Titlebook: Residual Stress in Rails; Effects on Rail Inte Oscar Orringer,Janusz Orkisz,Zdzisław Świderski Book 19921st edition Springer Science+Busine

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Analysis of crack front propagation in contact,tensive research in many scientific centers. Of particular recent interest is the so-called “squat” defect, and a surface crack which propagates from an origin near the rail crown along an inclined path into the rail head. Squat defects have been observed frequently on high-speed BR lines, occasiona

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Effect of load sequence on fatigue life of rail steel,to defects known as detail fractures because of their tendency to comprise the most commonly found defects. Attempts have been made to simulate the actual service conditions of detail fractures by using standard laboratory specimens [[4.1]]..

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On residual stresses in corrugated rails and wheel/rail interaction,phenomenon. Several factors which influence the development of corrugations will be discussed, and the dynamic effects in wheel/rail rolling contact processes are considered. Stress measurement results are also given.

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Prediction of actual residual stresses by constrained minimization of energy,he formation and propagation of cracks in a rail depends on the distribution of total stresses in that rail. The total stresses consist of the live stresses caused by current loads (vehicle wheels, restrained thermal expansion of CWR, etc.) and residual stresses induced by manufacturing and/or prior

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Hybrid finite element method for estimation of actual residual stresses,n a prismatic elastic-plastic body subjected to cyclic loadings. A preliminary model was presented in [[7.1]]. The formulation was further developed and was verified by comparison of numerical results from one-dimensional models with results from independent solutions [[7.2]], [[7.3]]. The revised f

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Estimation of actual residual stresses by the boundary element method,ic-plastic body subjected to cyclic loading. As proposed in Chapter 6, this problem is solved by minimizing the complementary energy of the body in an assumed self-equilibrating stress state, and subject to the yield constraint imposed on the total stresses. The assumed state corresponding to such a

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Enhancement of experimental results by constrained minimization, fields of stress components over the entire body. Both measured experimental data and basic physical relations, that are valid for the sought stress field, are simultaneously taken into consideration. The stress components are found as the solution to a constrained nonlinear optimization of an obje

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On future development of the constrained energy minimization method, is based on a new theoretical formulation of the shakedown problem for actual loadings and resulting residual stresses, in contrast to the classical methods for calculation of the load magnitude at the shakedown limit. The new formulation is based on the fact that the complementary energy of the ac