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.DUBLIN, Ireland -- Research and Markets (http://www.researchandmarkets.com/reports/c43393) has announced the addition of Fatigue Analysis of Welded Components: Designer's Guide to the Hot-Spot Stress Approach to their offering. This new report: -- Provides practical guidance on the application of the structural hot-spot stress approach -- Discusses stress determination from both finite element analysis Finite element analysis (FEA) is a computer simulation technique used in engineering analysis. It uses a numerical technique called the finite element method (FEM). There are many finite element software packages, both free and proprietary. and strain gauge strain gauge Device for measuring the changes in distances between points in solid bodies that occur when the body is deformed. Strain gauges are used either to obtain information from which stresses in bodies can be calculated or to act as indicating elements on devices for measurements -- Practical application of the recommendations is illustrated in two case studies 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 IIW Insurance Information Warehouse IIW International Institute of Welding IIW It Is Written (TV/Internet religious ministry) IIW Institut für Internationale Wirtschaftspolitik 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 mis·a·ligned adj. Incorrectly aligned. mis  a·lign ment n. and structural discontinuities are also presented. Special attention is paid to the use of finite element See FEA. 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 S-N Signal-to-Noise ratio (also seen as S/N or S/NR or SNR)S-N Stress vs. Number of Cycles to Failure Curve 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. About the authors: Professor Erkki Niemi is Emeritus Professor of Steel Structures in Lappeenranta University of Technology The Lappeenranta University of Technology (LUT) (in Finnish: Lappeenrannan teknillinen yliopisto, LTY) was established in 1969. The university campus is situated on the shore of lake Saimaa, about 7 kilometres away from the city center. , Finland. Dr-Ing. Wolfgang Fricke is Professor of Ship Structural Design and Analysis at Hamburg University of Technology, Germany. Dr Stephen Maddox, Chair of the IIW's Commission XIII, works at the internationally-renowned TWI Twi n. A variety of the Akan language spoken in Ghana. in Cambridge, UK. Content Outline: Introduction General Safety aspects. The structural hot-spot approach to fatigue analysis Field of application. Types of hot spot. Definition of the structural stress at a type "a" hot spot. Use of stress concentration factors. Effect of component size on the fatigue resistance. Experimental determination of the structural hot-spot stress General. Type "a" hot spots hot spots acute moist dermatitis. . Type "b" hot spots Structural stress determination using finite element analysis General. Choice of element type. Methods for determination of structural hot spot stress. Use of relatively coarse element meshing for analysing Type "a" hot spots. Use of relatively fine element meshing for analysing Type "a" hot spots. Modelling of fillet fillet /fil·let/ (fil´et) 1. a loop, as of cord or tape, for making traction on the fetus. 2. in the nervous system, a long band of nerve fibers. fil·let n. 1. welds in shell element models for analysing Type "a" hot spots. Analysis of Type "b" hot spots. Content Outline: Parametric formulae Misalignments. Structural Discontinuities. Structural hot-spot S-N curves General principles. Recommended S-N curves. Case study 1: box beam of a railway wagon Introduction. Materials and methods. Result. Discussion and conclusions. Case study 2: hatch corner design for container ships; References. Introduction. Materials and methods. Fatigue assessment. Conclusion. For more information visit http://www.researchandmarkets.com/reports/c43393 |
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