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| Author | : Jun Sun |
| Publisher | : |
| Total Pages | : |
| Release | : 2005 |
| Genre | : |
| ISBN | : |
| Author | : Paolo Ferro |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 164 |
| Release | : 2018-05-16 |
| Genre | : Technology & Engineering |
| ISBN | : 178923106X |
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.
| Author | : Pan Michaleris |
| Publisher | : Elsevier |
| Total Pages | : 319 |
| Release | : 2011-05-25 |
| Genre | : Technology & Engineering |
| ISBN | : 0857092901 |
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 | : Wentao Cheng |
| Publisher | : |
| Total Pages | : |
| Release | : 2005 |
| Genre | : Deformations (Mechanics) |
| ISBN | : |
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 | : G Verhaeghe |
| Publisher | : Woodhead Publishing |
| Total Pages | : 106 |
| Release | : 1999-09-21 |
| Genre | : Technology & Engineering |
| ISBN | : 9781855734449 |
&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 | : Tarasankar DebRoy, Stan A. David, John N. DuPont, Toshihiko Koseki, Harry K. Bhadeshia |
| Publisher | : ASM International |
| Total Pages | : 1117 |
| Release | : 2013-03-01 |
| Genre | : Technology & Engineering |
| ISBN | : 1627089985 |
The Trends conference attracts the world's leading welding researchers. Topics covered in this volume include friction stir welding, sensing, control and automation, microstructure and properties, welding processes, procedures and consumables, weldability, modeling, phase transformations, residual stress and distortion, physical processes in welding, and properties and structural integrity of weldments.
| Author | : Lucas F. M. da Silva |
| Publisher | : Elsevier |
| Total Pages | : 402 |
| Release | : 2020-10-31 |
| Genre | : Technology & Engineering |
| ISBN | : 0128208872 |
Advanced Joining Processes: Welding, Plastic Deformation, and Adhesion brings together a range of advanced thermal, mechanical, and chemical methods of joining, offering an up-to-date resource for those looking to understand and utilize the very latest techniques. Efficient joining techniques are critical to a range of innovative applications, with technology in constant development. The first section of the book provides in-depth information on advanced welding techniques, including friction stir, explosive, ultrasonic, laser, electron beam, and computational weld analysis and fatigue of structures. The second section highlights key developments in joining by plastic deformation, adhesive bonding, and hybrid joining. The coverage of each technique is supported by practical guidance, detailed analysis, and finite element simulations. This is an essential reference for researchers and advanced students in joining, welding, adhesion, materials processing, mechanical engineering, plastics engineering, manufacturing, civil engineering, and automotive/aerospace engineering, as well as engineers, scientists, and R&D professionals, using joining, welding, and adhesion methods, across a range of industries. Presents the latest research findings and developments across welding, joining by plastic deformation, and adhesion Includes state-of-the-art methods, such as laser, ultrasonic and electron beam welding, hybrid joining, and the use of electromagnetic pulses Offers practical guidance, detailed analysis, and finite element simulations, for all techniques covered
| Author | : Gkatzogiannis, Stefanos |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 316 |
| Release | : 2022-06-30 |
| Genre | : Technology & Engineering |
| ISBN | : 3731510669 |
Research goal of the present monograph is the establishment of an efficient engineering approach, which will include straightforward but accurate simulation models, in order to estimate the residual stress fields of welded joints introduced during welding and their post-weld treatment with High Frequency Hammer Peening. The present subject lies on the intersection of structural engineering, material science and computational mechanics.
| Author | : Stan A. David |
| Publisher | : ASM International |
| Total Pages | : 1015 |
| Release | : 2006-01-01 |
| Genre | : Technology & Engineering |
| ISBN | : 1615031081 |
| Author | : Koichi Masubuchi |
| Publisher | : Pergamon |
| Total Pages | : 1026 |
| Release | : 1980 |
| Genre | : Deformations (Mechanics) |
| ISBN | : |
