NUMERICAL EVALUATION OF FREQUENCY RESPONSES FOR DELAMINATED HONEYCOMBSTRUCTURES

In this study, the finite element method was used to compute the Frequ ency responses of honeycomb structures with disbond (delamination). Th e honeycomb structure was modelled as a three-layer substructure with the use of a three-dimensional solid polyhedron element. The real eige nvalue analysis and frequency response analysis were undertaken to stu dy the natural frequency, amplitude and phase of dynamic response of t he honeycomb structures. With the selected mesh, computations were per formed to obtain the natural frequency, amplitude and phase of honeyco mb structures with free edges or combinations of free and fixed edges. The influence of different boundary conditions as well as different g eometries of the structures on the predictions is discussed. In additi on the influences of applied force, skin thickness and adhesive thickn ess on these parameters are investigated. Conclusions on the effects o f these factors are highlighted.