NDLI: The Effects of Wheelset Position and Operating Environment on Rolling Contact Fatigue

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Scott, M. Cummings Krupowicz, Paul
Copyright Year	2008
Abstract	The Wheel Defect Prevention Research Consortium (WDPRC) conducted analyses of wheel impact load detector (WILD) data to explore how wheelset position and operating environment affect rolling contact fatigue (RCF). The typical three-piece freight car truck used in North America produces higher tangential wheel/rail contact forces on the wheelset in the lead position than on the wheelset in the trail position of a truck as a car negotiates a curve. An analysis of WILD data shows that these higher forces are contributing to more shelling damage on wheelsets that are consistently in the lead position of a truck. Datasets in which the cars are frequently oriented with the A-end leading show the largest percentage of elevated WILD readings in the lead position of the lead truck (axle 4) followed by the lead position of the trail truck (axle 2). Likewise, datasets in which the cars are frequently oriented with the B-end leading show the largest percentage of elevated WILD readings in the lead position of the lead truck (axle 1) followed by the lead position of the trail truck (axle 3). Additionally, datasets in which there is an equal mix of car orientations show a much more evenly distributed location of elevated WILD readings. Another analysis of WILD data from five trainsets of nearly identical cars shows that any differences in wheel tread damage due to component differences are insignificant in comparison to the differences in wheel tread damage associated with environmental factors. While this analysis does not address component specification differences that could potentially have a large influence on shelling (such as M-976 trucks in comparison to standard trucks), it does show that environmental factors can play a large role in wheel tread damage. Car routing and loading characteristics were investigated as possible wheel damage factors. It appears that cars running on routes through terrain with longer, steeper grades may be prone to increased wheel shelling, probably due to thermal mechanical shelling (TMS). Side-to-side imbalanced loading appears to play a minor role in wheel shelling for two of the five trainsets.
Sponsorship	Rail Transportation Division
Starting Page	53
Ending Page	60
Page Count	8
File Format	PDF
ISBN	9780791843345
DOI	10.1115/RTDF2008-74014
e-ISBN	9780791838334
Conference Proceedings	ASME 2008 Rail Transportation Division Fall Technical Conference
Language	English
Publisher Date	2008-09-24
Publisher Place	Chicago, Illinois, USA
Access Restriction	Subscribed
Subject Keyword	Impact Wheel Thermal mechanical shelling Shell Rolling contact fatigue Fatigue Rolling contact Wheels Wheelsets
Content Type	Text
Resource Type	Article

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