Title of article :
High-order behavior of fully bonded and delaminated circular sandwich plates with laminated face sheets and a “soft” core
Author/Authors :
O. Rabinovitch، نويسنده , , Y. Frostig، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Abstract :
The bending behavior of circular, fully or partially bonded (delaminated), sandwich plates with a ‘‘soft’’ core and
composite laminated face sheets of general layup is investigated. The analytical model derived follows the principles of
the High-Order Sandwich Plate Theory and it is based on equilibrium and compatibility requirements. The variational
principle of virtual work is employed for the derivation of the field equations along with the boundary and continuity
conditions. The delamination considered forms a penny shaped disbonded zone, in which the delaminated faces can slip
horizontally with respect one to another, yet they may be in contact accommodating vertical normal compressive
stresses. The core is assumed a 3D elastic medium and the composite face sheets are modeled using the classical
lamination theory, which yields coordinate dependent constitutive relations. The governing equations take the form of
partial differential equations with variable coefficients. The solution procedure adopts the Galerkin method with
truncated Fourier series in the circumferential direction and the multiple-points shooting method in the radial direction.
Numerical results concerning typical fully and partially bonded sandwich plates are presented and discussed. The results
reveal the effect of the anisotropy of the face sheets on the response of the structure and the influence of the
delaminated area on the behavior of the sandwich plate
Keywords :
Sandwich plate , High order theory , Closed form solution , Compressible core , Delaminations , Composite laminates
Journal title :
International Journal of Solids and Structures
Journal title :
International Journal of Solids and Structures