Plastic Bonded Explosives Job-9003 Dynamic Characteristics And Constitutive Relation Of Experimental Research

JOB-9003 is one kind of Plastic Bonded Explosive (PBX), which is of important applications in industries. Under external stimulations, safety of chemical explosions is determined by the hot spot formation mechanisms, and when probe into the mechanisms of hot spot formation; it has to refer to the constitutive relations of the material. Therefore the study on mechanical behavior of JOB-9003 is very important.We use SHPB to make the JOB-9003 sample be loaded. Through this SHPB experiment, we study the mechanical response characteristics of JOB-9003 in the middle/low strain-rate. By improving the means in the experiment, we achieve three stress-strain curves in three kinds of strain-rate. After analyzing this serial of stress-strain curves in different strain-rates, we found that the liner relationship between no only compression strength and strain-rate was satisfactory but also the elastic modulus. Usingσ= E₀·(ε-b·ε″)·(1+c·((?)-(?)₀)) as constitutive model, the computational result is more accord with the experimental result.We use electried gun to fire the fly-plate. The fly-plate is at the so high speed that the sample which is knocked by the fly-plate is definitely in high strain-rate. We use VISAR to record the JOB-9003/LiF interface particle velocity. We achieve a serials of velocity wave profiles in different distance at the same impact velocity. According to the wave profiles which we achieved from the experiment, we calculated the energy-deposit rate with the distance.In the Reverse Taylor Test, we use high speed camera to get the tube grain deformation process. Bass on the analysis of the photos, we found that the part of specimens near to the anvil has destruction behavior in the experiments. And with time passing, this behavior get exacerbated, therefore structural strength and material strength get decreased, and the deformation get exacerbated.