Issue 66

K. Saada et alii, Frattura ed Integrità Strutturale, 66 (2023) 191-206; DOI: 10.3221/IGF-ESIS.66.12

Figure 5: Experimental results for: undamaged specimen, specimen with hole-notched and specimen with elliptical –notched.

RSM modelling In Tab. 2, experimental results are listed with models (ANN and RSM) according to two inputs, reflecting sample geometry and sample cross-sections, with either Young‘s Modulus or stress as output.

N°

Input variables

Output variables

Geometry Specimen section (mm 2 )

Maximum Stress (MPa)

Young's Modulus (MPa )

EXP

ANN

RSM

EXP

ANN

RSM

1 2 3 4 5 6 7 8 9

-1 -1 -1 -1 -1

102.555 97.524 83.913 102.684 90.2979 86.7162 84.6945 86.296 90.5692 85.4642 87.4324 87.318 85.1332 88.33 86.31

18.404 21.060 24.221 20.391 22.366 11.008 5.6846 11.213 17.404 14.171 45.767 41.950 42.132 40.133 39.576

19.204 21.051 24.180 19.602 22.672 10.957 12.134 11.507 14.047 41.610 41.775 41.211 41.255 41.794 9.425

19.518 20.793 24.078 19.485 22.567 12.078 11.425 11.715 12.471 41.899 41.396 42.566 42.498 41.198 11.79

1261.79 1423.36 1684.47 1356.42 1526.02 545.09 967.12 547.59 899.84 794.25 1858.00 1836.78 1713.70 1858.79 1793.80

1375.474 1448.134 1719.382 1364.197 1465.360 617.176 953.758 617.706 887.028 555.458 1847.381 1857.097 1719.878 1748.445 1857.939

1311-084 1410-441 1671-552 1308-516 1550-464 760-212 745-283 726-357 741-370 780-666 1812-549 1824-658 1796-414 1798-062 1829-385

0 0 0 0 0 1 1 1 1 1

10 11 12 13 14 15

Table 2: Experimental and modeling results of stress and Young‘s Modulus.

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