. The actual deformations occurring on the plate were measured manually to validate the simulation. As the results show, the suggested method of analysis can be used to a considerable degree of accuracy.
Author : Pan Michaleris
Publisher : Elsevier
ISBN 13 : 0857092901
Total Pages : 319 pages
Book Rating : 4.8/5 (57 download)
Download or read book Minimization of Welding Distortion and Buckling written by Pan Michaleris and published by Elsevier. This book was released on 2011-05-25 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding is a cost-effective and flexible method of fabricating large structures, but drawbacks such as residual stress, distortion and buckling must be overcome in order to optimize structural performance. Minimization of welding distortion and buckling provides a systematic overview of the methods of minimizing distortion and buckling in welded structures. Following an introductory chapter, part one focuses on understanding welding stress and distortion, with chapters on such topics as computational welding mechanics, modelling the effect of phase transformations on welding stress and distortion and using computationally efficient reduced-solution methods to understand welding distortion. Part two covers different methods of minimizing welding distortion. Chapters discuss methods such as differential heating for minimizing distortion in welded stiffeners, dynamic thermal tensioning, reverse-side heating and ways of minimizing buckling such as weld cooling and hybrid laser arc welding. With its distinguished editor and international team of contributors, Minimization of welding distortion and buckling is an essential reference for all welders and engineers involved in fabrication of metal end-products, as well as those in industry and academia with a research interest in the area. Provides a systematic overview of the methods of minimizing distortion and buckling in welded structures Focuses on understanding welding stress and distortion featuring computational welding mechanics and modelling the effect of phase transformations Explores different methods of minimizing welding distortion discussing differential heating and dynamic thermal tensioning
Author : G. Ravichandran
Publisher : CRC Press
ISBN 13 : 1000165094
Total Pages : 237 pages
Book Rating : 4.0/5 (1 download)
Download or read book Finite Element Analysis of Weld Thermal Cycles Using ANSYS written by G. Ravichandran and published by CRC Press. This book was released on 2020-08-02 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite Element Analysis of Weld Thermal Cycles Using ANSYS aims at educating a young researcher on the transient analysis of welding thermal cycles using ANSYS. It essentially deals with the methods of calculation of the arc heat in a welded component when the analysis is simplified into either a cross sectional analysis or an in-plane analysis. The book covers five different cases involving different welding processes, component geometry, size of the element and dissimilar material properties. A detailed step by step calculation is presented followed by APDL program listing and output charts from ANSYS. Features: Provides useful background information on welding processes, thermal cycles and finite element method Presents calculation procedure for determining the arc heat input in a cross sectional analysis and an in-plane analysis Enables visualization of the arc heat in a FEM model for various positions of the arc Discusses analysis of advanced cases like dissimilar welding and circumferential welding Includes step by step procedure for running the analysis with typical input APDL program listing and output charts from ANSYS.
Author : Lars-Erik Lindgren
Publisher : Elsevier
ISBN 13 : 1845693558
Total Pages : 246 pages
Book Rating : 4.8/5 (456 download)
Download or read book Computational Welding Mechanics written by Lars-Erik Lindgren and published by Elsevier. This book was released on 2014-01-23 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational welding mechanics (CWM) provides an important technique for modelling welding processes. Welding simulations are a key tool in improving the design and control of welding processes and the performance of welded components or structures. CWM can be used to model phenomena such as heat generation, thermal stresses and large plastic deformations of components or structures. It also has a wider application in modelling thermomechanical and microstructural phenomena in metals. This important book reviews the principles, methods and applications of CWM. The book begins by discussing the physics of welding before going on to review modelling methods and options as well as validation techniques. It also reviews applications in areas such as fatigue, buckling and deformation, improved service life of components and process optimisation. Some of the numerical methods described in the book are illustrated using software available from the author which allows readers to explore CWM in more depth. Computational welding mechanics is a standard work for welding engineers and all those researching welding processes and wider thermomechanical and microstructural phenomena in metals. Highlights the principles, methods and applications of CWM Discusses the physics of welding Assesses modelling methods and validation techniques
Author : Nisith R. Mandal
Publisher : Alpha Science International, Limited
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.3/5 (91 download)
Download or read book Welding and Distortion Control written by Nisith R. Mandal and published by Alpha Science International, Limited. This book was released on 2004 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding and Distortion Control illustrates various welding methods with particular focus on shipbuilding, namely Sheet Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW), Gas Tungsten Arc Welding (GTAW), Submerged Arc Welding (SAW) and Electro-slag along with single side and multi-electrode welding techniques. The chapter on welding distortion starts by explaining the distortion mechanism and subsequently introduces various types of distortions encountered and their prediction methods. Suitable distortion prediction tools have been explained to help welding engineers and structural designers to implement effective distortion control measures and to make production friendly designs for achieving the goal of near zero distortion in fabricated structures which will eliminate to a great extent the tedious post weld fairing work.
Author : Ninshu Ma
Publisher : Elsevier
ISBN 13 : 0123948207
Total Pages : 313 pages
Book Rating : 4.1/5 (239 download)
Download or read book Welding Deformation and Residual Stress Prevention written by Ninshu Ma and published by Elsevier. This book was released on 2012-04-26 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Generally, welding produces welding deformation and residual stress in the products, which influences the quality and performance of the products. Although many engineers and researchers have made great effort how to control these incidents, they have still remained unresolved. Welding Deformation and Residual Stress Prevention provides a unique computational approach to the prediction of the effects of deformation and residual stress on materials. The goal is to provide engineers and designers with the ability to create their own computational system for predicting and possibly avoiding the problem altogether. The basic theories including "theory of elastic-plastic analysis" and "inherent strain theory" , and analysis procedures are described using a simple three-bar model Online simulation software to perform basic analysis on welding mechanics Examples of strategic methods and procedures are illustrated to have solved various welding-related problems encountered in the process of construction Appendices present data bases for welding residual stresses, temperature dependent material properties, etc.
Author : John Paul Mabry
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (227 download)
Download or read book Prediction and Control of Residual Stresses and Distortion in HY-130 Thick Pipe Weldments written by John Paul Mabry and published by . This book was released on 1979 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to validate existing techniques for computer simulation of the welding process, an experiment is designed and carried out in which seam and girth welds are produced on a high strength steel cylinder. Fabrication of the HY-130 cylinder, selection of welding parameters for the seam and girth welds, and the selection and arrangement of instrumentation are described. The theoretical background of finite element computer simulation of heat flow in weldments as well as techniques for axisymmetric finite element analysis of thermal stress and metal movement during welding are discussed. Finite element representation of weldment geometry for heat flow and stress analysis is presented. Metallurgical properties of the HY-130 cylinder seam weld are presented in the form of photo-micrographs and electron scan micrographs. Temperature, strain, and radial distortion are measured at various locations on the HY-130 cylinder and the measured values are compared.
Author : Paolo Ferro
Publisher : BoD – Books on Demand
ISBN 13 : 178923106X
Total Pages : 164 pages
Book Rating : 4.7/5 (892 download)
Download or read book Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments written by Paolo Ferro and published by BoD – Books on Demand. This book was released on 2018-05-16 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to quantify residual stresses induced by welding processes through experimentation or numerical simulation has become, today more than ever, of strategic importance in the context of their application to advanced design. This is an ongoing challenge that commenced many years ago. Recent design criteria endeavour to quantify the effect of residual stresses on fatigue strength of welded joints to allow a more efficient use of materials and a greater reliability of welded structures. The aim of the present book is contributing to these aspects of design through a collection of case-studies that illustrate both standard and advanced experimental and numerical methodologies used to assess the residual stress field in welded joints. The work is intended to be of assistance to designers, industrial engineers and academics who want to deepen their knowledge of this challenging topic.
