Bonding adhesive damage study of the secondary cocure reinforcement tensile experiment

The bonding adhesive dehiscence is the primary structure failure is in the tensile static test of the secondary cocure reinforcement of laminates. The damage study about the reinforcement structure of the finite element model (FEM) is consist of laminates damage and the adhesive bonding layer damage. Four different damage criterions are used during damage evolution and predicted failure loading of the adhesive bonding layer. The first adhesive bonding layer damage loading is only about 32.8 percent of the last failure of structure and the failure loading of adhensive bonding layer is also less than the last failure of structure. The first damage and last failure position of structure is located in the layer which connected with the bonding layer, and this damage is the direct remote of the structure failure.