Study On Explosion Field And JWL Eos Of TATP

The chemical properties of triacetone triperoxide（TATP）are extremely unstable,and the explosion reaction can occur with little heat or even friction and collision.Because its raw materials are easy to obtain and simple to make,it is easy to be used by terrorists to make terrorist attack bombs.In order to study and evaluate the explosion characteristics of TATP,the fireball evolution process of TATP deflagration and explosion was photographed by a high-speed camera.The relationship between the density and detonation velocity of TATP was tested by time interval meter.The explosion field parameters and evolution law of TATP were tested by a pressure test system.The JWL equation of state was calculated by the cylinder experiment of TATP.The main conclusions are as follows:（1）High speed photography was used to observe the fireball evolution process when TATP deflagration and explosion occurred.It was found that the fireball brightness was higher when TATP exploded than when deflagration occurred,and the fireball lasted longer when deflagration occurred.Before deflagration occurred,it would undergo a long sublimation process,and then TATP steam burned and exploded.（2）The detonation velocity of TATP is greatly affected by the change of density in the range of 0.391～0.917 g·cm^-3 and is linearly related to the density.Based on this result,the detonation velocity of TATP can be predicted and adjusted according to the density of TATP,and can be used in experiments requiring specific detonation velocity explosives to do work.（3）In this paper,the PCB pressure sensor is used to measure the pressure field distribution after 6g,10g,16g and 20g explosions.The overpressure,barotropic action time and the attenuation law of specific impulse of the shock wave are studied.The TNT equivalent calculated from the overpressure is 67.3%.（4）The expansion velocity of copper tube driven by 0.55 g·cm^-3 TATP explosion was measured by cylinder experiment,and AUTODYN was used to model and simulate the expansion process of copper tube.The JWL equation parameters of 0.55 g·cm^-3 TATP explosion products were finally determined through continuous correction,simulation and re correction.It is found that the ability of TATP to drive the cylinder is weak,the acceleration time is long,and there is no plastic oscillation in the expansion process of copper tube;The study of JWL equation of state of TATP explosive provides important data support for the explosion simulation of TATP.（5）During the research,it is found that there are very few solid products after TATP explosion.Taking TATP as the explosion source is very conducive to the collection of optical information such as explosion crack propagation in explosion experiments.Figure[25]Table[9]Reference[129]...