Issue 59

M. Seguini et al, Frattura ed Integrità Strutturale, 59 (2022) 18-34; DOI: 10.3221/IGF-ESIS.59.02

Mode 3 2132.3 2128.3 2122.9 2115.8 2106.8 2060.7 2043.8 2032.9 1998.2 1971.8 1942.5 1931.1 1876.9 1872.8 1822.3 1803.6 1741.9 1672.2 1646.4 1631.1 1619.8 1617.5 2095 2079 1739

Crack depth

Mode 1 417.85 416.75 415.24 413.23 410.65 403.07 398.35 391.36 388.41 375.78 371.97 354.35 349.33 326.81 407.4

Mode 2 1124.8 1124.8 1124.8 1124.8 1124.8 1124.8 1124.8 1124.8 1124.7 1124.7 1124.6 1124.5 1124.5 1124.3 1124.2 1123.9 1123.8 1123.1 1122.7 1121.1 1119.6 1114.6 1098.6 1124 1123

1-1 (mm) 2-2 (mm) 3-3 (mm) 4-4 (mm) 5-5 (mm) 6-6 (mm) 7-7 (mm) 8-8 (mm) 9-9(mm)

10-10 (mm) 11-11 (mm) 12-12 (mm) 13-13 (mm) 14-14 (mm) 15-15 (mm) 16-16 (mm) 17-17 (mm) 18-18 (mm) 19-19 (mm) 20-20(mm) 21-21 (mm) 22-22 (mm) 23-23 (mm) 24-24 (mm) 25-25(mm)

324.9 295.3

283.76 240.05 235.48 161.64 121.48

84.51

36.516 14.212

Table 5: Numerical frequencies of different crack depth (beam I).

Figure 8: Cracked beam II: (a) Finite element model; (b) meshed beam; (c) experimental model.

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