Bending of Nonsymmetric Sandwich Beams with Transversely Flexible Core
Publication: Journal of Engineering Mechanics
Volume 117, Issue 9
Abstract
The bending behavior of an unsymmetrical sandwich beam with a flexible, foam‐type core is investigated analytically. The beam consists of different skins, upper and lower, metallic or composite‐laminated, and a soft core. The analysis includes the effects of the flexibility of the core, in the vertical direction, on the bending behavior of the skins, as well as on the overall behavior. The behavior of the beam is a superposition of two substructures; the first one is a beam in which the height of the core remains unchanged while shear effects are included; and the second one is a beam in which the height of the core is not kept and is free of shear stresses. The superposition loads and locations that should be applied to each substructure are determined analytically. The proposed analysis is general and applicable to any type of loading, distributed or concentrated, and allows the loads to be located either at the upper or the lower skins, or at both, yielding different behaviors. The characteristics of the overall behavior, particularly the peeling and the shear stresses between the skins and the core, are studied.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Allen, H. G. (1969). Analysis and design of structural sandwich panels. Pergamon Press, Oxford, London, England.
2.
Frostig, Y., and Baruch, M. (1990). “Bending of sandwich beams with transversely flexible core.” AIAA J., 28(3).
3.
Hetenyi, M. (1958). Beams on elastic foundation. The University of Michigan Press, Ann Arbor, Mich.
4.
Hockman, L. E. (1973). “Sandwich construction and design.” Analysis and design of flight vehicle structure. E. F. Bruhn, ed., S. R. Jacobs & Associates, Inc., Ind.
5.
Holt, D. J., and Webber, J. P. H. (1982). “Exact solution to some honeycomb sandwich beam, plate and shell problems.” J. Strain Anal., 17(1), 1–8.
6.
“Mechanical properties of Hexcel honeycomb materials.” (1982). TSB120, Hexcel Corp., Dubin, Calif.
7.
Monforton, G. R., and Ibrahim, I. M. (1977). “Modified stiffness formulation of unbalanced anisotropic sandwich plates.” Int. J. Mech. Sci., 19, 335–343.
8.
Ogorkiewicz, R. M., and Sayigh, A. A. M. (1973). “Deflection of carbon fiber/acrylic foam sandwich beams.” Composites, 4, Nov., 254–257.
9.
Ojalvo, I. V. (1977). “Departures from classical beam theory in laminated sandwich and short beams.” AIAA J. , 15 (10), 1518–1521.
10.
Pearce, T. R. A. (1973). “The stability of simply‐supported sandwich panels with fiber reinforced face plates,” thesis presented to the University of Bristol, at Bristol, U.K., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
11.
Schwartz, R. T., and Rosato, D. V. (1969). “Structural‐sandwich construction.” Composite engineering laminates, A. G. H. Dietz, ed., The Massachusetts Inst. of Tech Press, Cambridge, Mass., 165–194.
12.
Reissner, E., “Finite deflections of sandwich plates.” J. Aerosp. Sci., 15(7), 435–440.
13.
Reissner, E. (1947). “On bending of elastic plates.” Q. J. Appl. Math., 5(4), 55–68.
Information & Authors
Information
Published In
Copyright
Copyright © 1991 ASCE.
History
Published online: Sep 1, 1991
Published in print: Sep 1991
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.