Issue 49

A. Bendada et alii, Frattura ed Integrità Strutturale, 49 (2019) 655-665; DOI: 10.3221/IGF-ESIS.49.59 663 Delamination size Mode 1 Mode 2 Mode 3 Mode 4 30 mm 131.9 Hz 265.67 Hz 305.99 Hz 350.42 Hz 60 mm 105.71 Hz 241.90 Hz 268.77 Hz 279.13 Hz 90 mm 85.65 Hz 154.86 Hz 164.99 Hz 228.58 Hz 120 mm 67.60 Hz 94.90 Hz 104.86 Hz 219.45 Hz Table 13 : Frequencies and corresponding mode shapes of damaged composite plate.