MODELING OF PETN INITIATION BY AN ELECTRON BEAM WITH NANOSECOND DURATION
Numerical modeling of PETN initiation has been carried out by an electron pulse. A system of the equations of unbound thermoelasticity has been solved. An implicit difference circuit was used. Experimental distribution of absorbed energy density of an electron beam was approximated by a third degree polynom. Phase transition (PETN fusion) and the dependence of activation energy of an exothermic reaction from mechanical pressure were taken into account. Distributions of temperature, pressure, deformation, displacement of particles, and the dynamics of an acoustic pulse of compression - stretching were calculated.