Advanced Methods of Fatigue Assessment

Author: Dieter Radaj
Publisher: Springer Science & Business Media
ISBN: 364230740X
Format: PDF, Kindle
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In five chapters, this volume presents recent developments in fatigue assessment. In the first chapter, a generalized Neuber concept of fictitious notch rounding is presented where the microstructural support factors depend on the notch opening angle besides the loading mode. The second chapter specifies the notch stress factor including the strain energy density and J-integral concept while the SED approach is applied to common fillet welded joints and to thin-sheet lap welded joints in the third chapter. The forth chapter analyses elastic-plastic deformations in the near crack tip zone and discusses driving force parameters. The last chapter discusses thermomechanical fatigue, stress, and strain ranges.

Fatigue Assessment of Welded Joints by Local Approaches

Author: Dieter Radaj
Publisher: Woodhead Publishing
ISBN: 9781855734036
Format: PDF, ePub, Docs
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This book reviews the available knowledge on local 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. 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 considered. The book is intended for designers, structural analysts and testing engineers who are responsible for the fatigue-resistant in-service behaviour of welded structures. It should become a reference work for researchers in the field and should support activities directed to standardisation of local approaches.

Fatigue Testing and Analysis

Author: Yung-Li Lee
Publisher: Elsevier
ISBN: 0080477690
Format: PDF, ePub
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Fatigue Testing and Analysis: Theory and Practice presents the latest, proven techniques for fatigue data acquisition, data analysis, and test planning and practice. More specifically, it covers the most comprehensive methods to capture the component load, to characterize the scatter of product fatigue resistance and loading, to perform the fatigue damage assessment of a product, and to develop an accelerated life test plan for reliability target demonstration. This book is most useful for test and design engineers in the ground vehicle industry. Fatigue Testing and Analysis introduces the methods to account for variability of loads and statistical fatigue properties that are useful for further probabilistic fatigue analysis. The text incorporates and demonstrates approaches that account for randomness of loading and materials, and covers the applications and demonstrations of both linear and double-linear damage rules. The reader will benefit from summaries of load transducer designs and data acquisition techniques, applications of both linear and non-linear damage rules and methods, and techniques to determine the statistical fatigue properties for the nominal stress-life and the local strain-life methods. Covers the useful techniques for component load measurement and data acquisition, fatigue properties determination, fatigue analysis, and accelerated life test criteria development, and, most importantly, test plans for reliability demonstrations Written from a practical point of view, based on the authors' industrial and academic experience in automotive engineering design Extensive practical examples are used to illustrate the main concepts in all chapters

Metal Fatigue Analysis Handbook

Author: Yung-Li Lee
Publisher: Elsevier
ISBN: 0123852048
Format: PDF, ePub, Docs
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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

NDT Methods Applied to Fatigue Reliability Assessment of Structures

Author: Jamshid Mohammadi
Publisher: ASCE Publications
ISBN: 9780784407424
Format: PDF, ePub, Mobi
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Sponsored by the Fatigue and Fracture Reliability Committee of the Structural Engineering Institute of ASCE. This report contains nine specific-application cases of various nondestructive test (NDT) methods in fatigue and fracture reliability assessment of structures. The collection is useful in learning about areas where current methods have actually been applied in real world applications. Cases examine problems such as steel girder bridges, airframe systems, welded connections, and bridge components (including concrete slabs), which were subjected to fracture failure. The report includes such NDT methods as: structural monitoring; use of various methods for the identification of the extent of damage; acoustic emissions technique; electromagnetic; portable hardness test; liquid penetrant; magnetic particle; radiography; residual stress by hole drill; and ultrasonic methods. The fatigue reliability assessment methods discussed in this book will be especially useful to practitioners, educators, and students in structural engineering.

IIW Recommendations for the Fatigue Assessment of Welded Structures By Notch Stress Analysis

Author: W Fricke
Publisher: Woodhead Publishing
ISBN: 085709856X
Format: PDF
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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

Fracture and Fatigue of Welded Joints and Structures

Author: K Macdonald
Publisher: Elsevier
ISBN: 0857092502
Format: PDF, ePub, Docs
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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

Condition Assessment of Aged Structures

Author: J K Paik
Publisher: Elsevier
ISBN: 1845695216
Format: PDF
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Any structural system in service is subject to age-related deterioration, leading to potential concerns regarding maintenance, health & safety, environmental and economic implications. Condition assessment of aged structures is an invaluable, single source of information on structural assessment techniques for marine and land-based structures such as ships, offshore installations, industrial plant and buildings. Topics covered include: - Current practices and standards for structural condition assessment - Fundamental mechanisms and advanced mathematical methods for predicting structural deterioration - Residual strength assessment of deteriorated structures - Inspection and maintenance of aged structures - Reliability and risk assessment of aged structures Professionals from a broad range of disciplines will be able to gain a better understanding of current practices and standards for structural condition assessment or health monitoring, and what future trends might be. Single source of information on structural assessment techniques for marine and land-based structures Examines the residual strength and reliability of aged structures Assesses current practices covering inspection, health monitoring and maintenance

Analysis and Design of Marine Structures V

Author: C. Guedes Soares
Publisher: CRC Press
ISBN: 1315685051
Format: PDF, ePub, Docs
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Analysis and Design of Marine Structures V contains the papers presented at MARSTRUCT 2015, the 5th International Conference on Marine Structures (Southampton, UK, 25-27 March 2015). The MARSTRUCT series of conferences started in Glasgow, UK in 2007, the second event of the series took place in Lisbon, Portugal (2009), while the third was in Hamburg, Germany (2011), and the fourth in Espoo, Finland (2013). This conference series deals with Ship and Offshore Structures, addressing the following topics: – Methods and Tools for Loads and Load Effects – Methods and Tools for Strength Assessment; Experimental Analysis of Structures – Materials and Fabrication of Structures – Methods and Tools for Structural Design and Optimisation – Structural Reliability, Safety and Environmental Protection This book is essential reading for academics, engineers and all professionals involved in the area of design of marine and offshore structures.

Ships and Offshore Structures XIX

Author: Carlos Guedes Soares
Publisher: CRC Press
ISBN: 1315647192
Format: PDF, Mobi
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This three-volume work presents the proceedings from the 19th International Ship and Offshore Structures Congress held in Cascais, Portugal on 7th to 10th September 2015. The International Ship and Offshore Structures Congress (ISSC) is a forum for the exchange of information by experts undertaking and applying marine structural research. The aim of the ISSC is to facilitate the evaluation and dissemination of results from recent investigations; to make recommendations for standard design procedures and criteria; to discuss research in progress and planned; to identify areas requiring further research, and to encourage international collaboration in furthering theses aims. Structures of interest to the ISSC include ships and other marine structures used for transportation, exploration, and exploitation of resources in and under the oceans.