Numerical analyses on influence of damage configuration on vibration parameters for lattice sandwich plate

Though many methods exist for detecting damage in a structure, few of them can be used to identify the debonding defect between the surface and inner layer of a lattice truss sandwich plate. In this paper, a vibration signal based nondestructive testing method using Uniform Load Surface (ULS) curvature is applied to detect the delamination defects of the lattice sandwich plate. The feasibility of the approach is investigated through numerical simulation by using commercial software for different damage configurations. The numerical results show that there is a good possibility to detect delamination defects in the lattice sandwich plate from vibration signals by using the ULS curvature strategy.