Sandwich beams comprising identical face sheets and a square honeycomb core were manufactured from carbon fiber composite sheets. Analytical expressions were derived for four competing collapse mechanisms of simply supported and clamped sandwich beams in three-point bending: core shear, face microbuckling, face wrinkling, and indentation. Selected geometries of sandwich beams were tested to illustrate these collapse modes, with good agreement between analytic predictions and measurements of the failure load. Finite element (FE) simulations of the three-point bending responses of these beams were also conducted by constructing a FE model by laying up unidirectional plies in appropriate orientations. The initiation and growth of damage in the laminates were included in the FE calculations. With this embellishment, the FE model was able to predict the measured load versus displacement response and the failure sequence in each of the composite beams.
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Quasi-Static Three-Point Bending of Carbon Fiber Sandwich Beams With Square Honeycomb Cores
B. P. Russell,
B. P. Russell
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
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T. Liu,
T. Liu
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
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N. A. Fleck,
N. A. Fleck
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
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V. S. Deshpande
V. S. Deshpande
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
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B. P. Russell
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
T. Liu
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
N. A. Fleck
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UK
V. S. Deshpande
Department of Engineering,
University of Cambridge
, Trumpington Street, Cambridge CB2 1PZ, UKJ. Appl. Mech. May 2011, 78(3): 031008 (15 pages)
Published Online: February 15, 2011
Article history
Received:
November 2, 2010
Revised:
December 7, 2010
Posted:
December 9, 2010
Published:
February 15, 2011
Online:
February 15, 2011
Citation
Russell, B. P., Liu, T., Fleck, N. A., and Deshpande, V. S. (February 15, 2011). "Quasi-Static Three-Point Bending of Carbon Fiber Sandwich Beams With Square Honeycomb Cores." ASME. J. Appl. Mech. May 2011; 78(3): 031008. https://doi.org/10.1115/1.4003221
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