Analytical method of symmetircal delaminationing analysis for sandwich plates

Utilizing the higher order shear deformation theory and variation principle, this paper has set up respectively the differential equations of delamination. area and undelamination area in additional state of axial symmetric delamination problem of sandwich plate, to which the combined solution has been carried out. Owing to the effect of the frontier stress singularity of delamination, the traditional displacement and stress continuity condition are not adaptable between the delamination area and undelamination area, therefore, we put forth a new type of articulation condition, based on which we found the analytic solution of additional state.