A model for rolling contact failure

摘要: Abstract Rolling contact stress and failure analyses were conducted for the Hadfield steel (manganese steel) Bainitic alloy (J7). The first is used in diamond crossings frogs railroad industry while second a candidate such applications. A series of fatigue experiments on these alloys to establish damage parameters. proposed parameter incorporated role both shear normal ranges `critical' plane upon surveying all planes at material point. Maximum local plastic strains, accumulated three-dimensional residual stresses computed under pure rolling conditions p o / k (Hertzian pressure normalized by yield shear) values range 4.0 8.0 using semi-analytical approach. multiaxial stress–strain plasticity model developed authors was calculations strain fields. advantage this over previous models that it predicts correct trends ratchetting rate non-proportional loading response. For life prediction, new combined ratchetting–multiaxial presented. different depths below surface interrogated with determine location where will originate. results show exhibits longer lives same Hertzian materials finite when pressure, ratio, exceeded 4.0.