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Fracture Testing of Integral Stiffened StructureLaboratory testing was conducted to evaluate safety concerns for integrally-stiffened tanks that were found to have developed cracks during pressurization testing. Cracks occurred at fastener holes where additional stiffeners were attached to the integrally-stiffened tank structure. Tests were conducted to obtain material properties and to reproduce the crack morphologies that were observed in service to help determine if the tanks are safe for operation. Reproducing the cracking modes observed during pressurization testing required a complex loading state involving both a tensile load in the integrally-stiffened structure and a pin-load at a fastener hole.
Document ID
20080043620
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Newman, John A. (NASA Langley Research Center Hampton, VA, United States)
Smith, Stephen W. (NASA Langley Research Center Hampton, VA, United States)
Piascik, Robert S. (NASA Langley Research Center Hampton, VA, United States)
Dawicke, David S. (Analytical Services and Materials, Inc. Hampton, VA, United States)
Johnston, William M. (Lockheed Martin Engineering and Sciences Co. Hampton, VA, United States)
Willard, Scott A. (Lockheed Martin Engineering and Sciences Co. Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
October 1, 2008
Subject Category
Metals And Metallic Materials
Report/Patent Number
NASA/TM-2008-215530
L-19526
Report Number: NASA/TM-2008-215530
Report Number: L-19526
Funding Number(s)
WBS: WBS 698259.02.07.07.03.03
Distribution Limits
Public
Copyright
Public Use Permitted.

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