Analysis of minimum rail size in heavy axle load environment

Jeong, David Y.; Perlman, A. Benjamin; John A. Volpe National Transportation Systems Center (U.S.)

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Analysis of minimum rail size in heavy axle load environment

2013-04-15
By Jeong, David Y. ; Perlman, A. Benjamin

[PDF-754.38 KB]

English

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Alternative Title:

Proceedings of the 2013 Joint Rail Conference, April 15-18, 2013, Knoxville, TN
Creators:

Jeong, David Y. ; Perlman, A. Benjamin

Jeong, David Y. ; Perlman, A. Benjamin Less -
Corporate Creators:

John A. Volpe National Transportation Systems Center (U.S.)
Subject/TRT Terms:

[+]

Axle Load Force Cracking Fatigue (Mechanics) Freight Cars Freight Trains Metal Fatigue Propagation Life Rail (Railroads) Rail Failures Rail Integrity Railroad Tracks Track Capacity Weight Wheel Loads
Publication/ Report Number:

JRC2013-2401
Resource Type:

Proceedings
Geographical Coverage:

United States
Corporate Publisher:

American Society of Mechanical Engineers ; Institute of Electrical and Electronics Engineers

American Society of Mechanical Engineers ; Institute of Electrical and Electronics Engineers Less -
Abstract:

The effects of increasing axle loads on rail integrity are examined in this paper. In the present context, rail integrity refers to the prevention and control of rail failures. Rail failures usually occur because cracks or defects develop and grow from cyclic forces caused by the repeated passage of wheel loads over the rails, i.e. metal fatigue. Once a crack or defect has formed, it may grow to a critical size and cause a sudden fracture of the rail. Moreover, a broken rail may cause a train to derail. Rail integrity evaluations are performed in this paper by applying a framework developed previously to estimate track capacity. The framework is exercised using two difference critieria while varying axle loads: (1) allowable rail deflections and bending stresses, and (2) metal fatigue characterized in terms of propagation life (also referred to as slow crack growth life). The engineering analyses based on these criteria are described. Results from these analyses are used to provide the rational basis for estimating the minimum rail size under heavy axle loads.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:536c8f743c95e0f449af1c49c3ce24b77a321a761d2ff5e0f952a8663fce6a4b
Download URL:

https://rosap.ntl.bts.gov/view/dot/10076/dot_10076_DS1.pdf
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Analysis of minimum rail size in heavy axle load environment

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