The localized wrinkling instability, and the overall buckling of these panels due to axial compression and shear loading are presented. Numerically the finite strip method, the finite prism method, and the finite layer method are especially efficient in analyzing prismatic members such as these architectural sandwich panels, whereas it would be prohibitive in cost and time to apply the finite element method to these panels. The stability matrices are formulated by minimizing the potential energies with respect to displacements. Axial and shear buckling loads are determined by solving eigenvalue problems. The results compare favorably with published literature for flat sandwich panels. For sandwich panels with cold-formed metal facings, there are no data available for comparison. For wrinkling instability, analytical (boundary value approaches) and experimental methods are used. Close agreement is observed.

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