DETECTING DELAMINATIONS IN A COMPOSITE BEAM USING ANTI-OPTIMIZATION

The present study proposes a detection technique for delaminations in a laminated beam. The proposed technique optimizes the spatial distrib ution of harmonic excitation so as to magnify the difference in respon se between the delaminated and intact beam. The technique is evaluated by numerical simulation of two-layered aluminum beams. Effects of mea surement and geometric noise are included in the analysis. A finite el ement model for a delaminated composite, based on a layer-wise laminat ed plate theory is used in conjunction with a step function to simulat e delaminations