Energy-release characteristics of typical reactive materials under explosive loading

被引：0
|
作者：
Du N. [1 ]
Zhang X. [1 ]
Xiong W. [1 ]
Yang Y. [2 ]
Huang B. [1 ]
Chen H. [1 ]
机构：
[1] School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
[2] Jiangsu Yongfeng Mechanics Co. Ltd., Nanjing, 210014, Jiangsu
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2020年 / 40卷 / 04期
关键词：
Energy-release characteristics; Explosive loading; Reactive materials; Shock-induced chemical reaction;
D O I：
10.11883/bzycj-2019-0239
中图分类号：
学科分类号：
摘要：
In order to study the reaction characteristics of reactive materials under explosive loading, two typical reactive materials, namely Al/PTFE and Al/Ni, as well as two inert materials, namely Al2O3/PTFE and Al2O3/PTFE/W, were manufactured by powder compaction. Explosion-driven tests were conducted on the four materials, by combining with the high-speed photography technology, far-infrared thermal imager testing technology and peak overpressure testing technology. The characteristics of explosive fireball, distribution of temperature and peak overpressure of blast shock waves were analyzed for different materials. Furthermore, the chemical energy released from the reactive materials was considered in the empirical calculation model to estimate the peak overpressure of blast shock waves. The influence of the released energy on the blast shock wave was analyzed by the model. The results show that during the explosion driving process, the reactive materials undergo such stages as reaction under strong loading, debris generation and scattering around, impact on steel plates and subsequent reaction. Reactive materials can strengthen the air shock wave produced by explosive explosion, and only part of the chemical reaction occurs at the moment of explosion loading. © 2020, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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