Issue 55

A. Ata et alii, Frattura ed Integrità Strutturale, 55 (2021) 159-173; DOI: 10.3221/IGF-ESIS.55.12

Values of pressure with scaled distances less than 1 m/kg 1/3 didn’t show a fair agreement with the empirical equations because of the formation of soil crater and the heaving of the soil.

Figure 5: Results of the empirical and finite element.

Figure 6: Pressure-time history in soil.

Soil crater When a blast wave hits the ground surface, the ground surface starts to scour and detonation gases penetrate the surface to form ejecta, which is thrown into the air [8]. The apparent crater radius and depth are measured relative to the original surface as shown in Fig. 7. At 0.03 second, the finite element analysis predicts the apparent crater radius, R a , of 1.69 m and the apparent crater depth, D a , of 1.39 m as shown in Fig. 8.

Figure 7: The apparent crater radius and depth, which is measured relative to the original surface.

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