Numerical study on fatigue crack growth in railway wheels under the influence of residual stresses |
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| Affiliation: | 1. Department of Mechanical Engineering, Graduate School of Engineering, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka 819-0395, Japan;2. Toyota Central R&D Labs., Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan;3. Department of Mechanical Engineering, Faculty of Engineering, Kyushu University, Moto-oka 744, Nishi-ku, Fukuoka 819-0395, Japan;1. Department of Applied Mechanics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden;2. Qamcom Research & Technology AB, Falkenbergsgatan 3, SE-41285 Gothenburg, Sweden;1. SNCF – Innovation and Research, 40 Avenue des Terroirs de France, 75611 Paris Cedex 12, France;2. Université de Lyon, CNRS INSA-Lyon, LaMCoS, UMR5259, 20 Avenue Albert Einstein, F69621 Villeurbanne Cedex, France;3. SNCF Réseau – Maintenance & Travaux, 18 rue de Dunkerque, 75010 Paris, France;1. Illinois Institute of Technology, Dept. Mechanical, Materials and Aerospace Engineering, 10 SW 32nd St, 60616 Chicago, USA;2. Aalto University, Department of Mechanical Engineering, Marine Technology, Puumiehenkuja 5A, 02150 Espoo, Finland;3. University of Padova, Department of Management and Engineering, Stradella San Nicola 3, 36100 Vicenza, Italy;4. NTNU, Department of Engineering Design and Materials, Richard Birkelands vei 2b, 7491 Trondheim, Norway;5. Politecnico di Bari, Dipartimento di Meccanica, Matematica e Management, Viale Japigia 182, 70126 Bari, Italy |
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| Abstract: | Accurate prediction of fatigue crack growth on railway wheels and the influence of residual stresses by finite element method (FEM) modeling can affect the maintenance planning. Therefore, investigation of rolling contact fatigue and its effect on rolling members life seem necessary. The objective of this paper is to provide a prediction of rolling contact fatigue crack growth in the rail wheel under the influence of stress field from mechanical loads and heat treatment process of a railway wheel. A 3D nonlinear stress analysis model has been applied to estimate stress fields of the railway mono-block wheel in heat treatment process. Finite element analysis model is presented applying the elastic–plastic finite element analysis for the rail wheel under variable thermal loads. The stress history is then used to calculate stress intensity factors (SIFs) and fatigue life of railway wheel. The effect of several parameters, vertical loads, initial crack length and friction coefficient between the wheel and rail, on the fatigue life in railway wheels is investigated using the suggested 3-D finite element model. Three-dimensional finite element analysis results obtained show good agreement with those achieved in field measurements. |
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| Keywords: | Crack growth Stress field Finite element Stress intensity factors Fatigue life |
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