Abstract
The purpose of this paper is to draw attention to the fact that the routine application of Saint-Venant's principle in the solution of elasticity problems for sandwich type structures is not justified in general. This is illustrated in the context of the plane problem of elasticity for a sandwich strip composed of two dissimilar isotropic materials. The exponential decay of end effects is characterized in terms of a complex eigenvalue. For the case of a sandwich with relatively soft middle core, the characteristic decay length is shown to be much greater than that for an homogeneous isotropic strip. The results are analogous to those obtained previously by the authors for highly anisotropic and composite materials.
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