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Development of a non-destructive, quantitative residual stress assessment tool

Award Information
Agency: Department of Transportation
Branch: N/A
Contract: DTRT57-11-C-10024
Agency Tracking Number: 11.1-PH2-003
Amount: $150,000.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: 111PH2
Solicitation Number: DTRT5711RSBIR1
Solicitation Year: 2011
Award Year: 2011
Award Start Date (Proposal Award Date): 2011-06-10
Award End Date (Contract End Date): 2011-12-10
Small Business Information
1626 S. Cherry St., Tomball, TX, 77375-1234
DUNS: 829462105
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Angelique Lasseigne
 (303) 304-9785
Business Contact
 Joshua Jackson
Title: President
Phone: (303) 895-7146
Research Institution
A nondestructive tool will be developed to quatitatively assess residual stress in pipelines from the exterior and through coatings. Residual stress is a critical factor that determines the cracking susceptibility of pipeline steels, but existing methods for measuring mechanical damage in pipeline steels are incapable of quantifying the residual stress levels. A larger gouge or dent does not necessarily signify worse damage that a smaller gouge or dent; it is more important to focus on the actual residual stress levels induced by damage. Knowledge of the residual stress levels provides an accurate means to assess the severity of the damage and improve the pipeline integrity, ultimately reducing the amount of unneccessary removal and repair applications. The unique use of low frequency impendance sensors will allow for through thickness pipeline integrity assessment. Phase I will low-frequency impendance analysis to perform in-situ residual stress measurements on simulated mechanically damaged pipeline steel to compare with finite element and other stress estimation techniques. Phase II and Phase III efforts will develop a calibrated portable low frequency impedance toll for in-situ assessment of pipeline damage without removal of coatings.

* Information listed above is at the time of submission. *

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