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Researches on Dynamic Behaviours of High Explosives under Magnetically Driven Quasi-Isentropic Compression

Author: CaiJinTao
Tutor: ZhaoFeng
School: Chinese Academy of Engineering Physics
Course: Engineering Mechanics
Keywords: Quasi- isentropic compression experiments Electromagnetic force driving Solid Explosives Quasi- isentropic compression line Computational fluid dynamics
CLC: TQ564
Type: Master's thesis
Year: 2010
Downloads: 36
Quote: 0
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Abstract


The unreacted explosive dynamics of the dynamic load response characteristics important for the security of explosives detonating mechanism and chemical explosion . Solid explosive is a metastable substance contains high energy , the case of the external stimuli occurs a strong chemical reaction reaches a certain threshold . Magnetically driven quasi-isentropic compression loading technology with the shock compression novel loaded technology as between the quasi- static compression loading pressure smoothing , the loading process of entropy increase small temperature rise and low , can be higher than the impact pressure load range , study the the unreacted explosive dynamics . Based on magnetically driven quasi-isentropic compression experimental techniques , laser displacement interferometry technology , combined with the optimized design of the electrode and the sample loading area , to achieve a quasi-isentropic compression load over a wide pressure range within the unreacted solid explosive . The specific contents and results are as follows: 1, based on the a simple wave characteristic line analysis method , the calculated optimized loading pressure waveform , combined experimental apparatus CQ-1.5 1.5mm and 2mm thick explosives in the sample under the quasi-isentropic compression shock formation discharge waveform unreacted explosives quasi isentropic compression loaded drive electrodes and the size of the sample parameters . 2 , interference based the magnetically driven experimental device CQ - 1.5 and laser speed measuring device DPS, unreacted explosives JO-9159 JOB-9003 quasi-isentropic compression loading , particle velocity between the different thickness of the sample and the LiF window curve anti- integral data processing method and one-dimensional Lagrange method of experimental data processing , computing gained JO-9159 and explosives JOB-9003 , 5GPa pressure within experimental isentropic compression line ; 3 , using a one-dimensional fluid dynamics encoding SSS JO-9159 JOB-9003 explosive quasi - isentropic compression process , numerical simulation , good agreement with the calculated particle velocity curve with the experimentally measured particle velocity curve . The simulation results show that the thickness greater than 1.3mm samples began to form shock waves . Strain rate variation curve shows that the experimental sample strain rate in the 105-106 / s magnitude as the thickness of the sample increases , the strain rate spikes narrowed , the peak increase in the loading process of the different thickness samples .

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CLC: > Industrial Technology > Chemical Industry > Explosives industry, match industry > Rampant explosives
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