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Displaying 26 - 50 of 1456

Mass Absorption Coefficient of Tungsten and Tantalum,1450 eV to 2350 eV: Experiment, Theory, and Application

January 1, 2003
Author(s)
Zachary H. Levine, S Grantham, Charles S. Tarrio, D Patterson, I McNulty, T M. Levin, A L. Ankudinov, J J. Rehr
… the WERB approved article Mass Absorption Coefficient of Tungsten and Tantalum, 1450 to 2350 eV: Experiment, Theory, … coefficient, mass absorption, tantalum, tungsten … Mass Absorption Coefficient of Tungsten and Tantalum,1450 eV to 2350 eV: Experiment, Theory, …

CRITICAL TEMPERATURE OF AXIALLY LOADED STEEL MEMBERS WITH WIDE-FLANGE SHAPES EXPOSED TO FIRE

January 1, 2021
Author(s)
Ana Sauca, Rachel Chicchi, Chao Zhang, Lisa Choe
… developed to evaluate critical temperatures of structural steel compression and tension members exposed to fire. The … influencing factors, e.g., mechanical properties of steel, member slenderness, and axial load ratios. Statistical … the variation in the ambient- temperature yield stress of steel (assumed with 95% confidence interval) has a …

Analysis of Structural Steel in the World Trade Center Investigation

October 16, 2008
Author(s)
Frank W. Gayle, Richard J. Fields, Stephen W. Banovic
… by MSEL, is the metallurgical analysis of structural steel from the Twin Towers and WTC 7. The analysis includes … failure modes, and temperature excursions seen by the steel. … Analysis of Structural Steel in the World Trade Center Investigation … building research, structural steel, technical investigation, World Trade Center …

Collisional-Radiative Modeling for Highly-Charged Ions of Tungsten

April 23, 2013
Author(s)
Yuri Ralchenko
… collisional-radiative modeling of highly-charged ions of tungsten that are relevant to fusion research. The status of … tungsten, spectra, collisional-radiative modeling, … Collisional-Radiative Modeling for Highly-Charged Ions of Tungsten …

Coupling Between Octahedral Tilting and Ferroelectric Order in Tetragonal Tungsten Bronze-Structured Dielectrics

February 19, 2017
Author(s)
Igor Levin, M Stennett, D I. Woodward, A R. West, I Reaney
… the onset of classic ferroelectric behavior in tetragonal tungsten bronze-like dielectrics BaLaxNd1-xNb3Ti2O15. The … where ao bo 12.4 and co 4 refer to an ideal tetragonal tungsten bronze cell. In a manner reminiscent of … ferroelectrics, octahedral tilting, relaxor, tetragonal tungsten bronze …

Finite element modeling of structural steel component failure at elevated temperatures

March 12, 2016
Author(s)
Mina S. Seif, Joseph A. Main, Jonathan M. Weigand, Therese P. McAllister, William E. Luecke
… dependent stress-strain relationships for structural steel and structural bolts were combined with a plastic … Journal of Constructional Steel Research … strain, finite element analysis, material modeling, steel connections, structural fire effects … Finite element modeling of structural steel component failure at elevated temperatures …

Influence of Fire on the Shear Capacity of Cold-Formed Steel Framed Shear Walls

November 7, 2018
Author(s)
Matthew S. Hoehler, Blanca Andres Valiente
… lateral force- resisting systems used in cold-formed steel construction under sequential thermal (fire) and … (earthquake) loading. Wall specimens with gypsum-sheet steel composite sheathing, Oriented Strand Board (OSB) sheathing, or steel strap bracing were tested. The results indicate that …

Mass Absorption Coefficient of Tungsten and Tantalum, 1450 eV to 2350 eV: Experiment, Theory, and Application

January 1, 2003
Author(s)
Zachary H. Levine, S Grantham, Charles S. Tarrio, D Paterson, I McNulty, T M. Levin, A L. Ankudinov, J J. Rehr
… The mass absorption coefficient of tungsten and tantalum was measured with soft x-ray photons … formalism; the predicted structure was observed for tungsten and to a lesser degree tantalum as well.Separately, … the spectra at the 25 % level and are observed for both tungsten and tantalum. We applied these results to …

Seismic Assessment of a Steel Moment Frame Designed Per ASCE 7 with ASCE 41

July 13, 2011
Author(s)
Matthew S. Speicher, John L. Harris
… STESSA 2012: Behaviour of Steel Structures in Seismic Areas … Seismic performance assessment, steel moment frame, seismic design … STESSA 2012: Behaviour of Steel Structures in Seismic Areas Proceedings … Seismic Assessment of a Steel Moment Frame Designed Per ASCE 7 with ASCE 41 …

Additive Manufacturing of Steels and Stainless Steels

August 1, 2020
Author(s)
Carelyn E. Campbell, Mark R. Stoudt, Fan Zhang
… reviews the classification of the different types of steels, the most common AM processes used for steel and the … Additive Manufacturing of Steels and Stainless Steels …

Prototype Implementation of an Automated Structural Steel Tracking System

September 1, 2002
Author(s)
K M. Furlani, D T. Latimer, David E. Gilsinn, Alan M. Lytle
… on-site metrology and metrology-based data for tracking steel frame construction. The purpose of the implementation … for the identification and tracking of structural steel subsystems. The successful integration and … system enables a field worker to identify and track a steel member s final position and orientation on the job site. …

Density Dependence of the Forbidden Lines Ni-Like Tungsten

June 14, 2007
Author(s)
Yuri Ralchenko
… $3d^94s$ $(5/2,1/2)$ J = 3and J = 2 states in the Ni-like tungsten are shown to exhibit a strongdependence on electron … forbidden lines, Ni-like tungsten, plasma diagnostics, tokamaks, x-ray spectra … Density Dependence of the Forbidden Lines Ni-Like Tungsten …

Localized fire tests on steel beams with different end restraints

November 1, 2017
Author(s)
Selvarajah Ramesh, Mina S. Seif, Lisa Choe
… Two 6.2-m span I-shaped structural steel beams were tested under combined structural and open … The 9th International Symposium on Steel Structures … Fire, End restraints, Steel beams, Experimental … Localized fire tests on steel beams with different end restraints …

Accurate Modeling of Benchmark X-ray Spectra from Highly-Charged Ions of Tungsten

October 26, 2006
Author(s)
Y Ralchenko, Joseph N. Tan, John D. Gillaspy, Joshua M. Pomeroy, E Silver
… for the benchmark x-ray spectrum of highly-charged tungsten ions in the range between 3 \AA \ and 10 \AA … of the kinetic simulation of the non-Maxwellian tungsten plasma. The convergence between theory and … multipoles, highly-charged ions, radiative transitions, tungsten …

Hydrogen embrittlement in ferritic steels

October 6, 2020
Author(s)
May L. Martin, Matthew J. Connolly, Frank W. DelRio, Andrew J. Slifka
… to the “hydrogen embrittlement” of ferritic steels due to specific challenges associated with these steels coupled with the global difficulties with gauging … the structure-property-performance relations of ferritic steels subjected to mechanical loading in a hydrogen …

Modeling of double-angle connections for robustness evaluation of steel gravity frames

October 13, 2016
Author(s)
Jonathan Weigand, Judy Liu, Joseph Main
… been developed for evaluating the structural robustness of steel gravity frames. The component-based models were … analysis, nonlinear analysis, progressive collapse, steel structures … International Workshop on Connections in Steel Structures 2016 … of double-angle connections for robustness evaluation of steel gravity frames …

Direct Growth and Fabrication of Tungsten Coated GaN Nanowire Probes on Cantilevers for Scanning Probe Microscopy

May 13, 2022
Author(s)
Kristen Genter, Matthew Brubaker, Samuel Berweger, Jonas Gertsch, Kris A. Bertness, Pavel Kabos, Victor Bright
… These cantilevers with NW probe tips are coated with tungsten by atomic layer deposition to take measurements on … gallium nitride, nanowires, scanning microwave microscopy, tungsten. … Direct Growth and Fabrication of Tungsten Coated GaN Nanowire Probes on Cantilevers for …

Development of a Robotic Structural Steel Placement System

September 1, 2002
Author(s)
Alan M. Lytle, Kamel S. Saidi, William C. Stone
… Systems Division (ISD), is researching robotic structural steel placement as part of a project to develop an Automated Steel Construction Testbed (ASCT). The ASCT project was … advanced tools and methodologies to speed the erection of steel structures while maintaining or enhancing standards for …

Ordered Structure and Thermal Expansion in Tungsten Bronze Pb 2 K 0.5 Li 0.5 Nb 5 O 15

August 12, 2014
Author(s)
Kun Lin, Yangchun Rong, Hui Wu, Qingzhen Huang, Li You, Yang Ren, Longlong Fan, Jun Chen, Xianran Xing
… structure and thermal expansions of a new tetragonal tungsten bronze (TTB) ferroelectrics Pb 2 K 0.5 Li 0.5 Nb 5 O … Thermal expansion, tungsten bronze, ordering, crystal structure … Ordered Structure and Thermal Expansion in Tungsten Bronze Pb 2 K 0.5 Li 0.5 Nb 5 O 15 …

BEHAVIOR OF STEEL COMPONENTS SUBJECTED TO LOCALIZED FIRE

June 11, 2014
Author(s)
Chao Zhang, John L. Gross, Lisa Y. Choe
… Recent numerical studies on the behavior of steel components subjected to a localized fire are presented. … simulations were conducted to predict the steel temperature distribution, the deformation mode and … and the buckling behavior of unrestrained and restrained steel columns. Heat fluxes from a localized fire to the …

Immersive Virtual Reality for Steel Structures

September 1, 2003
Author(s)
Robert R. Lipman
… paper describes an immersive virtual reality system for steel structures. The system integrates standard models and formats for representing structural steel and three-dimensional graphic objects with a framework … The result is an immersive virtual reality display of steel structures that includes all parts from beams and …

Analysis of EUV spectra from N-shell tungsten ions observed with an electron beam ion trap

July 3, 2018
Author(s)
Tapasi Das, Yuri Podpaly, Joseph Reader, John D. Gillaspy, Yuri Ralchenko
… Extreme ultraviolet spectra of highly charged tungsten ions were produced with an electron beam ion trap at … EBIT, EUV, tungsten, highly-charged ions, spectra, collisional-radiative … Analysis of EUV spectra from N-shell tungsten ions observed with an electron beam ion trap …
Displaying 26 - 50 of 1456
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