Issue 55

M. Rahmani et alii, Frattura ed Integrità Strutturale, 55 (2021) 88-109; DOI: 10.3221/IGF-ESIS.55.07

Figure 30: 3D graph for almond pumice.

Figure 31: Displacement changes by changing the blast charge for almond pumice.

Row

Before

Mass C4

Size

Response

Satisfaction

1 2 3 4 5 6

25.28 25.19 25.53 26.69 26.83 26.95

13.26 13.26 13.21 13.02 13.04 12.98

Almond Almond Almond

42.79 42.91 43.05 44.25 44.15 44.53

0.634 0.634 0.627 0.595 0.595 0.588

Pea Pea Pea

Table 13: The values of the optimized points in the experimental test. .

Specimen Thickness (mm)

The type of pumice

Explosive forming C4 (g)

Test number

Pumice sizes

1 2 3 4 5 6 7 8 9

Brown

Peas

10 15 15 15 10 10 10 15

28.5

Black

Almond

20 45 45

Brown

Peas

Black Black Black

Almond Almond Almond Almond

28.5 28.5

Brown Brown

45 20 45 20

Peas Peas Peas Peas

Black Black Black

11.5 13.5 11.5

10 11 12 13

28.5 36.5

Brown Brown

Almond Almond

15 10

20 Table 14: Suggested experiments response surface methodology.

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