PSI - Issue 66

Umberto De Maio et al. / Procedia Structural Integrity 66 (2024) 459–470 Author name / Structural Integrity Procedia 00 (2025) 000–000

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Fig. 5. Comparison between the normalized frequencies of the modes 1, 4, 6, and 7 with respect to the envelopes of the experimental data of (Hamad et al., 2015), and bilinear frequency of (Chati et al., 1997).

Fig. 6. Modal Curvature (MC) damage factor of the modes 1, 4, 6, and 7 for all the investigated damage levels at the unloading phase.