Stability of Flat, Clamped, Rectangular Sandwich Panels Subjected to Combined Inplane Loadings.

摘要

The general stability of flat, rectangular sandwich panels loaded by combined biaxial compression, biaxial edgewise bending and edgewise shear is investigated. The analysis is applicable to sandwich structures having isotropic face sheets and orthotropic cores. The analysis procedure is based upon a linear potential energy formulation and the Ritz method of discretization. For the case of clamped boundaries, it is shown that the equation of the potential energy must be minimized by the use of matrices. The analysis leads to an infinite series solution for which the eigenvalues of the equation of matrices are monotonically decreasing. This analysis is presented in detail with the equations for the potential energy presented in three Appendices. The equation presented in Appendix C is the expression used to minimize the potential energy of a flat, clamped sandwich panel. (Author)