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Cracks in Flow Liners and Their ResolutionCracks were detected in flow liners at the gimbal joints in the LH2 feedlines of the space shuttle's main engines. The cracks initiated at defects in the drainage slots of the flow liners and grew due to high cycle fatigue. Fracture mechanics analyses were conducted to evaluate the life of the liners. These analyses yielded extremely short lives in the presence of small surface or corner cracks. A high fidelity detection method, edge replication, was used to detect the very small cracks. The detected cracks were removed by polishing and the surface quality of the slots was reestablished to improve life of the liners.
Document ID
20060001748
Acquisition Source
Langley Research Center
Document Type
Other
Authors
Harris, C. E.
(NASA Langley Research Center Hampton, VA, United States)
Raju, I. S.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2005
Subject Category
Spacecraft Design, Testing And Performance
Meeting Information
Meeting: ICCES 2005 - International Conference on Computational & Experimental Engineering and Sciences
Location: Chennai
Country: India
Start Date: December 1, 2005
End Date: December 6, 2005
Funding Number(s)
OTHER: 23-104-08-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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