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Ares I-X Upper Stage Simulator Residual Stress AnalysisThe structural analyses described in the present report were performed in support of the NASA Engineering and Safety Center (NESC) Critical Initial Flaw Size (CIFS) assessment for the Ares I-X Upper Stage Simulator (USS) common shell segment. 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. The results of this effort served as one of the critical load inputs required to perform a CIFS assessment of the same segment.
Document ID
20080039641
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Raju, Ivatury S. (NASA Langley Research Center Hampton, VA, United States)
Brust, Frederick W. (Engineering Mechanics Corp. of Columbus Columbus, OH, United States)
Phillips, Dawn R. (Lockheed Martin Mission Services Co. Hampton, VA, United States)
Cheston, Derrick (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
August 1, 2008
Subject Category
Structural Mechanics
Report/Patent Number
L-19513
NASA/TM-2008-215339
NESC-RP-08-09/06-081-E
Funding Number(s)
WBS: WBS 510505.03.0701.11
Distribution Limits
Public
Copyright
Public Use Permitted.

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