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기술보고서

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타이틀	Test and Analysis of Sub-Components of Aluminum-Lithium Alloy Cylinders
저자	Haynie, Waddy T.;; Chunchu, Prasad B.;; Satyanarayana, Arunkumar;; Hilburger, Mark W.;; Smith, Russell W.
Keyword	ALUMINUM-LITHIUM ALLOYS;; AXIAL LOADS;; BUCKLING;; COMPRESSION LOADS;; DEFORMATION;; DISPLACEMENT;; FABRICATION;; FAILURE MODES;; HIGH SPEED CAMERAS;; IMAGE CORRELATORS;; PANELS;; STRAIN GAGES;; STRAIN HARDENING
URL	http://hdl.handle.net/2060/20120008171
보고서번호	NF1676L-13166
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Integrally machined blade-stiffened panels subjected to an axial compressive load were tested and analyzed to observe the buckling, crippling, and postcrippling response of the panels. The panels were fabricated from aluminum-lithium alloys 2195 and 2050, and both alloys have reduced material properties in the short transverse material direction. The tests were designed to capture a failure mode characterized by the stiffener separating from the panel in the postbuckling range. This failure mode is attributed to the reduced properties in the short transverse direction. Full-field measurements of displacements and strains using three-dimensional digital image correlation systems and local measurements using strain gages were used to capture the deformation of the panel leading up to the failure of the panel for specimens fabricated from 2195. High-speed cameras were used to capture the initiation of the failure. Finite element models were developed using an isotropic strain-hardening material model. Good agreement was observed between the measured and predicted responses for both alloys.