Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Application of Ultrasonic Impact Treatmen to In-Service Signal Mast Arms
Author: Amanda Palmatier, Karl Frank
Source: Center for Transportation Research the University of Texas at Austin
Publication year 2005
Document number: 2005133
Number of pages: 45
Abstract:
Abstract
The application of Ultrasonic Impact Treatment (UIT) to signal mast arms in the field is
described. UIT has been demonstrated in the laboratory to provide a simple means to improve
the fatigue performance of the fillet weld of connection of the mast arm tube to the end plate.
The procedures used in the field are detailed and the time required for a repair documented. A
fatigue test of a mast arm treated in the field is presented. The fatigue test indicated that the
UIT treatment improved the performance of the connection to the level of a connection with a
thicker end plate. UIT provides a cost effective means of increasing the service life of the mast
arms at intersections where galloping oscillations of the mast arms have been observed.
Key Words: UIT, Ultrasonic, Impact, Treatment, fatigue, mast arm, Ferguson, signal
45 pages
Download full text pdf file
www.shotpeener.com
This page last revised: 04/24/2008