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原文传递 Effects of Wear and Service Conditions on Residual Stresses in Commuter Car Wheels.

题名：	Effects of Wear and Service Conditions on Residual Stresses in Commuter Car Wheels.
作者：	gordon, j. perlman, a. b.
关键词：	commuter car wheels,wear,service conditions,residual stresses/wheel tread/
摘要：	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. / Supplementary Notes: Prepared in cooperation with Tufts Univ., Medford, MA. Dept. of Mechanical Engineering. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告