Issue 67

S. Verenkar et alii, Frattura ed Integrità Strutturale, 67 (2024) 163-175; DOI: 10.3221/IGF-ESIS.67.12

PRE-DAMAGE EXPERIMENTAL

POST-DAMAGE

MODE NO

FEA

% Difference

FEA

EXPERIMENTAL

% Difference

1 2 3 4 5

10.899 62.434 78.811 125.32 191.86

10.88 61.76 84.16

0.17 1.08 6.79 4.95 2.91

9.1272 59.257 77.904 123.49 181.85

9.24 60.8

1.22 2.60 6.76 1.84 5.05

72.64

131.52 197.44

125.76 191.04

Table 2: Comparison of Natural Frequencies (in Hz) for Plate Pre- and Post-Damage.

MODE 1

MODE 2

MODE 4

MODE 3

MODE 5

Figure 6: First five mode shapes of plate pre-damage.

Figure 7 : Separation of plies due to delamination.

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