Evaluation of service-induced residual stresses in railroad commuter car wheels

Gordon, Jeff; Jones, Jerrel A.; Perlman, A. Benjamin

i

Evaluation of service-induced residual stresses in railroad commuter car wheels

1999-11-01
By Gordon, Jeff ; Jones, Jerrel A. ; Perlman, A. Benjamin

File Language:

English

Details

Creators:

Gordon, Jeff ; Jones, Jerrel A. ; Perlman, A. Benjamin
Corporate Contributors:

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

Proceedings
Geographical Coverage:

United States
Corporate Publisher:

United States. Department of Transportation. Federal Railroad Administration
Abstract:

Analyses of the effects of service conditions on the distribution of ; residual stresses in railroad commuter car wheels are presented. Novel ; software has been applied to estimate the effects of service conditions ; on the as-manufactured state of these wheels. Contact loads resulting ; from wheel and rail interaction and thermal loads from on-tread ; braking are considered. Results indicate that contact stresses acting ; alone result in increased net rim hoop compression. However, thermal ; stresses due to frictional heating reverse the as-manufactured residual ; compressive state. In particular, high-performance stop braking may ; result in large net hoop tension in the rim. When contact and thermal ; loads interact, the effects of braking dominate the process. The ; presence of tensile residual hoop stress at the wheel tread has been ; shown to favor the formation and growth of fatigue cracks, threatening ; the safety of train operations. The paper provides a description of the ; analytical methodology and results of its application to a ; representative class of commuter service. Comparisons of the ; predicted depth of rim stress reversal with the thermal cracking ; observed in the wheels of this fleet provides confidence in the ability ; of the technique to assess the likelihood of thermal crack development ; in other types of commuter operations and in railroad freight service.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/8523/dot_8523_DS1.pdf
File Type:

[PDF - 420.43 KB]
Collection(s):

Volpe Center ; Federal Railroad Administration
Main Document Checksum:

urn:sha256:3c3e763fd18dfbbe921d3fe1dd05b590dda3bb0f95ff78d5619f411d45b33a43

File Language:

English

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