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Author : Michael Benson
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (877 download)
Download or read book Weld Residual Stress Finite Element Analysis Validation written by Michael Benson and published by . This book was released on 2014 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Lee Benson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (21 download)
Download or read book Weld Residual Stress Finite Element Analysis Validation written by Michael Lee Benson and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gkatzogiannis, Stefanos
Publisher : KIT Scientific Publishing
ISBN 13 : 3731510669
Total Pages : 316 pages
Book Rating : 4.7/5 (315 download)
Download or read book Finite Element Simulation of Residual Stresses from Welding and High Frequency Hammer Peening written by Gkatzogiannis, Stefanos and published by KIT Scientific Publishing. This book was released on 2022-06-30 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : 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.
Author : Minh Ngoc Tran
Publisher :
ISBN 13 : 9780355151978
Total Pages : pages
Book Rating : 4.1/5 (519 download)
Download or read book Computational Analysis and Validation of Residual Stresses in a Dissimilar Metal Butt Weld written by Minh Ngoc Tran and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: External loads are often well understood and taken into account in the design of mechanical or structural components; however, there are other factors that can significantly affect the performance of materials, such as pre-existing defects and residual stresses. Those factors are usually difficult to detect and quantify, and thus they can be easily overlooked and ignored in the design phase. This work focuses on the residual stresses due to welding and was developed in the context of research with the nuclear power industry. We begin with an introduction of a weld process model, based on nonlinear finite element computation, to predict residual stresses due to the manufacturing process of a pressurizer surge nozzle, a component used in the cooling system of pressurized water reactors. In addition to weld residual stress produced in the course of manufacturing, plant components are subject to internal water pressure and elevated temperature during operation. Therefore, we next investigate the changes in weld residual stress state in the presence of internal pressure and temperature at operating conditions. In the end, the purpose of computing residual stress is often to determine its effect on component operability. For that reason, we also conduct fracture mechanics assessment to forecast the growth of cracks driven by the total stress at operating condition. It is important to obtain accurate weld residual stress information in order to develop an optimal strategy for plant management. However, there is no established, consensus approach for weld residual stress model validation, which could be used to judge weld model quality. This work provides technical detail of example approaches for weld residual stress model validation, and applies these approaches to a set of weld residual stress model outputs that were developed in the context of an industry round robin. The validation metrics for comparisons range from simple (e.g., evaluation of mechanical section forces) to complex (e.g., assessment of predicted crack growth behavior). Applying a range of validation approaches provides information for use within the technical community and to support development of a consensus approach for weld residual stress model validation.
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (684 download)
Download or read book Finite Element Modeling and Validation of Residual Stresses in 304 L Girth Welds written by and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three dimensional finite element simulations of thermal and mechanical response of a 304 L stainless steel pipe subjected to a circumferential autogenous gas tungsten arc weld were used to predict residual stresses in the pipe. Energy is input into the thermal model using a volumetric heat source. Temperature histories from the thermal analysis are used as loads in the mechanical analyses. In the mechanical analyses, a state variable constitutive model was used to describe the material behavior. The model accounts for strain rate, temperature, and load path histories. The predicted stresses are compared with x-ray diffraction determinations of residual stress in the hoop and circumferential directions on the outside surface of the pipe. Calculated stress profiles fell within the measured data. Reasons for observed scatter in measured stresses are discussed.
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (684 download)
Download or read book Finite Element Modeling and Validation of Residual Stresses in 304L Girth Welds written by and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three dimensional finite element simulations of thermal and mechanical response of a 304L stainless steel pipe subjected to a circumferential autogenous gas tungsten arc weld were used to predict residual stresses in the pipe. Energy is input into the thermal model using a volumetric heat source. Temperature histories from the thermal analysis are used as loads in the mechanical analyses. In the mechanical analyses, a state variable constitutive model was used to describe the material behavior. The model accounts for strain rate, temperature, and load path histories. The predicted stresses are compared with X-ray diffraction determinations of residual stress in the hoop and axial directions on the outside surface of the pipe. Calculated stress profiles fell within the measured data. Reasons for the observed scatter in the measured stresses are discussed.
Author : G. Ravichandran
Publisher : CRC Press
ISBN 13 : 9780367535766
Total Pages : 226 pages
Book Rating : 4.5/5 (357 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 2022-02-03 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at transient analysis of welding thermal cycles using ANSYS explaining basic size of the element, welding speed, distance moved by the arc, and methods of simplification of the complex 3D analysis. Case studies for different welding processes, heat input, arc shape, size of the element, and speed of welding are also provided.
Author : Dominic R. Solis
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (913 download)
Download or read book COMSOL Finite-element Analysis written by Dominic R. Solis and published by . This book was released on 2014 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate storage destination for spent nuclear fuel in the United States is currently undecided. Spent fuel will be stored indefinitely in dry cask storage systems typically located on-site at the reactor or at a dedicated independent spent fuel storage installation (ISFSI). Since these canisters were not originally designed or qualified for indefinite storage, there is a need to quantify the length of time they will be viable for storing spent fuel. Stress corrosion cracking (SCC) is a concern in these canisters if they are exposed to an aqueous, chloride-containing film. Canisters are fabricated using a concrete overpacking, along with austenitic stainless steel on the inside which is welded together. One factor that would significantly impact SCC behavior inside these canister welds, if the proper conditions developed such that SCC occurred, is the tensile residual stress profile. As the highest residual stresses are present in the welds and their heat-affected zones (HAZ), it would be useful to investigate their influence by predicting the residual stress profile in the container. These data will support further research into the life expectancy of these canisters and the possible ways in which they might fail due to SCC. Residual stress data for nuclear waste canisters are scarce. Without experimental measurements, initial insight must be attained through computational analysis using finite-element analysis (FEA) packages such as COMSOL. Using a representative 304L/308L weld plate as a model in COMSOL, predicted residual stress shows some agreement with expected trends: high tensile stresses in the weld/ HAZ regions and compressive stresses in the surrounding material. Hardness tests show trends similar to the hardening profiles that were created after the weld simulation. Additionally, the thermal model may offer insight in predicting the HAZ profiles in the weld. While the 2D model is simplified and would benefit from further refinement and validation, preliminary results suggest that FEA could be used for residual stress measurement predictions.
Author : H-Y Lee
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (125 download)
Download or read book Residual Stress Distributions for Plate T-Butt Welds in Defect Assessment Applications written by H-Y Lee and published by . This book was released on 2007 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The residual stress distributions for plate T-butt welds were determined from a detailed finite element analysis of the welding process and they were compared with those of the measured data for validation. The residual stress distributions from the analyses and measurements were shown to be in similar shape. The distributions were found to be below the master curve for the residual stresses that were previously determined from a statistical analysis for a range of weld geometries and materials. A failure assessment for the T-butt weld with cracks under residual stress distributions has been carried out. The conservatism in the current life assessment procedures regarding the residual stresses were quantified based on the stress intensity factor (SIF) calculations for the T-butt weld. It was shown that the master curve profile provides more realistic values for the SIFs with reasonable conservatism than the profiles recommended in the existing assessment procedures.
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 : A. Yaghi
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.E/5 ( download)
Download or read book State of the Art Review written by A. Yaghi and published by . This book was released on 2005 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nilesh Kulkarni
Publisher : Butterworth-Heinemann
ISBN 13 : 012800732X
Total Pages : 59 pages
Book Rating : 4.1/5 (28 download)
Download or read book Residual Stresses in Friction Stir Welding written by Nilesh Kulkarni and published by Butterworth-Heinemann. This book was released on 2013-11-20 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fundamentals of residual stresses in friction stir welding and reviews the data reported for various materials. Residual stresses produced during manufacturing processes lead to distortion of structures. It is critical to understand and mitigate residual stresses. From the onset of friction stir welding, claims have been made about the lower magnitude of residual stresses. The lower residual stresses are partly due to lower peak temperature and shorter time at temperature during friction stir welding. A review of residual stresses that result from the friction stir process and strategies to mitigate it have been presented. Friction stir welding can be combined with additional in-situ and ex-situ manufacturing steps to lower the final residual stresses. Modeling of residual stresses highlights the relationship between clamping constraint and development of distortion. For many applications, management of residual stresses can be critical for qualification of component/structure. - Reviews magnitude of residual stresses in various metals and alloys - Discusses mitigation strategies for residual stresses during friction stir welding - Covers fundamental origin of residual stresses and distortion
Author : H. Nakamura
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (125 download)
Download or read book Computer Aided Nondestructive Evaluation Method of Welding Residual Stresses by Removing Reinforcement of Weld (Proposal of a New Concept and Its Verification) written by H. Nakamura and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new method (the bead flush method) is proposed to estimate welding residual stresses non-destructively. First, the reinforcement of the weld is removed. Then from released strains on the surface due to removal, eigenstrain distributions are estimated by an inverse analysis. Finally, residual stresses are determined by the finite element method (FEM) using estimated eigenstrains as boundary conditions.
Author : Caterina Casavola
Publisher : BoD – Books on Demand
ISBN 13 : 1789849519
Total Pages : 158 pages
Book Rating : 4.7/5 (898 download)
Download or read book New Challenges in Residual Stress Measurements and Evaluation written by Caterina Casavola and published by BoD – Books on Demand. This book was released on 2020-07-22 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses (RS) are stresses present inside materials even in the absence of any applied load. They are of capital importance because they can impact greatly on the mechanical strength of the material, on its dimensional correspondence to design specifications as well as on the fatigue life of the part. RS measurement and evaluation is currently an important research topic where a lot of challenges still need to be addressed. This book aims to provide the reader with an overview of the principal novelties in this field including current limitations and potential future developments. Both radically new experimental approaches as well as recent evolutions of consolidated ones will be presented, along with the latest novelties in the area of numerical residual stress evaluation.
Author : Lennart Karlsson
Publisher : ASM International(OH)
ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.3/5 (91 download)
Download or read book Modeling in Welding, Hot Powder Forming, and Casting written by Lennart Karlsson and published by ASM International(OH). This book was released on 1997 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work provides thorough coverage of the theoretical foundations of thermomechanical modeling of welding, hot powder forming, and casting processes, which also can be applied to modeling of the heat treatment and forging of solids. Information on finite element modeling methods will assist design engineers in taking manufacturing processes into consideration to minimize residual stresses and deformation in the design of mechanical components. Contents include: Thermomechanical modeling Thermal modeling of welds Mechanical modeling of welding and residual stresses in welds Metallurgical and mechanical consequences of phase transformations in numerical simulations of welding processes Predicting and measuring methods of two- and three-dimensional residual stresses by using inherent strain as a parameter Hot isostatic pressing Hot powder forging Modeling of heat transfer, fluid flow, and thermodynamics in casting Stresses in castings Thermomechanical modeling in casting with experimental validation.
Author :
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.3/5 (555 download)
Download or read book Finite Element Modeling of Residual Stresses in Electroslag Butt Welds written by and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
