USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Load Environment Characterization of Tank Car Stub Sill During Revenue Operations

Document Series
Technical Reports
Report Number
: DOT/FRA/ORD-23/34
Office
RDI-22
Subject Hazardous Materials, Rolling Stock
Keywords
Tank Cars, Rail, Stub Sill Failures, Impact Test, Yard Operation, Mainline Operation, Main Operation, Car Coupling, Draft Gear, Instrumented Couplers

Fractures in the stub sills of tank cars pose a significant problem for the rail industry due to the potential for damage to the tank structure and possible release of the contents. Previous FRA research revealed that high magnitude coupling forces that occur in yard operations have the potential to exceed yield limits of mild steel. A research team conducted a cooperative test program to characterize coupling loads for tank cars in yard operations. In a continuation of this research, the team evaluated revenue service for both main and yard operations for 10 months and 14,000 miles. The testing showed that the train dynamics from mainline and yard operations are nearly equally important for longitudinal coupler forces and the resulting stub sill strains.


DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact fradevops@dot.gov.
Last updated: Friday, September 29, 2023