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STS-133/ET-137 Tanking Test Photogrammetry AssessmentFollowing the launch scrub of Space Shuttle mission STS-133 on November 5, 2010, an anomalous condition of cracked and raised thermal protection system (TPS) foam was observed on the External Tank (ET). Subsequent dissection of the affected TPS region revealed cracks in the feet of two Intertank (IT) metallic stringers. An extensive investigation into the cause(s) and corrective action(s) for the cracked stringers was initiated, involving a wide array of material and structural tests and nondestructive evaluations, with the intent to culminate into the development of flight rational. One such structural test was the instrumented tanking test performed on December 17, 2010. The tanking test incorporated two three-dimensional optical displacement measurement systems to measure full-field outer surface displacements of the TPS surrounding the affected region that contained the stringer cracks. The results showed that the radial displacement and rotation of the liquid oxygen (LO2) tank flange changed significantly as the fluid level of the LO2 approached and passed the LO2 tank flange.
Document ID
20120014465
Document Type
Conference Paper
Authors
Oliver, Stanley T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 26, 2013
Publication Date
April 23, 2012
Subject Category
Structural Mechanics
Report/Patent Number
M11-0925
M12-1660
Meeting Information
Meeting: 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Location: Honolulu, HI
Country: United States
Start Date: April 23, 2012
End Date: April 26, 2012
Sponsors: American Society for Composites, American Society of Civil Engineers, American Society of Mechanical Engineers, American Helicopter Society, Inc., American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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