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Scaling effects in the static large deflection response of graphite-epoxy composite beamsScaling effects in the large deflection response of graphite-epoxy composite beams was investigated. Eight different scale model beams ranging from 1/6 to full-scale were subjected to an eccentric axial compressive load to promote large bending deformations and failures. Beams having laminate stacking sequences including unidirectional, angle ply, cross ply, and quasi-isotropic were tested to examine a wide variety of composite response and failure modes. The model beams were loaded under scaled test conditions until catastrophic failure. Data acquired included load, end displacement, and strain measurements, and qualitative failure measurements. The experimental data is compared to a large rotation beam analysis and a finite element model analysis. Results from the tests indicate that the beam response becomes nonlinear. Failure modes are consistent between scale models within a laminate family, however, a significant scale effect is observed in strength of the scaled beams.
Document ID
Document Type
Conference Paper
Jackson, Karen E.
(Army Aerostructures Directorate Hampton, VA, United States)
Fasanella, Edwin L.
(Planning Research Corp. Hampton, VA., United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1989
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
NAS 1.15:101619
Meeting Information
AHS National Technical Specialists'' Meeting on Advanced Rotorcraft Structures(Williamsburg, VA)
Funding Number(s)
PROJECT: RTOP 505-63-01-11
Distribution Limits
Work of the US Gov. Public Use Permitted.

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NameType 19890017472.pdf STI