Monitoring Longitudinal Rail Stress Using Diffuse Ultrasonic Backscatter

Turner, Joseph A.

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Monitoring Longitudinal Rail Stress Using Diffuse Ultrasonic Backscatter

2017-09-01
By Turner, Joseph A.

File Language:

English

Details

Creators:

Turner, Joseph A.
Corporate Creators:

University of Nebraska--Lincoln
Corporate Contributors:

United States. Federal Railroad Administration. Office of Railroad Policy and Development ; United States. Federal Railroad Administration. Office of Research, Development, and Technology
Subject/TRT Terms:
Publication/ Report Number:

DOT/FRA/ORD-17/15
Resource Type:

Tech Report
Geographical Coverage:

Nebraska ; United States
Corporate Publisher:

United States. Federal Railroad Administration. Office of Research, Development, and Technology ; United States. Federal Railroad Administration. Office of Railroad Policy and Development
Abstract:

In this report, research was conducted at the University of Nebraska-Lincoln pertaining to the use of ultrasound scattering from polycrystalline grains to estimate and monitor stress in rail. The report presents a comprehensive discussion of the theoretical model of the scattering process, including all measurement parameters, such as the properties of the ultrasonic transducers. The results showed that the grain scattering was sensitive to changes in applied mechanical or thermal stresses, and that each transducer configuration had a different sensitivity to the changes in stress, as expected. This grain scattering approach could be used to quantify the microstructure of rail in the field as a function of position. However, experimental variations could not be reduced to the point of stress estimates being made reliably by using the approaches examined here.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/37339/dot_37339_DS1.pdf
File Type:

[PDF - 5.85 MB]
Collection(s):

Federal Railroad Administration
Main Document Checksum:

urn:sha256:74a4e5dcbc95abe2d893eb1c262e84dd908b138becf6be0398f7fddeaa94fff5

File Language:

English

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