Now showing items 1-10 of 27
Grain-boundary structures in polycrystalline metals at the nanoscale
(American Physical Society, 2000-07-01)
We present a detailed analysis of grain-boundary structures in computer-generated Cu and Ni three-dimensional nanocrystalline samples. The study includes both totally random and textured microstructures with grain sizes ...
Diffusion mechanisms in Cu grain boundaries
(American Physical Society, 2000-08-01)
We investigate atomic mechanisms of grain boundary (GB) diffusion by combining molecular dynamics (MD), molecular statics, the harmonic approximation to atomic vibrations, and kinetic Monte Carlo (KMC) simulations. The ...
Acoustic X-wave reflection and transmission at a planar interface: Spectral analysis
(Acoustical Society of America, 2000-01-01)
The spectral structure of a three-dimensional X-wave pulse incident on a planar surface of discontinuity is examined. Introducing a novel superposition of azimuthally dependent pulsed plane waves, it is shown for oblique ...
Broadband control of plate radiation using a piezoelectric, double-amplifier active-skin and structural acoustic sensing
(Acoustical Society of America, 2000-02-01)
The potential of a piezoelectric, double-amplifier active-skin with structural acoustic sensing (SAS) is demonstrated for the reduction of broadband acoustic radiation from a clamped, aluminum plate. The active-skin is a ...
Field performance of epoxy-coated reinforcing steel in Virginia bridge decks
(Virginia Center for Transportation Innovation and Research, 2000-02-01)
In this study, the corrosion protection performance of epoxy-coated reinforcing steel (ECR) was evaluated using approximately 250 concrete cores from 18 bridge decks in Virginia. The decks were 2 to 20 years old at the ...
Environmental Influence on the Bond Between a Polymer Concrete Overlay and an Aluminum Substrate
(Virginia Center for Transportation Innovation and Research, 2000-04-01)
Chloride-ion-induced corrosion of reinforcing steel in concrete bridge decks has become a major problem in the United States. Latex-modified concrete, low-slump dense concrete, and hot-mix asphalt membrane overlays are ...
Shear And Extensional Rheology Of Sparsely Branched Metallocene-Catalyzed Polyethylenes
(AIP Publishing, 2000-09-01)
The purpose of this study was to identify any rheological effects that are consistent with the presence of sparse levels of long chain branching (LCB) in three commercial metallocene-catalyzed polyethylenes (MCPE) all of ...
Extending Interoperability of Digital Libraries: Building on the Open Archives Initiative
This document describes the proceedings of the 2000 ACM DL OAI Workshop. Workshop topics include technical issues, Virginia Tech's report on open archives work, and highlights of the Santa Fe Convention.
Manufacturing Of A Fiber Optic Young's Double Pinhole Interferometer For Use As A 3D Profilometer
(Optical Society of America, 2000-05-01)
The method used to manufature a Young's double pinhole interferometer is discussed. This interferometer is destined to be used in a surface profilometer using two wavelengths so that the zero order fringe can be determined. ...
Open Archives Work at Virginia Tech
This presentation describes the Open Archives Initiative, projects such as the Computer Science Teaching Center and the National Digital Library of Theses and Dissertations (NDLTD), the MARIAN catalog, and the organizational ...