PSI - Issue 14

Pankaj K. Choudha et al. / Procedia Structural Integrity 14 (2019) 191–198 Pankaj K Choudha/ Structural Integrity Procedia 00 (2018) 000–000

196 6

Fig. 5. (a) Pressure Pulse generated by explosive charge; (b) Impulse generated by explosive charges.

Variation of pressure along the length of charge for rectangular 45mm height and ‘V’ section of 60 mm height are given in table 4. Table 4. Pressure along the length of explosive charge (70 mm above the charge). Rectangular Section 'V' Section Distance along the length of explosive charge Peak Pressure (MPa) Peak Pressure (MPa) 0 mm 438.86 1048.9 150 mm 484.35 1348.3 300 mm 566.07 1489.2 450 mm 595.88 1515.1 600 mm 233.14 830.35 The comparison of the peak pressure and impulse of the two charges at a height of 70 mm above the charges at 0 mm and 600 mm along the length of the charge are presented in Fig. 5. (a) & Fig. 5. (b). 3. Experimental study on RHA plate The above numerical simulation has shown the clear significant improvement due to change in the shape of explosive without changing the mass of explosive in the near field regions. The measurement of near field pressure pulse was very difficult and could not be validated through the direct measurement. The failure of RHA steel plate were used as a criteria to assess this effect. The RDX/TNT charges of 1.9 kg of rectangular and ‘V’ section of 60 o were prepared using the casting method with a casing of 5 mm thick polycarbonate as shown in fig 6 (a) and 6(b).

Fig. 6. (a) Rectangular (Flat) section bar explosive charge, (b) 'V' section bar explosive charge.