Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Thermo Mechanical Modeling Of Laser Mag Hybrid Welding And Consequences On Large Structure
Download Thermo Mechanical Modeling Of Laser Mag Hybrid Welding And Consequences On Large Structure full books in PDF, epub, and Kindle. Read online Thermo Mechanical Modeling Of Laser Mag Hybrid Welding And Consequences On Large Structure ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Thermo-mechanical Modeling of Laser-MAG Hybrid Welding and Consequences on Large Structure by : Ludovic Koundé
Download or read book Thermo-mechanical Modeling of Laser-MAG Hybrid Welding and Consequences on Large Structure written by Ludovic Koundé and published by . This book was released on 2012 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding induces local residual stress and strain in workpiece joining. These local phenomena lead to distortions in the workpieces and aspect defaults. The consequence is aspect defaults (distortions), which can be corrected by heating and hammering. When the assembled elements have large dimensions and need many joints executed by welding sequences, the aspect defaults can be created by non-optimized sequences. The focus of this study is the optimization of joint sequences (through the numerical simulation of sequences) to minimize distortions induced in wall train shell car manufacturing. The parts are assembled with hybrid laser-MAG welding technology. The metallurgical transformations of the material microstructure are taken into account. A new analytical function called "diaboloïd" has been developed to reproduce the morphology of the molten zone and the heat affected zone created by the laser welding. This analytical function is associated with the double ellipsoid analytical function in order to model the laser-arc hybrid welding process. The material thermo-physical properties according to temperature and phase transformation are taken into account in the numerical model. Experimental measurements (cooling rate, residual stresses) have been done in order to correlate numerical and experimental results. The effects of clamping conditions and tack welds are also considered in the numerical model. All these developments made it possible to reduce the displacement of large structures by a factor of 5.
Book Synopsis Hybrid Laser-Arc Welding by : F O Olsen
Download or read book Hybrid Laser-Arc Welding written by F O Olsen and published by Elsevier. This book was released on 2009-06-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid laser-arc welding (HLAW) is a combination of laser welding with arc welding that overcomes many of the shortfalls of both processes. This important book gives a comprehensive account of hybrid laser-arc welding technology and applications.The first part of the book reviews the characteristics of the process, including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality. Part two discusses applications of the process to such metals as magnesium alloys, aluminium and steel as well as the use of hybrid laser-arc welding in such sectors as ship building and the automotive industry.With its distinguished editor and international team of contributors, Hybrid laser-arc welding is a valuable source of reference for all those using this important welding technology. - Reviews arc and laser welding including both advantages and disadvantages of the hybrid laser-arc approach - Explores the characteristics of the process including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality - Examines applications of the process including magnesium alloys, aluminium and steel with specific focus on applications in the shipbuilding and automotive industries
Book Synopsis Thermo-mechanical Modeling of Welding Process by Finite Element Method by : Ruiwen Zhao
Download or read book Thermo-mechanical Modeling of Welding Process by Finite Element Method written by Ruiwen Zhao and published by . This book was released on 1995 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermo-mechanical Modeling of Metallic Substrates Around Laser-induced Melt Pools by : Yi Shu
Download or read book Thermo-mechanical Modeling of Metallic Substrates Around Laser-induced Melt Pools written by Yi Shu and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing (AM) has introduced new possibilities of creating sophisticated designs and structures. Selective Laser Melting (SLM) is an AM technique where structures are fabricated by selectively melting and fusing powder layers. In SLM, melt pools are induced by a laser beam moving on the top surface of a substrate submerged in a powder bed. Mechanical properties of additively manufactured metallic parts are known to be strongly affected by thermal histories, and residual stresses arise due to large temperature gradients. Thermo-mechanical models would help to gain information about both, which is usually hard to obtain. This thesis focuses on examining how well thermal histories and residual stresses in metallic substrates around laser-induced melt pools can be computed by thermo-mechanical models, through experiments on substrates of 17-4PH Stainless Steel (SS) and Ti-6Al-4V. In the first set of experiments, one of two different laser beams moves with constant velocity and power over substrates of 17-4PH SS or Ti-6Al-4V. The substrates are sectioned and etched to expose melt pool traces. In the second set of experiments, single-pass lasers move with constant velocity and power on top surfaces of 17-4PH SS substrates. The time evolution of the deflection of substrates are recorded with a high speed camera. Two types of heat transfer models (accounting for and not accounting for convective heat transfer through fluid flow) reproduced the melt pool traces in the first set of experiments. Predicted thermal histories were critically analyzed. As an extension, how well the model accounting for convective heat transfer reproduced the effect of a substrate edge on the melt pool was examined. Later, the model without convective heat transfer was applied to real-time ultrasonic monitoring of a melt pool in metallic substrates. For the second set of experiments, the model based on heat conduction and elasto-viscoplasticity reproduced the time evolution of deflection of 17-4PH SS substrates. The contributions of this thesis are as follows. Through experiments with various combinations of laser power, scanning speed, power density distribution and metallic material, we show that simply reproducing melt pool traces is insufficient to determine thermal histories. Specifically, for a non-axisymmetric laser beam, three-dimensional melt pool shapes can be disparate even if their two-dimensional traces are very similar. Convective heat transfer in laser-induced melt pools cannot be completely ignored, otherwise there may be inconsistencies between the model and experiment conditions, as well as distortion of thermal histories related to phase transformation. With experiments of laser melting tracks near edges of substrates, we demonstrate that the model accounting for convective heat transfer can consistently reproduce melt pool traces affected by a substrate's edge. We have proven the existence of scattering waves by the presence of a melt pool through simulation, for a possibility of monitoring the state of laser-induced melt pool in real-time with ultrasound. We have designed deflection experiments of metallic substrates monitored by a high-speed camera, which would benefit calibrating thermo-mechanical models for residual stresses because of the substrate's simple thermal and mechanical history. By reproducing the deflection experiments with the model based on heat conduction and elasto-viscoplasticity, we conclude that the solid state phase transformation plays an indispensable role in the evolution of residual stresses of 17-4PH SS. We also highlight the necessity of monitoring time evolution instead of the end state when evaluating models for residual stress of alloys with volume change during phase transformation.
Book Synopsis The Laser Manufacturing Process by : Anooshiravan Farshidianfar
Download or read book The Laser Manufacturing Process written by Anooshiravan Farshidianfar and published by CRC Press. This book was released on 2024-08-21 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Laser Manufacturing Process is a comprehensive guide to industrial laser processes, offering insights into their fundamentals, applications across industries, production specifics, and characteristics, including mechanical, metallurgical, and geometrical aspects, as well as potential defects. The book also investigates how industrial laser processes are developed and the diverse attributes of the resulting objects, emphasizing their significance in industrial settings. Here, “objects” refer to the tangible outcomes of laser manufacturing, encompassing a wide array of products and components created through processes like cutting, welding, and additive manufacturing. These objects exhibit distinct mechanical properties, metallurgical characteristics, and geometrical precision, all of which are crucial considerations in their utility and performance within industrial environments. This book functions as a concise reference manual catering to the needs of both students and professionals who require knowledge related to laser manufacturing processes, such as laser cutting, laser welding, and laser additive manufacturing processes.
Book Synopsis Thermal-mechanical Modeling of Laser Ablation Hybrid Machining by : Kaiser Matin
Download or read book Thermal-mechanical Modeling of Laser Ablation Hybrid Machining written by Kaiser Matin and published by . This book was released on 2001 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Numerical Thermo-mechanical Model for the Welding and Subsequent Loading of a Fabricated Structure by : Hugh David Hibbitt
Download or read book A Numerical Thermo-mechanical Model for the Welding and Subsequent Loading of a Fabricated Structure written by Hugh David Hibbitt and published by . This book was released on 1972 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Welding Techniques by : Himanshu Vashishtha
Download or read book Advanced Welding Techniques written by Himanshu Vashishtha and published by CRC Press. This book was released on 2024-09-11 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: To meet weight, quality, and cost targets, it is essential to design, develop, and manufacture optimal, cost- effective welded structures that take into consideration material, process, and dimensioning procedures. For effective design, a weld designer must have a comprehensive grasp of welding basics, associated metallurgy, and fabrication and characterization processes. Advanced Welding Techniques highlights breakthroughs in advances in welding methods and provides readers with the ability to accurately identify the appropriate welding processes and optimal improvement methods for intended applications. It offers comprehensive guidance on welding design to ensure readers are equipped to provide solutions to any technical malfunctions they may encounter, including: Supplies essential stepwise knowledge on design for welding, starting with the fundamentals to the complex Covers role of filler metals and parameters on welding performance, emerging and advanced welding techniques, and advantages and limitations of various methods Discusses integration of additive manufacturing and welding Contains practical applications Considers challenges and future scope for further research as well as future challenges This book offers students, academics, researchers, scientists, engineers, and industry experts a comprehensive overview of the most recent breakthroughs in advanced welding methods and their applications to joining various metals and their alloys.
Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Theory of Laser Materials Processing by : John Dowden
Download or read book The Theory of Laser Materials Processing written by John Dowden and published by Springer. This book was released on 2017-06-16 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The revised edition of this important reference volume presents an expanded overview of the analytical and numerical approaches employed when exploring and developing modern laser materials processing techniques. The book shows how general principles can be used to obtain insight into laser processes, whether derived from fundamental physical theory or from direct observation of experimental results. The book gives readers an understanding of the strengths and limitations of simple numerical and analytical models that can then be used as the starting-point for more elaborate models of specific practical, theoretical or commercial value. Following an introduction to the mathematical formulation of some relevant classes of physical ideas, the core of the book consists of chapters addressing key applications in detail: cutting, keyhole welding, drilling, arc and hybrid laser-arc welding, hardening, cladding and forming. The second edition includes a new a chapter on glass cutting with lasers, as employed in the display industry. A further addition is a chapter on meta-modelling, whose purpose is to construct fast, simple and reliable models based on appropriate sources of information. It then makes it easy to explore data visually and is a convenient interactive tool for scientists to improve the quality of their models and for developers when designing their processes. As in the first edition, the book ends with an updated introduction to comprehensive numerical simulation. Although the book focuses on laser interactions with materials, many of the principles and methods explored can be applied to thermal modelling in a variety of different fields and at different power levels. It is aimed principally however at academic and industrial researchers and developers in the field of laser technology.
Book Synopsis Welding Metallurgy and Weldability by : John C. Lippold
Download or read book Welding Metallurgy and Weldability written by John C. Lippold and published by John Wiley & Sons. This book was released on 2014-11-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the weldability aspects of structural materials used in a wide variety of engineering structures, including steels, stainless steels, Ni-base alloys, and Al-base alloys Welding Metallurgy and Weldability describes weld failure mechanisms associated with either fabrication or service, and failure mechanisms related to microstructure of the weldment. Weldability issues are divided into fabrication and service related failures; early chapters address hot cracking, warm (solid-state) cracking, and cold cracking that occur during initial fabrication, or repair. Guidance on failure analysis is also provided, along with examples of SEM fractography that will aid in determining failure mechanisms. Welding Metallurgy and Weldability examines a number of weldability testing techniques that can be used to quantify susceptibility to various forms of weld cracking. Describes the mechanisms of weldability along with methods to improve weldability Includes an introduction to weldability testing and techniques, including strain-to-fracture and Varestraint tests Chapters are illustrated with practical examples based on 30 plus years of experience in the field Illustrating the weldability aspects of structural materials used in a wide variety of engineering structures, Welding Metallurgy and Weldability provides engineers and students with the information needed to understand the basic concepts of welding metallurgy and to interpret the failures in welded components.
Book Synopsis Computational Welding Mechanics by : John A. Goldak
Download or read book Computational Welding Mechanics written by John A. Goldak and published by Springer Science & Business Media. This book was released on 2006-07-04 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Welding Mechanics (CWM) provides readers with a complete introduction to the principles and applications of computational welding including coverage of the methods engineers and designers are using in computational welding mechanics to predict distortion and residual stress in welded structures, thereby creating safer, more reliable and lower cost structures. Drawing upon years of practical experience and the study of computational welding mechanics the authors instruct the reader how to: - understand and interpret computer simulation and virtual welding techniques including an in depth analysis of heat flow during welding, microstructure evolution and distortion analysis and fracture of welded structures, - relate CWM to the processes of design, build, inspect, regulate, operate and maintain welded structures, - apply computational welding mechanics to industries such as ship building, natural gas and automobile manufacturing. Ideally suited for practicing engineers and engineering students, Computational Welding Mechanics is a must-have book for understanding welded structures and recent technological advances in welding, and it provides a unified summary of recent research results contributed by other researchers.
Download or read book Welding Research Abroad written by and published by . This book was released on 2004 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Materials and Processing Technology II by : Dmitry Chinakhov
Download or read book Materials and Processing Technology II written by Dmitry Chinakhov and published by Trans Tech Publications Ltd. This book was released on 2018-07-10 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensive development of engineering contributes to the emergence of new materials and technologies for their processing. This special issue contains research papers on modern technologies for obtaining and processing materials, additive technologies and technologies of welded joints, computer technologies for engineering tasks in materials science. The book is intended for a wide range of specialists engaged in the development and production of heavy-duty metal structures, as well as students, undergraduates, graduate and postgraduate students of technical colleges and universities.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Welding Deformation and Residual Stress Prevention by : Ninshu Ma
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.
Book Synopsis Laser Welding by : João Pedro Oliveira
Download or read book Laser Welding written by João Pedro Oliveira and published by MDPI. This book was released on 2020-05-13 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser welding is a high-energy process used in a wide range of advanced materials to obtain micro- to macro-sized joints in both similar and dissimilar combinations. Moreover, this technique is widely used in several industries, such as automotive, aerospace, and medical industries, as well as in electrical devices. Although laser welding has been used for several decades, significant and exciting innovations often arise from both the process and/or advanced materials side.
