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Numerical Study Of Fatigue Life On Spot Welded
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Book Synopsis Numerical Study of Fatigue Life on Spot Welded by : Muhammad Aliff Abdul Manan
Download or read book Numerical Study of Fatigue Life on Spot Welded written by Muhammad Aliff Abdul Manan and published by . This book was released on 2008 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis present about the fatigue life of spot welded on different sheet thickness, different spot of diameter and material. A simple u-tensile model was drawn by computer aided design (CAD) software and was analyzed by finite element analysis (FEA) software. In this analysis, a variable amplitude loading has been used to analyze the fatigue life of spot welded. Linear elastic analysis was carried out to predict the stress state along the weld direction. The thickness range from 0.2-1.2 mm, while the spot of diameter from 3-9 mm has been used. Besides that, material model AISI 1015, 1020, 1040 and 1045 was used for optimization. After analyze and optimization, we found that the spot diameter 9 mm is the higher of fatigue life compared to 3 - 7 mm spot diameter while the higher of fatigue life for thickness is 1.2 mm. For different material, the higher of fatigue life is AISI 1045 material, followed by AISI 1040, 1020 and 1015. However the fatigue life decreases linearly with the increases of loads.
Book Synopsis Numerical Study on Fatigue Life of Spot Welded for Automotive Components by :
Download or read book Numerical Study on Fatigue Life of Spot Welded for Automotive Components written by and published by . This book was released on 2008 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Life Analyses of Welded Structures by : Tom Lassen
Download or read book Fatigue Life Analyses of Welded Structures written by Tom Lassen and published by John Wiley & Sons. This book was released on 2013-03-01 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avoiding or controlling fatigue damage is a major issue in the design and inspection of welded structures subjected to dynamic loading. Life predictions are usually used for safe life analysis, i.e. for verifying that it is very unlikely that fatigue damage will occur during the target service life of a structure. Damage tolerance analysis is used for predicting the behavior of a fatigue crack and for planning of in-service scheduled inspections. It should be a high probability that any cracks appearing are detected and repaired before they become critical. In both safe life analysis and the damage tolerance analysis there may be large uncertainties involved that have to be treated in a logical and consistent manner by stochastic modeling. This book focuses on fatigue life predictions and damage tolerance analysis of welded joints and is divided into three parts. The first part outlines the common practice used for safe life and damage tolerance analysis with reference to rules and regulations. The second part emphasises stochastic modeling and decision-making under uncertainty, while the final part is devoted to recent advances within fatigue research on welded joints. Industrial examples that are included are mainly dealing with offshore steel structures. Spreadsheets which accompany the book give the reader the possibility for hands-on experience of fatigue life predictions, crack growth analysis and inspection planning. As such, these different areas will be of use to engineers and researchers.
Book Synopsis Design and Analysis of Fatigue Resistant Welded Structures by : Dieter Radaj
Download or read book Design and Analysis of Fatigue Resistant Welded Structures written by Dieter Radaj and published by Woodhead Publishing. This book was released on 1990-01-03 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: An English version of a sucessful German book. Both traditional and modern concepts are described.
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 1998 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Design and Reliability by : G. Marquis
Download or read book Fatigue Design and Reliability written by G. Marquis and published by Elsevier. This book was released on 1999-02-19 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents a selection of papers presented at the Third International Symposium on Fatigue Design, Fatigue Design 1998, held in Espoo, Finland, 26-29 May, 1998. One objective of this symposium series was to help bridge the gap that sometimes exists between researchers and engineers responsible for designing components against fatigue failure. The 21 selected papers provide an up-to-date survey of engineering practice and a preview of design methods that are advancing toward application. Reliability was selected as a key theme for FD'98. During the design of components and structures, it is not sufficient to combine mean material properties, average usage parameters, and pre-selected safety factors. The engineer must also consider potential scatter in material properties, different end users, manufacturing tolerances and uncertainties in fatigue damage models. Judgement must also be made about the consequences of potential failure and the required degree of reliability for the structure or component during its service life. Approaches to ensuring reliability may vary greatly depending on the structure being designed. Papers in this volume intentionally provide a multidisciplinary perspective on the issue. Authors represent the ground vehicle, heavy equipment, power generation, ship building and other industries. Identical solutions cannot be used in all cases because design methods must always provide a balance between accuracy and simplicity. The point of balance will shift depending on the type of input data available and the component being considered.
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 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 661 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. Completely reworked second edition of a standard work providing a systematic survey of the principles and practical applications of the various methods 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. Written by a distinguished team of authors
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 Analysis of Welded Components by : E. Niemi
Download or read book Fatigue Analysis of Welded Components written by E. Niemi and published by Woodhead Publishing. This book was released on 2006-09-27 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides background and guidance on the use of the structural hot spot stress approach to the fatigue design of welded components and structures. It complements the IIW recommendations for 'Fatigue Design of Welded Joints and Components' and extends the information provided in the IIW recommendations on 'Stress Determination for Fatigue Analysis of Welded Components'. This approach is applicable to cases of potential fatigue cracking from the weld toe. It has been in use for many years in the context of tubular joints. The present report concentrates on its extension to structures fabricated from plates and non-tubular sections.Following an explanation of the structural hot spot stress, its definition and its relevance to fatigue, the authors describe methods for its determination. Stress determination from both finite element analysis and strain gauge measurements is considered. Parametric formulae for calculating stress increases due to misalignment and structural discontinuities are also presented. Special attention is paid to the use of finite element stress analysis and guidance is given on the choice of element type and size for use with either solid or shell elements. Design S-N curves for use with the structural hot spot stress are presented for a range of weld details. Finally, practical application of the recommendations is illustrated in two case studies involving the fatigue assessment of welded structures using the structural hot spot stress approach. Provides practical guidance on the application of the structural hot-spot stress approach Discusses stress determination from both finite element analysis and strain gauge measurements Practical application of the recommendations is illustrated in two case studies
Book Synopsis Numerical Simulation of Fatigue Crack Growth in Load- and Non-load-carrying Fillet Welded Joints by : Mubashar Ahmad
Download or read book Numerical Simulation of Fatigue Crack Growth in Load- and Non-load-carrying Fillet Welded Joints written by Mubashar Ahmad and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is one of the major causes of failure in cyclically loaded structures such as, bridges, locomotive parts, rotating machinery components, etc. Welded structures are common in ship building. These welded structures are subjected to fluctuating loads in offshore environment, which requires proper attention for fatigue failure in the design phase of such structures. Although, lab tests can be conducted for concerned materials under controlled environmental conditions, but it is a cost and time intensive approach, and is not always possible. A number of assessments have been carried out over the years for a number of common structural configurations to standardize the design for fatigue and make it less cost-intensive. However, the amount of established standards is still very small relative to the number of possible design configurations. Hence, there is a constant need for numerical models which aim at estimating the fatigue life without the need for tests to be conducted. Crack Propagation is one of the established numerical approaches used for assessing remaining fatigue life of structures which are already in service. This approach is based on the assumption of an initial crack already existing in the structure, and consequently, the remaining fatigue life is considered to be dominated by crack propagation stage. The same can be considered true for welded structures, where weld imperfections and weld gaps act as micro-cracks and the service life of such structures can be considered to be dominated by crack growth stage. This study aims at evaluating the ability of crack propagation approach to predict the fatigue life of fillet welded joints. For this purpose, a numerical simulation tool called Franc2D is used to calculate the stress intensity factors (SIF) from 2D models. These values along with other factors are used as inputs for Paris and Erdogan Law to predict the fatigue life of load carrying and non-load carrying fillet welds. These results are then compared to the lab test results and the conclusions are drawn.
Book Synopsis Failure Mechanisms of Advanced Welding Processes by : X Sun
Download or read book Failure Mechanisms of Advanced Welding Processes written by X Sun and published by Elsevier. This book was released on 2010-07-15 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many new, or relatively new, welding processes such as friction stir welding, resistance spot welding and laser welding are being increasingly adopted to replace or improve on traditional welding techniques. Before advanced welding techniques are employed, their potential failure mechanisms should be well understood and their suitability for welding particular metals and alloys in different situations should be assessed. Failure mechanisms of advanced welding processes provides a critical analysis of advanced welding techniques and their potential failure mechanisms. The book contains chapters on the following topics: Mechanics modelling of spot welds under general loading conditions and applications to fatigue life predictions, Resistance spot weld failure mode and weld performance for aluminium alloys, dual phase steels and TRIP steels, Fatigue behaviour of spot welded joints in steel sheets, Non-destructive evaluation of spot weld quality, Solid state joining - fundamentals of friction stir welding, Failure mechanisms in friction stir welds, Microstructure characteristics and mechanical properties of laser weld bonding of magnesium alloy to aluminium alloy, Fatigue in laser welds, Weld metal ductility and its influence on formability of tailor welded blanks, Joining of lightweight materials using reactive nanofoils, and Fatigue life prediction and improvements for MIG welded advanced high strength steel weldments. With its distinguished editor and international team of contributors, Failure mechanisms of advanced welding processes is a standard reference text for anyone working in welding and the automotive, shipbuilding, oil and gas and other metal fabrication industries who use modern and advanced welding processes. Provides a critical analysis of advanced welding techniques and their potential failure mechanisms Experts in the field survey a range of welding processes and examine reactions under various types of loading conditions Examines the current state of fatigue life prediction of welded materials and structures in the context of spot welded joints and non-destructive evaluation of quality
Book Synopsis A Study on Fatigue of Welded Structures by : Jun Huang
Download or read book A Study on Fatigue of Welded Structures written by Jun Huang and published by . This book was released on 2002 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue of Welded Structures by : Timothy Russell Gurney
Download or read book Fatigue of Welded Structures written by Timothy Russell Gurney and published by CUP Archive. This book was released on 1979-12-20 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Fatigue Analysis Handbook by : Yung-Li Lee
Download or read book Metal Fatigue Analysis Handbook written by Yung-Li Lee and published by Elsevier. This book was released on 2011-08-17 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understand why fatigue happens and how to model, simulate, design and test for it with this practical, industry-focused reference Written to bridge the technology gap between academia and industry, the Metal Fatigue Analysis Handbook presents state-of-the-art fatigue theories and technologies alongside more commonly used practices, with working examples included to provide an informative, practical, complete toolkit of fatigue analysis. Prepared by an expert team with extensive industrial, research and professorial experience, the book will help you to understand: Critical factors that cause and affect fatigue in the materials and structures relating to your work Load and stress analysis in addition to fatigue damage-the latter being the sole focus of many books on the topic How to design with fatigue in mind to meet durability requirements How to model, simulate and test with different materials in different fatigue scenarios The importance and limitations of different models for cost effective and efficient testing Whilst the book focuses on theories commonly used in the automotive industry, it is also an ideal resource for engineers and analysts in other disciplines such as aerospace engineering, civil engineering, offshore engineering, and industrial engineering. The only book on the market to address state-of-the-art technologies in load, stress and fatigue damage analyses and their application to engineering design for durability Intended to bridge the technology gap between academia and industry - written by an expert team with extensive industrial, research and professorial experience in fatigue analysis and testing An advanced mechanical engineering design handbook focused on the needs of professional engineers within automotive, aerospace and related industrial disciplines
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 2015-12-23 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a basis for the design and analysis of welded components that are subjected to fluctuating forces, to avoid failure by fatigue. It is also a valuable resource for those on boards or commissions who are establishing fatigue design codes. For maximum benefit, readers should already have a working knowledge of the basics of fatigue and fracture mechanics. The purpose of designing a structure taking into consideration the limit state for fatigue damage is to ensure that the performance is satisfactory during the design life and that the survival probability is acceptable. The latter is achieved by the use of appropriate partial safety factors. This document has been prepared as the result of an initiative by Commissions XIII and XV of the International Institute of Welding (IIW).
Book Synopsis Fracture and Fatigue of Welded Joints and Structures by : K Macdonald
Download or read book Fracture and Fatigue of Welded Joints and Structures written by K Macdonald and published by Elsevier. This book was released on 2011-04-19 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: The failure of any welded joint is at best inconvenient and at worst can lead to catastrophic accidents. Fracture and fatigue of welded joints and structures analyses the processes and causes of fracture and fatigue, focusing on how the failure of welded joints and structures can be predicted and minimised in the design process. Part one concentrates on analysing fracture of welded joints and structures, with chapters on constraint-based fracture mechanics for predicting joint failure, fracture assessment methods and the use of fracture mechanics in the fatigue analysis of welded joints. In part two, the emphasis shifts to fatigue, and chapters focus on a variety of aspects of fatigue analysis including assessment of local stresses in welded joints, fatigue design rules for welded structures, k-nodes for offshore structures and modelling residual stresses in predicting the service life of structures. With its distinguished editor and international team of contributors, Fracture and fatigue of welded joints and structures is an essential reference for mechanical, structural and welding engineers, as well as those in the academic sector with a research interest in the field. Analyses the processes and causes of fracture and fatigue, focusing predicting and minimising the failure of welded joints in the design process Assesses the fracture of welded joints and structure featuring constraint-based fracture mechanics for predicting joint failure Explores specific considerations in fatigue analysis including the assessment of local stresses in welded joints and fatigue design rules for welded structures
