Life prediction of thermally cracked railway wheels: Growth estimation of cracks with arbitrary shape |
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| Authors: | A. Martí n Meizoso,J. Gil Sevillano, |
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| Affiliation: | 1. Centro de Estudios e Investigaciones Técnicas de Guipúzcoa (CEIT), Apdo. 1555, 20080 San Sebastián, Spain;2. Escuela Superior de Ingenieros Industriales, Universidad de Navarra, 2006 San Sebastián, Spain;1. Department of Health Sciences, Psychology Unit, University of Florence, via di San Salvi 12, 50100 Florence, Italy;2. Department of Psychology, York University, Toronto, Ontario, Canada;3. Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada;1. Dipartimento di Meccanica, Politecnico di Milano, Via La Masa 1, Milano, 20156, Italy;2. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China;1. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China;2. MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, 610031, China;3. Centre for Railway Engineering, Central Queensland University, Rockhampton, QLD, Australia;1. Central Queensland University, Centre for Railway Engineering, Rockhampton, QLD 4701, Australia;2. Central Queensland University, Power and Energy Centre, Rockhampton, QLD 4701, Australia;3. Downer Rail, North Ryde, NSW 2113, Australia;1. National University of Colombia, Tribology and Surfaces Group, 75th Street 79A-5, Building M17, Medellín, Colombia;2. Delft University of Technology Faculty of Civil Engineering and Geosciences, Railway Engineering, Stevinweg 1, 2628CN Delft, The Netherlands |
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| Abstract: | A computer program for railway wheel life prediction has been developed incorporating an elastoplastic calculation of both the residual stress field induced by shoe-braking and the superposed alternating rolling contact stresses. The possibilities of unstable propagation of surface cracks, crack arrest, fatigue propagation through a complex stress field and crack detention on reaching the threshold value have been accounted for. An approximate method for crack growth prediction is used providing bounds for instantaneous crack front position and estimations of crack shape within short computing times. Some examples of application for an UIC R7 wheel are presented. |
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