PSI - Issue 12

A. De Luca et al. / Procedia Structural Integrity 12 (2018) 578–588 De Luca A./ Structural Integrity Procedia 00 (2018) 000 – 000

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Fig. 5. Displacement field induced by the wave propagation at different frames.

According to Fig. 5, it can be noticed that damages modeled according to the deleting technique (Fig. 5.b and Fig. 5.d) reflect guided waves much more than damages modeled according to the softening technique. This can be attributed to the fact that the deleting technique introduces new free edges inside the winglet and to the fact that the softening technique introduces a less severe damage, since the elastic material properties are lowered of 70%. Fig. 6 shows the comparison of the RMSD damage index values, achieved by the experimental tests and by all performed simulations. Only the damage indexes calculated with reference to the sensors surrounding the damage (sensors 4, 6, 7, 8 and 9) have been reported in Fig. 6.