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A Novel Approach For Assessing The Fatigue Strength Of Ultrasonic Impact Treated Welded Structures
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Book Synopsis A novel approach for assessing the fatigue strength of ultrasonic impact treated welded structures by : Veli-Matti Lihavainen
Download or read book A novel approach for assessing the fatigue strength of ultrasonic impact treated welded structures written by Veli-Matti Lihavainen and published by . This book was released on 2006 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fracture Mechanics Fatigue Life Assessment of Welded Joints Under Ultrasonic Impact Treatment by : Mehrdad Sarafrazi
Download or read book Fracture Mechanics Fatigue Life Assessment of Welded Joints Under Ultrasonic Impact Treatment written by Mehrdad Sarafrazi and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding joints are the most used joining method to fabricate engineering structures due to their low cost, structural strength, and geometric flexibility. Irregular geometries, micro cracks, defects, high stress concentration and tensile residual stresses are some of the results of a highly metallurgical process considered as welding. Thus, an important subject of growing concern in product design is to consider some of the critical factors caused from the weld process including high tensile residual stresses and stress concentrations to properly evaluate the fatigue life of the structures. Lightweight design of welded steel and aluminum structures in cyclic service requires the use of post-treatment approaches like Ultrasonic Impact Treatment (UIT). In this thesis, an evaluation of fatigue tests carried out recently on welded specimens exposed to UIT under the effect of the constant amplitude (CA) loading on the fatigue strength is described. First, the effects of the various fatigue damage parameters on the as-welded (AW) condition and the impact treated welds are described in the literature review. Furthermore, fatigue test data have been taken from literature for both conditions under CA loading for several different stress ranges for each material. Following the tests, residual stress distributions below the weld toe surface have been specified by x-ray diffraction of untested specimens. More importantly, the test data obtained from the literature were analyzed through out the thesis and were used to define input parameter values for fracture mechanics analyses of the welded joint specimens. After that, the crack growth assessment of welded structures is provided. For comparison purposes, both Walker and Forman fatigue crack growth models are thoroughly reviewed and their advantages as invaluable tools for predicting the effects of UIT on fatigue performance for welded joints are examined. Subsequently, the benefit of the models in predicting fatigue crack growth behaviors for nine distinct materials are examined and the effects of the various material strength parameters on the impact treatment performance are assessed. Then, fatigue crack propagation life of the materials is displayed. In the end, the crack shape evolution of the materials is depicted. In conclusion, the outcomes of this investigation accompanied by proposed future work are mentioned.
Book Synopsis Proceedings of Crack Paths (CP 2009), Vicenza, Italy 2009 by :
Download or read book Proceedings of Crack Paths (CP 2009), Vicenza, Italy 2009 written by and published by Gruppo Italiano Frattura. This book was released on with total page 1129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis IIW Recommendations for the Fatigue Assessment of Welded Structures By Notch Stress Analysis by : W Fricke
Download or read book IIW Recommendations for the Fatigue Assessment of Welded Structures By Notch Stress Analysis written by W Fricke and published by Woodhead Publishing. This book was released on 2012-10-22 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The notch stress approach for fatigue assessment of welded joints is based on the highest elastic stress at the weld toe or root. In order to avoid arbitrary or infinite stress results, a rounded shape with a reference radius instead of the actual sharp toe or root is usually assumed. IIW recommendations for the fatigue assessment of welded structures by notch stress analysis reviews different proposals for reference radii together with associated S-N curves. Detailed recommendations are given for the numerical analysis of notch stress by the finite or boundary element method. Several aspects are discussed, such as the structural weakening by keyhole-shaped notches and the consideration of multiaxial stress states. Appropriate S-N curves are presented for the assessment of the fatigue strength of different materials. Finally, four examples illustrate the application of the approach as well as the variety of structures which can be analysed and the range of results that can be obtained from different models. Provides detailed recommendations for the number analysis of notch stress by the finite or boundary element method Discusses structural weakening by keyhole-shaped notches and the consideration of multiaxial stress states Provides four comprehensive examples, illustrating the variety of structures which can be analysed and the range of results that can be obtained from different models
Book Synopsis Fatigue Assessment of Welded Joints by Local Approaches by : Dieter Radaj
Download or read book Fatigue Assessment of Welded Joints by Local Approaches written by Dieter Radaj and published by Woodhead Publishing. This book was released on 2006-10-30 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Local approaches to fatigue assessment are used to predict the structural durability of welded joints, to optimise their design and to evaluate unforeseen joint failures. This standard work provides a systematic survey of the principles and practical applications of the various methods. It covers the hot spot structural stress approach to fatigue in general, the notch stress and notch strain approach to crack initiation and the fracture mechanics approach to crack propagation. Seam-welded and spot-welded joints in structural steels and aluminium alloys are also considered.This completely reworked second edition takes into account the tremendous progress in understanding and applying local approaches which has been achieved in the last decade. It is a standard reference for designers, structural analysts and testing engineers who are responsible for the fatigue-resistant in-service behaviour of welded structures.
Book Synopsis Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components by : Erkki Niemi
Download or read book Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components written by Erkki Niemi and published by Springer. This book was released on 2017-08-28 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides background and guidance on the use of the structural hot-spot stress approach to fatigue analysis. The book also offers Design S-N curves for use with the structural hot-spot stress for a range of weld details, and presents parametric formulas for calculating stress increases due to misalignment and structural discontinuities. Highlighting the extension to structures fabricated from plates and non-tubular sections. The structural hot-spot stress approach focuses on cases of potential fatigue cracking from the weld toe and it has been in use for many years in tubular joints. Following an explanation of the structural hot-spot stress, its definition and its relevance to fatigue, the book describes methods for its determination. It considers stress determination from both finite element analysis and strain gauge measurements, and emphasizes the use of finite element stress analysis, providing guidance on the choice of element type and size for use with either solid or shell elements. Lastly, it illustrates the use of the recommendations in four case studies involving the fatigue assessment of welded structures using the structural hot-spot stress
Book Synopsis Fatigue and Fracture of Weldments by : Uwe Zerbst
Download or read book Fatigue and Fracture of Weldments written by Uwe Zerbst and published by Springer. This book was released on 2018-12-11 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and thorough guide to those readers who are lost in the often-confusing context of weld fatigue. It presents straightforward information on the fracture mechanics and material background of weld fatigue, starting with fatigue crack initiation and short cracks, before moving on to long cracks, crack closure, crack growth and threshold, residual stress, stress concentration, the stress intensity factor, J-integral, multiple cracks, weld geometries and defects, microstructural parameters including HAZ, and cyclic stress-strain behavior. The book treats all of these essential and mutually interacting parameters using a unique form of analysis.
Book Synopsis Fatigue Assessment of Welded Joints by Local Approaches by : D. Radaj
Download or read book Fatigue Assessment of Welded Joints by Local Approaches written by D. Radaj and published by William Andrew Pub. This book was released on 1999-06-01 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews the knowledge on approaches to fatigue assessment of welded joints, gathers the data necessary for their practical application and demonstrates the power of the local concept by way of demonstration examples from research and industry. This book also considers seam-welded and spot-welded joints in structural steels and aluminium alloys.
Book Synopsis Fatigue Testing of Weldments by : D. W. Hoeppner
Download or read book Fatigue Testing of Weldments written by D. W. Hoeppner and published by ASTM International. This book was released on 1978 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Analytical Evaluation of Enhancement in Fatigue Resistance of Welded Details Subjected to Post-weld Ultrasonic Impact Treatment by : Sougata Roy
Download or read book Experimental and Analytical Evaluation of Enhancement in Fatigue Resistance of Welded Details Subjected to Post-weld Ultrasonic Impact Treatment written by Sougata Roy and published by . This book was released on 2005 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geometric effect of UIT was analytically evaluated based on notch stress approach. Endurance limit modified by fatigue notch factor and mean load effects provided an excellent estimate of fatigue limit. Spatial residual stress distribution due to welding and subsequent treatment was simulated by finite element analysis.
Book Synopsis Application of the Local Approach to the Fatigue Strength Assessment of Welded Structures in Ships by : H. Petershagen
Download or read book Application of the Local Approach to the Fatigue Strength Assessment of Welded Structures in Ships written by H. Petershagen and published by . This book was released on 1991 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Efficiency of Ultrasonic Impact Treatment for Improving the Fatigue Strength of Welded Joints by : V. I. Trufiakov
Download or read book The Efficiency of Ultrasonic Impact Treatment for Improving the Fatigue Strength of Welded Joints written by V. I. Trufiakov and published by . This book was released on 1998 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis IIW Recommendations On Methods for Improving the Fatigue Strength of Welded Joints by : P J Haagensen
Download or read book IIW Recommendations On Methods for Improving the Fatigue Strength of Welded Joints written by P J Haagensen and published by Woodhead Publishing. This book was released on 2013-01-25 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The weld toe is a primary source of fatigue cracking because of the severity of the stress concentration it produces. Weld toe improvement can increase the fatigue strength of new structures significantly. It can also be used to repair or upgrade existing structures. However, in practice there have been wide variations in the actual improvements in fatigue strength achieved. Based on an extensive testing programme organised by the IIW, this report reviews the main methods for weld toe improvement to increase fatigue strength: burr grinding, TIG dressing and hammer and needle peening. The report provides specifications for the practical use of each method, including equipment, weld preparation and operation. It also offers guidance on inspection, quality control and training as well as assessments of fatigue strength and thickness effects possible with each technique. IIW recommendations on methods for improving the fatigue strength of welded joints will allow a more consistent use of these methods and more predictable increases in fatigue strength. Provides specifications for the practical use of each weld toe method, including equipment, weld preparation and operation Offers guidance on inspection, quality control and training, as well as assessments of fatigue strength and thickness effects possible with each technique This report will allow a more consistent use of these methods and more predictable increases in fatigue strength
Book Synopsis The Fatigue Strength of Welded Joints Improved by Ultrasonic Impact Treatment by : Veli-Matti Lihavainen
Download or read book The Fatigue Strength of Welded Joints Improved by Ultrasonic Impact Treatment written by Veli-Matti Lihavainen and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Strength of Welded Structures by : Stephen John Maddox
Download or read book Fatigue Strength of Welded Structures written by Stephen John Maddox and published by . This book was released on 2002 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recommendations for Fatigue Design of Welded Joints and Components by : A. F. Hobbacher
Download or read book Recommendations for Fatigue Design of Welded Joints and Components written by A. F. Hobbacher and published by Springer. This book was released on 2024-07-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an enriched exploration of structural fatigue assessment. Now in its updated form, this comprehensive edition delves into foundational principles while introducing extensive revisions and fresh content. Notable enhancements include a refined discussion on stress determination, an expanded section on fatigue resistance, also for welded thin sheets, and a thorough update of crucial chapters such as fatigue assessment using S-N curves at constant and variable amplitudes as well as practical application of fracture mechanics on fatigue of welded joints. The addition of new chapters on high-frequency mechanical impact (HFMI) treatment, insightful statistical considerations based on IIW recommendations, and practical application examples further distinguish this edition. With updated references and meticulous attention to detail, this new edition emerges as an indispensable resource, offering professionals and enthusiasts a deeper understanding of fatigue assessment in structural engineering. Prepared as the result of an initiative by Commissions XIII and XV of the International Institute of Welding (IIW), this book represents a significant contribution to the field.
Book Synopsis Design and Analysis of Fatigue Resistant Welded Structures by :
Download or read book Design and Analysis of Fatigue Resistant Welded Structures written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
