Effects of wear and service conditions on residual stresses in commuter car wheels
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Effects of wear and service conditions on residual stresses in commuter car wheels

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  • Abstract:
    This paper illustrates application of the shakedown residual stress estimation technique to

    assess the effects of service conditions on wheel residual stresses. The examples described provide the

    technical details on how the technique is practically applied and typical results. Operational conditions

    representative of a commuter railroad have been used in the simulations. Results are presented for a

    baseline commuter vehicle illustrating the effects of loss of wheel tread material due to wear or wheel reprofiling

    and the resulting redistribution of residual stresses.

    Results of this study indicate that the initial residual compressive stress present in the wheel rim can be

    reversed to tension under nominal operating conditions. As it is known that such reversal can lead to the

    formation and growth of thermal cracks originating at the wheel tread, and that such cracks can pose a

    threat to safe rail operations, the ability to predict the influence of service conditions on wheel residual

    stresses becomes a useful tool for assessing proposed changes to operating characteristics.

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