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You searched on: Author: elizabeth drexler

Displaying records 21 to 30 of 46 records.
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21. Fracture of X100 Pipeline Steel: Combined Experimental-Numerical Process
Published: 8/26/2011
Authors: Mordechai Szanto, Christopher N McCowan, Elizabeth S Drexler, Joseph David McColskey
Abstract: Accurate characterization of material fracture properties is necessary for reliable numerical prediction of rupture in gas pipelines. In the current work the ductile fracture properties for high strength X100 pipeline steel, was evaluated, using expe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907848

22. MEASUREMENT OF CTOA OF PIPE STEELS USING MDCB AND DWTT SPECIMENS
Published: 9/27/2010
Authors: Christopher N McCowan, S. Xu, W. R. Tyson, R. Eagleson, Elizabeth S Drexler, J. David McColskey, Philippe P. Darcis
Abstract: Two types of specimen for crack tip opening angle (CTOA)measurement have been investigated for pipeline applications,i.e., the modified double cantilever beam (MDCB) (at NIST)and the drop-weight tear test (DWTT) specimen (at CANMET). Results of effe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905067

23. SE(T) Testing of Pipeline Welds
Published: 9/27/2010
Authors: Elizabeth S Drexler, Yong-Yi Wang, Jeffrey W Sowards, Marc Dvorak
Abstract: Single edge-notch tension (referred to as SE(T) or SENT) tests are increasingly being used in the pipeline community, as they are a laboratory-scale fracture toughness test, capable of being performed on linepipe steels and welds. The constraint and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904977

24. Crack tip opening angle: applications and developments in the pipeline industry
Published: 7/1/2009
Authors: Elizabeth S Drexler, Philippe Darcis, Richard Joel Fields, Joseph David McColskey, Christopher N McCowan, Roni Reuven, Thomas A. (Thomas A.) Siewert
Abstract: One of the most difficult safety problems associated with gas pipeline to be solved is the control of ductile fracture propagation. To address this issue, the crack tip opening angle (CTOA) criterion is becoming one of the more widely accepted proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900921

25. Quantifying Anisotropic Elastic Material Properties of Biological Tissue Using Membrane Inflation
Published: 2/9/2009
Authors: Elizabeth S Drexler, J. E. Bischoff
Abstract: Determination of material parameters for soft tissue frequently involves regressing material parameters for nonlinear, anisotropic constitutive models against experimental data from heterogeneous tests.  Here, parameter estimation using results ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853614

26. CTOA Measurements of Welds in X100 Pipeline Steel
Published: 10/3/2008
Authors: Elizabeth S Drexler, Philippe P. Darcis, Christopher N McCowan, John Matthew Treinen, Avigdor Shtechman, Roni Reuven, Thomas A. (Thomas A.) Siewert, Robert Smith, J. Merritt, Joseph David McColskey
Abstract: A suite of tests characterizing X100 pipeline steels was initiated at the National Institute of Standards and Technology (NIST) in Boulder. Part of the test matrix included testing the toughness of the base metal, welds, and heat-affected zones (HAZ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854069

27. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854079

28. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854082

29. Stiffening of the Extrapulmonary Arteries in Chronic Hypoxic Pulmonary Hypertension
Published: 7/1/2008
Authors: Elizabeth S Drexler, J. E. Bischoff, Christopher N McCowan, Andrew J Slifka, Timothy P Quinn, Robin Shandas, Dunbar Ivy, K. R. Stenmark
Abstract: It is increasingly appreciated that changes in the compliance properties of large blood vessels are critical determinants of ventricular afterload and ultimately dysfunction. Little is known of the mechanical properties of large vessels in the settin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50522

30. Interaction of environmental conditions: Role in the reliability of active implantable devices
Published: 6/7/2007
Authors: Elizabeth S Drexler, Andrew J Slifka, Nicholas Barbosa, John W. Drexler
Abstract: Present techniques for assessing the reliability of active implantable medical devices (AIMDs) rely on testing one or two environmental conditions at a time. But the interaction of these environmental conditions may have a greater impact on reliabili ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50532



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