Abstract

The dynamic behavior of bebonded sandwich plates at the skin/core interface is analysed. The finite element code COSMOS/M is used to analyse natural frequencies and mode shapes of the sandwich plates with a ellipse shape debonding area. The delamination model has been developed by using the surface-to-surface contact option. In case of surface-to-surface contact, the FE meshes of adjacent plies do no need to be identically. The influence of the diameters ratio of the debonded area, on the modal parameters of clamped sandwich plates is investigated. Parametric calculus of the sandwich plate, having various diameters ratios (Dx/Dy = 0.5; 0.75; 1) for delaminated area, have been considered. It has been observed that all the above mentioned ratios are contributing to the changes in dynamic responses of the sandwich plate.

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