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- W97735664 abstract "Intact and aircraft impact-damaged welds from the exterior columns of the World Trade Center towers were evaluated. The fillet welds joining the various steel plates composing the built-up box columns were primarily deposited using submerged arc welding. Characterization of undamaged joints revealed that the welding procedures employed were appropriate relative to contemporaneous standards; no visible surface flaws or subsurface defects were observed. Impact damage of the welds consisted of fracture primarily initiating at and traveling through the heat-affected zone (HAZ) of the steel plates that had rolling planes perpendicular to the travel direction of the aircraft. Failure occurred in this region due to the lower cross-sectional area of the plate and the degraded HAZ mechanical properties (i.e., ductility, toughness with respect to the base plate). Based upon the low-energy, ductile fractures (little plate thinning, slanted fracture surfaces) observed, the failure of the joints absorb only a small fraction of the energy from the impact of the aircraft." @default.
- W97735664 created "2016-06-24" @default.
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- W97735664 date "2006-07-03" @default.
- W97735664 modified "2023-09-23" @default.
- W97735664 title "Characterization of Submerged-Arc Welds From the World Trade Center Towers: As-Deposited Welds and Failures Associated With Impact Damage of the Exterior Columns" @default.
- W97735664 hasPublicationYear "2006" @default.
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