Structural Adequacy of Freight Car Truck Castings and Wheels

Johnson, Milton R.; IIT Research Institute

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Structural Adequacy of Freight Car Truck Castings and Wheels

1977-10-01
By Johnson, Milton R.

[PDF-2.54 MB]

English

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Details:

Creators:

Johnson, Milton R.
Corporate Creators:

IIT Research Institute
Corporate Contributors:

John A. Volpe National Transportation Systems Center (U.S.) ; United States. Federal Railroad Administration. Office of Research and Development

John A. Volpe National Transportation Systems Center (U.S.) ; United States. Federal Railroad Administration. Office of Research and Development Less -
Subject/TRT Terms:

[+]

Bolsters Car Trucks (Railroads) Casting Failure Fatigue (Mechanics) Fatigue Strength Fatigue Tests Fracture Mechanics Freight Cars Safety Standards Steel Steel Castings Tests
Publication/ Report Number:

DOT-TSC-FRA-77-18 ; FRA/ORD-77/51 ; PB-278 034

DOT-TSC-FRA-77-18 ; FRA/ORD-77/51 ; PB-278 034 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Railroad Administration
NTL Classification:

AGR-INFRASTRUCTURE-Railroads;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Rail Safety;NTL-SAFETY AND SECURITY-Vehicle Design;
Abstract:

The structural adequacy of freight car truck castings and wheels to resist fatigue damage is reviewed. The environmental load data described in an earlier report under this program and additional load data which have only recently become available are used to calculate the expected fatigue life under various assumptions of the stresses present in the components. It is found that under most conditions the components should not develop fatigue cracks. This confirms the observation that there are a relatively small number of fatigue failures of these components in service. Since failures of these components can lead to serious derailments, it is important that the circumstances leading to a higher risk of fatigue failure be identified so that under these circumstances truck components can be subjected to more frequent and stringent inspections under the railroad freight car safety standards of the FRA. The results of tests to determine the fatigue strength of wheel plates are also described. The tests showed that there is a substantial safety margin with respect to fatigue when one considers the effects of lateral loads acting on the wheel
Format:

PDF
Funding:

DOT-TSC-727
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:ba420241bc9ca029912e73ddcaeabf357824c72cdcfa217b7fcd59e7e58f3c96
Download URL:

https://rosap.ntl.bts.gov/view/dot/10327/dot_10327_DS1.pdf
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Structural Adequacy of Freight Car Truck Castings and Wheels

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