Experimental Study of Emptying A-Ⅸ-Ⅱ Explosive Using Submerged Cavitation Water Jet

被引：0

作者：

Zhang, Yao-Xuan ^{[1
]}

Lian, Peng ^{[1
]}

Kang, Chao ^{[1
]}

Chen, Song ^{[1
]}

Lei, Jing-Hua ^{[2
]}

Luo, Zhi-Long ^{[1
]}

Li, Meng ^{[1
]}

Chen, Hou-He ^{[3
]}

机构：

[1] Xi'an Modern Chemistry Research Institute, Xi'an,710065, China

[2] China Ordnance Industry Institute of Experiment and Test, Huayin,714200, China

[3] Chemical Engineering Institute, Nanjing University of Science & Technology, Nanjing,210094, China

来源：

Hanneng Cailiao/Chinese Journal of Energetic Materials | 2020年 / 28卷 / 04期

关键词：

Superconducting materials - Temperature measurement - Particle size - Scanning electron microscopy - Stress-strain curves - Thermocouples - Differential scanning calorimetry - Cavitation - Shock waves - Strain rate;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To explore the process and safety of emptying ammunition charge by submerged cavitation water jet, relative experiment al research was carried out with A-Ⅸ-Ⅱ explosive as the experimental object. The split Hopkinson pressure bar (SHPB) device was applied to obtain stress-strain mechanical properties of A-Ⅸ-Ⅱ. The emptying experimental system was set up to investigate the impact crushing effect and mechanism of cavitation water jet on A-IX-II. Scanning electron microscope (SEM) was used to characterize the morphology of broken particles and gain the mesoscopic breakup mode of A-Ⅸ-Ⅱ. The internal temperature of A-Ⅸ-Ⅱ during the impact process of cavitation water jet was measured with a self-designed thermocouple temperature measurement device, and the experimental safety was discussed by combining the results of differential scanning calorimetry (DSC) of A-Ⅸ-Ⅱ. The results show that stress-strain curves of A-Ⅸ-Ⅱ include three stages: brittle-elastic stage, nonlinear elastoplastic stage and strain softening stage, and the damage under dynamic loading shows strain rate effect. It is greatly available to use cavitation water jet to empty A-Ⅸ-Ⅱ explosive in fifteen minutes and the maximum particle size of the collected A-Ⅸ-Ⅱ explosive is no more than 3 cm. The damage of A-Ⅸ-Ⅱ is mainly caused by the strong impact of micro-jet and shock wave when the cavitation bubble collapses. The mesoscopic breakup mode is mainly the inter crystalline separation of crystals from binder and aluminum powder, accompanied by a small amount of trans granular phenomenon, and no crystal breakup is found. It is safe to empty A-Ⅸ-Ⅱ explosive by using submerged cavitation water jet as the highest temperature in the experiment is 50 ℃, which is lower than the temperature required for thermal initiation (160 ℃). © 2020, Editorial Board of Chinese Journal of Energetic Materials. All right reserved.

引用

页码：358 / 364