Finite element nonlinear dynamic analysis of sandwich plates with partially detached facesheet and core

A finite element model has been developed for analyzing of the dynamic response of sandwich plates with partially damaged facesheet-to-core interface. The effect of intermittent dynamic contact between the fragments detached at the damaged interface is taken into account for simulation of sandwich platesʹ vibrations. Transient and forced dynamic responses of the sandwich plates damaged by debonding have been obtained by using the ABAQUS/Explicit code. The influence of the local strongly nonlinear contact behavior on the global dynamics of the sandwich plates is examined.