High cycle fatigue of welded joints: The TCD experience |
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| Authors: | David Taylor David Hoey |
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| Affiliation: | 1. Department of Engineering University of Ferrara, Italy;2. Department of Aeronautics Imperial College, London;3. Department of Engineering University of Ferrara, Italy;4. Department of Engineering University of Ferrara, Italy;1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Key Laboratory of Aero-engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;3. Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China;4. INEGI, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal;5. Department of Civil Engineering, University of Zabol, P.B. 9861335856, Zabol, Iran;1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China;1. Montanuniversität Leoben, Chair of Mechanical Engineering, Leoben, Austria;2. Technische Universität Darmstadt, Materials Mechanics Group, Darmstadt, Germany;3. Aalto University, Department of Mechanical Engineering, Espoo, Finland;1. State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi’an University of Technology, No.5 Jinhua Road, Xi’an 710048, PR China;2. School of Civil Engineering and Architecture, Xi’an University of Technology, No.5 Jinhua Road, Xi’an 710048, PR China;3. Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, No.5 Jinhua Road, Xi’an 710048, PR China;4. Department of Civil Engineering, Xi′an University of Architecture and Technology, No.13 Yanta Road, Xi’an 710055, PR China |
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| Abstract: | This paper reports on the use of two methods for the prediction of high cycle fatigue failure in welded joints. The development of these methods – known as the crack modelling method and the theory of critical distances – is described, summarising previously published work on test specimens using steels and aluminium alloys. It is concluded that the methods work well, predicting fatigue strength with errors of less than 20% in the great majority of cases. Certain types of joint were found to give rise to large, conservative errors, but similar errors also occurred when using other, well established, methods of prediction. Some restrictions also arise with the use of the TCD for bodies having very small section thicknesses. Finally, two case studies, described here for the first time, illustrate the issues that arise when making predictions during investigations into the failure of welded joints in real engineering components in service. |
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