Abstract
This paper presents the frequency parameter analysis of bi-directional functionally graded (2D-FG) multi-span sandwich beams by using a high order deformation theory. The beams consist of three layers, the upper face of the sandwich beam is made of ceramic, the lower face is made of 2D-FG and the core is made of 1D-FG. The material properties of the beam are assumed to vary continuously in the thickness and longitudinal directions by a power-law distribution. The frequency parameter of the sandwich multi-span beam is computed with the finite element method. The accuracy of the derived formulation is confirmed by comparing the obtained results with the published data. The effects of material and number of spans on the frequency parameter of the beam are examined and discussed.
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