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Static test induced loads verification beyond elastic limitIncreasing demands for reliable and least-cost high-performance aerostructures are pressing design analyses, materials, and manufacturing processes to new and narrowly experienced performance and verification technologies. This study assessed the adequacy of current experimental verification of the traditional binding ultimate safety factor which covers rare events in which no statistical design data exist. Because large high-performance structures are inherently very flexible, boundary rotations and deflections under externally applied loads approaching fracture may distort their transmission and unknowingly accept submarginal structures or prematurely fracturing reliable ones. A technique was developed, using measured strains from back-to-back surface mounted gauges, to analyze, define, and monitor induced moments and plane forces through progressive material changes from total-elastic to total-inelastic zones within the structural element cross section. Deviations from specified test loads are identified by the consecutively changing ratios of moment-to-axial load.
Document ID
19960031910
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Verderaime, V. (NASA Marshall Space Flight Center Huntsville,AL United States)
Harrington, F. (NASA Marshall Space Flight Center Huntsville,AL United States)
Date Acquired
September 6, 2013
Publication Date
April 17, 1996
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:111443
NASA-TM-111443
SDM 96-1454
Report Number: NAS 1.15:111443
Report Number: NASA-TM-111443
Report Number: SDM 96-1454
Meeting Information
Meeting: SDM Conference
Location: Salt Lake City, UT
Country: United States
Start Date: April 15, 1996
End Date: April 17, 1996
Accession Number
96N29903
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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