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A study is made of the effect of the flexural stiffness of the face sheets on tebuckling of elastic curved plates and cylindrical shells of sandwich construction subject, to axial compression. The study shows that when the core is very weak in shear, the flexural stiffness of the face sheets can have an important effect on the buckling load. Simple formulas are developed which give good approximations to the buckling load for most practical ranges of the parameters where the effect of face-sheet stiffness is important. Results of these formulas are compared with exact results for an infinitely long curved plate over a large range of sandwich-sheel parameters. The results are based on a linear buckling theory for sandwich shells of the Donnell type.
Results are presented for the effect of flexural stiffness of face sheets on the buckling of elastic cylindrical sells of sandwich construction subjected to axial and lateral loading. This study shows that when the core is very weak in shear the flexural stiffness of the face sheets can significantly increase the buckling load. This increase is shown to be much larger for axially loaded shells than for laterally loaded ones. Graphical results are given for a wide range of the significant parameters. The results are based on a linear buckling theory for sandwich shells of the Donnell type, which takes into account the asymmetry of the sandwich faces.