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Weld Residual Stress and Distortion Analysis of the ARES I-X Upper Stage Simulator (USS)An independent assessment was conducted to determine the critical initial flaw size (CIFS) for the flange-to-skin weld in the Ares I-X Upper Stage Simulator (USS). The Ares system of space launch vehicles is the US National Aeronautics and Space Administration s plan for replacement of the aging space shuttle. The new Ares space launch system is somewhat of a combination of the space shuttle system and the Saturn launch vehicles used prior to the shuttle. Here, a series of weld analyses are performed to determine the residual stresses in a critical region of the USS. Weld residual stresses both increase constraint and mean stress thereby having an important effect on fatigue and fracture life. While the main focus of this paper is a discussion of the weld modeling procedures and results for the USS, a short summary of the CIFS assessment is provided.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Raju, Ivatury
(NASA Langley Research Center Hampton, VA, United States)
Dawicke, David
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Cheston, Derrick
(NASA Glenn Research Center Cleveland, OH, United States)
Phillips, Dawn
(Lockheed Martin Corp. Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
July 27, 2008
Subject Category
Structural Mechanics
Report/Patent Number
PVP 2008-61247
Meeting Information
Meeting: 2008 ASME Pressure Vessels and Piping Conference
Location: Chicago, IL
Country: United States
Start Date: July 27, 2008
End Date: July 31, 2008
Funding Number(s)
WBS: WBS 510505.
Distribution Limits
Public Use Permitted.
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