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Author: elizabeth drexler
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1. FATIGUE CRACK GROWTH OF TWO PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT
Published: 10/22/2013
Authors: Andrew J Slifka, Elizabeth S Drexler, Nicholas Nanninga, Yaakov Levy, Joseph David McColskey, Robert L Amaro
Abstract: Fatigue crack growth tests were conducted on two pipeline steel alloys, API 5L X52 and X100. Baseline tests were conducted in air, and those results were compared with tests conducted in pressurized hydrogen gas. All tests were run at (load ratio) R ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911967

2. Modeling the Fatigue Crack Growth of X100 Pipeline Steel in Gaseous Hydrogen
Published: 8/20/2013
Authors: Robert L Amaro, Neha N. Rustagi, Andrew J Slifka, Elizabeth S Drexler, Kip Findley
Abstract: Hydrogen is likely to play a key role (worldwide) in a future clean energy economy. Although pipeline transmission appears to be the most economical means to transport gaseous hydrogen, fundamental understanding of the deleterious effects of hydroge ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910899

3. Modeling flat to slant fracture transition in CTOA specimens using the computational cell methodology
Published: 2/23/2013
Authors: Christopher N McCowan, Jacques Besson, Elizabeth S Drexler
Abstract: Macroscopicmode I ductile crack propagation in thin metallic sheets often starts in mode I as a flat triangle whose normal corresponds to the loading direction. After some limited extension, the crack becomes slanted and propagates under local mixed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911051

4. AGING-INDUCED ANISOTROPY OF MECHANICAL PROPERTIES IN STEEL PRODUCTS: IMPLICATIONS FOR THE MEASUREMENT OF ENGINEERING PROPERTIES
Published: 9/16/2011
Authors: Mark D. Richards, Elizabeth S Drexler, James R Fekete
Abstract: Strain aging in low-carbon steels is a well-known strengthening phenomenon, the typical results of which are an increase in yield stress and/or an increase in the extent of discontinuous yielding. Aging effects are generally characterized through th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907405

5. 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

6. 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

7. 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 Allen 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

8. 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

9. 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 Allen 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

10. 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 Allen 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



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