Elastic Instability of Rectangular Sandwich Panel of Orthotropic Core With Different Face Thicknesses and Materials

[+] Author and Article Information
C. C. Chang, I. K. Ebcioglu

Department of Aeronautical Engineering, Institute of Technology, University of Minnesota, Minneapolis, Minn.

J. Appl. Mech 27(3), 474-480 (Sep 01, 1960) (7 pages) doi:10.1115/1.3644027 History: Received April 30, 1959; Online September 16, 2011


This paper treats the instability of rectangular sandwich panels with nonisotropic cores and faces of different materials or thicknesses. The simply supported panel is loaded with a uniform edge compression. The solution is expressed in terms of a major buckling coefficient, given as the ratio of the critical lateral buckling load to the critical cylindrical buckling load, which is a function of several nondimensional parameters. A single family of curves shows the buckling behavior for all parameters. The effect of a moderate temperature differential between the two faces can be approximately considered by modifying their moduli of elasticity in accordance with their temperature levels. Besides the regular panel instability, a zone of core shear instability is determined and discussed in detail. Numerical examples are presented to illustrate the application of the analysis.

Copyright © 1960 by ASME
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