NIST logo

Publications Portal

You searched on: Author: thomas siewert

Displaying records 11 to 20 of 76 records.
Resort by: Date / Title

11. CTOA Results for X65 and X100 Pipeline Steels:Influence of Displacement Rate
Published: 8/1/2008
Authors: Roni Reuven, Christopher N McCowan, Elizabeth S Drexler, Avigdor Shtechman, Philippe P. Darcis, John Matthew Treinen, R. Smith, J. Merritt, Thomas A. (Thomas A.) Siewert, Joseph David McColskey
Abstract: The toughness and plasticity of steel generally decreases with increasing testing rate. The crack tip opening angle (CTOA) was measured on two types of commercial pipeline steels, API-X65 and API-X100 at a range of displacement rates to characterize ...

12. Dynamic Apparatus for the CTOA Measurement in Pipeline Steels
Published: 8/1/2008
Authors: Avigdor Shtechman, Christopher N McCowan, Roni Reuven, Elizabeth S Drexler, Philippe P. Darcis, John Matthew Treinen, R. Smith, J. Merritt, Thomas A. (Thomas A.) Siewert, Joseph David McColskey
Abstract: When a crack initiates and propagates in a pressurized pipe the only thing that might stop this high-velocity event is the release of internal pressure (decompression) resulting in a deceleration in the crack-propagation rate. This deceleration can b ...

13. Peer Review Report: PHMSA Programs
Published: 5/14/2008
Authors: Thomas A. (Thomas A.) Siewert, Michael Else, Richard Joel Fields, Joe C Bowles, L. James Moore, Philip D. Flenner, Mario Macia, Jerry Rau, Steven E. Powell
Abstract: The Pipeline and Hazardous Materials Safety Administration s (PHMSA) Pipeline Safety Research and Development (R&D) Program held its first structured peer review of active research projects in February 2006 and the most recent peer review on May 2008 ...

14. Peer review report: Pipeline and hazardous materials safety administration, pipeline safety research and development program
Published: 5/14/2008
Authors: Richard Joel Fields, Louis E. Hayden, Thomas J. O'Grady, Joseph David McColskey, Joe C Bowles, T. R. Webb, Christopher N McCowan, Dennis W. Hinnah, Ronald W. Haupt, Thomas A. (Thomas A.) Siewert
Abstract: The purpose of this document is to report findings from the research peer reviews held March 27-29, 2007 for PHMSA's Pipeline Safety Research and Development Program. The findings and recommendations in this report derive from the scoring and comment ...

Published: 3/31/2008
Authors: Thomas A. (Thomas A.) Siewert, Joseph David McColskey, Angelique N Lasseigne
Abstract: In 2007, the National Institute of Standards and Technology greatly expanded its efforts in support of the use of hydrogen as a fuel.   Various NIST divisions have started projects on measurement needs in the areas of flow rates, storage, mater ...

Published: 11/16/2007
Authors: Thomas A. (Thomas A.) Siewert, Ivan Samard¿i¿,, Zvonimir Kolumbi
Abstract: This paper describes the application of an on-line monitoring system for the monitoring, aquisition and processing of key welding parameters. The on-line monitoring system has been successfully applied in practice to measure key welding parameters fo ...

17. The role of metallurgy in the NIST investigation of the world trade center towers collapse
Published: 11/1/2007
Authors: Stephen W Banovic, Timothy J Foecke, William E Luecke, Joseph David McColskey, Christopher N McCowan, Thomas A. (Thomas A.) Siewert, Frank W Gayle
Abstract: On August 21, 2002, on the direction of the U.S. Congress, the National Institute of Standards and Technology (NIST) initiated an investigation into the collapse of the World Trade Center (WTC) towers. In support of the overall investigation goals, t ...

18. Cruciform Fillet Welded Joint Fatigue Strength Improvements by Weld Metal Phase Transformations
Published: 10/17/2007
Authors: Philippe P. Darcis, H. Katsumoto, M C Payares-Asprino, S. Liu, Thomas A. (Thomas A.) Siewert
Abstract: Arc welding typically generates residual tensile stresses in welded joints, leading to deteriorated fatigue performance of these joints. Volume expansion of the weld metal at high temperatures followed by contraction during cooling induces a local te ...

19. Crack Tip Opening Angle Optical Measurement Methods in Five Pipeline Steels
Published: 10/16/2007
Authors: Philippe P. Darcis, Christopher N McCowan, H. Windhoff, Joseph David McColskey, Thomas A. (Thomas A.) Siewert
Abstract: Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture in cases where there is a large ...

20. Failure of Welded Floor Truss Connections During Collapse of the World Trade Center Towers
Published: 9/3/2007
Authors: Stephen W Banovic, Thomas A. (Thomas A.) Siewert
Abstract: As part of the National Institute of Standards and Technology World Trade Center Investigation, failure modes of the connections attaching the composite floor system to the exterior wall of WTC 1 and WTC 2 were surveyed. Metallographic analyses of i ...

Search NIST-wide:

(Search abstract and keywords)

Last Name:
First Name:

Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series