Detonation Loading Research Articles

A simple but subtle model for the analysis of shell-like structures

This paper continues the critical discussion of the new shell model first explored in [1–3]. The adopted idealisation may be considered a natural two-dimensional generalisation of a beam model which proved successful in the analysis of mechanical impact problems. The satisfactory applicability of the model for engineering purposes is demonstrated on an elasto-plastic shell segment exposed to a detonation loading. In such dynamic situations, the model is used in conjunction with a purely explicit temporal algorithm. However, it has also been tested in static cases and also in dynamic examples computed with an implicit temporal algorithm. The authors conclude that the model is best suited for the original explicit dynamic algorithm. However, static considerations yield useful insights into the performance of the model. In particular, we note its close association with the finite difference scheme for triangular grids.

Energy transfer to a plane incompressible piston under detonation loading

Energy transfer to a plane incompressible piston under detonation loading

Energy Transfer to a Rigid Piston under Detonation Loading

The flow following the impact of a plane detonation front, in a condensed organic explosive, on a rigid piston is obtained by a finite difference procedure. The equation of state E = Pv/(γ−1) is used for the gaseous explosion products with γ equal to 2.5, 3.0, and 3.5. Explicit formulas for the piston motion are obtained analytically for γ = 3. The effects of the detonation parameters and the explosive-mass to piston-mass ratio on the terminal velocity of the piston and on the energy transmitted to the piston are described. For γ = 2.5 to 3.5, the terminal velocity of the piston depends almost entirely on the chemical energy released in the explosion and on the explosive-mass to piston-mass ratio; i. e., for a fixed chemical energy, the total energy transmitted to the piston is insensitive to the form of the detonation wave.