Expansion of an ideally plastic cylindrical shell in response to detonation products

Odintsev, V. A.; Selivanov, V. V.; Chudov, L. A.

doi:10.1007/bf00850671

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…Numerical simulations of detonation propagation in this ED showed, in particular, that the diameter of 100 mm is close to the minimum diameter at which the pressure at the interface between the sand and the ED wall would not exceed the elastic limit of the cylinder material (1.3-1.5 GPa) for the most powerful charge (D = 4.13 km/sec) detonated in the ED. It was also found that in this case, the thickness of the sand layer (33 mm) was sufficient for the maximum expansion of the charge shells (up to a certain radius R max ) by their detonation products to be limited by the value R max ≈ (1.5-1.8)R 0 [5], at which crack formation, at least, just begins. That is, it could be believed that the following experimental condition important for correct interpretation of the results was satisfied: the initial mass of the transformation products stayed in a confined volume in the ED for as long time as possible.…”

Section: Experimental Explosive Devicementioning

confidence: 94%

Energy release of mixed explosives during propagation of a nonideal detonation under conditions similar to the operation conditions of a blasthole charge

Anan'in

Dremin

Cunnigham

et al. 2007

Combust Explos Shock Waves

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Detonation experiments were performed in a specially developed explosive device simulating a blasthole using charges of fine-grained and coarse-grained (granular) 30/70 TNT/ammonium nitrate mixtures of identical density 0.89 g/cm 3 in steel shells with an inner diameter of 28 mm and a wall thickness of 3 mm at detonation velocities of 4.13 and 2.13 km/sec, respectively. Despite significant differences in detonation velocity (pressure), identical expansion of the charge shells was observed. On the other hand, numerical simulations of detonation propagation in the explosive device with the corresponding velocities ignoring the possibility of energy release behind the shock front show that the expansion of the charge shell is always greater in the case of a high-velocity regime. It is concluded that under the conditions simulating detonation propagation and the work of explosion products in a blasthole, effective additional energy release occurs behind the low-velocity (nonideal) detonation front.

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Section: Experimental Explosive Devicementioning

confidence: 94%