Free Vibration of Functionally Graded Sandwich Shallow Shells on Winkler and Pasternak Foundations with General Boundary Restraints

Figure 2

Types of curvatures for FGSSS on rectangular planforms: (a) plate; (b) circular cylindrical shell; (c) spherical shell; (d) hyperbolic paraboloidal shell.

(a)

(b)

(c)

(d)