Wheel Rail Contact
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Rolling Contact Fatigue Life of Rail for Different Slip Conditions
Abstract A three-dimensional elastic-plastic finite element analysis (FEA) is carried out to estimate the rolling contact fatigue (RCF) crack initiation life for varied slip range on the rail arising from operational variations. The wheel load produces Hertzian contact pressure. Variation in engine traction induces slip variations that evolves thermal load i
Lat. Am. j. solids struct.. Publicado em: 2017-12
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2. Thermal load effects on fatigue life of a cracked railway wheel
AbstractIn this paper, fatigue life of a cracked railway wheel under thermo-mechanical loads is studied. For this purpose a FE model of a wheel, with two brake shoes and a portion of rail is created and suitable loads and boundary conditions are applied to the model. It is assumed that the wheel has contained an elliptical crack in the definite depth of the
Lat. Am. j. solids struct.. Publicado em: 2015-06
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3. An elastoplastic numerical model of rolling contact applied to analyze the fatigue of railroad wheels / Modelo numerico elastoplastico de contato com rolamento aplicado a analise de fadiga de rodas ferroviarias
This work proposes a wheel-rail contact model based on finite element method to estimate the fatigue life to shelling, until the beginning of the crack of a railroad wheel class C of a heavyhull Brazilian railroad from Serra dos Carajás. The main contribution of this work is the elastoplastic approach with the inclusion of the residual stress generated by t
Publicado em: 2008
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4. Análise das forças de contato e comportamento dinâmico de rodeiro ferroviário. / Analysis of creep forces and the dynamic behavior of wheelset.
Sistemas dinâmicos ferroviários são modelados levando-se em consideração as forças de contato roda trilho. As equações de movimento são fortemente influenciadas pela determinação dessas forças, o que requer o conhecimento da mecânica de contato, ferramenta imprescindível na previsão do comportamento de uma composição ferroviária. O rodeiro
Publicado em: 2006
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5. Evaluation of subsurface contact stresses in railroad wheels using an elastic half-space model
Railroad wheels fail in two main modes: rolling surface defects like spalling, shelling and wear, and internal defects including cracks propagating after a change takes place in the original stress pattern. Although the effects of the latter are almost always catastrophic, the former is more usual. The onset of rolling surface defects depends on the strength
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2004-12
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6. Analise do contato roda-trilho e sua influencia na vida em serviço de rodas ferroviarias
The objective of this work is to analyze the stresses in the wheel-rail contact and to compare them with the contact strength for wheel and rail steels, aiming to estimate the service life for wheels. Those stresses are fundamental to study the shelling in wheels of high load freight railroad cars. The stresses were calculated using Hertz s theory and the Fi
Publicado em: 2000