United States Department of Transportation
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Estimation of Residual Stresses in Railroad Commuter Car Wheels Following Manufacture [Final Report]
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2003-06-01
[PDF-1.66 MB]
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TRIS Online Accession Number:00969900
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OCLC Number:54347219
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Edition:Final report October 2001
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NTL Classification:NTL-PUBLIC TRANSPORTATION-Rail Transit;NTL-PUBLIC TRANSPORTATION-Transit Safety and Security;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-SAFETY AND SECURITY-Rail Safety;
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Abstract:A computer simulation of the manufacturing process of railroad car wheels is described to determine the residual stresses in the wheel following fabrication. Knowledge of, and the ability to predict, these stresses is useful in assessing the ability of wheels to perform safely under expected service conditions. A finite element analysis is performed which simulated portions of the processing sequence. A heat transfer analysis determines the transient thermal distribution during quenching. The mechanical (stress) analysis employs an elastic-plastic material model with kinematic hardening and includes viscoelastic creep behavior. A baseline scenario is developed to represent the best available estimate of processing parameters and material properties for the analysis. Baseline predictions indicate development of residual circumferential (hoop) compression on the order of 200 MPa (29 ksi) in the wheel rim to a depth of approximately 3.75 cm (1.48 in.). Modifications to the baseline scenario were studied in order to understand which characteristics of the analysis resulted in the most significant changes in the results.
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