Study on energy release characteristics of reactive material casings under explosive loading  

作　　者：Ning Du Wei Xiong Tao Wang Xian-feng Zhang Hai-hua Chen Meng-ting Tan 

机构地区：[1]School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing,Xiaolingwei 200,Jiangsu,210094,China [2]School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Yudaojie 29,Jiangsu,211106,China

出　　处：《Defence Technology（防务技术）》2021年第5期1791-1803,共13页Defence Technology

基　　金：the Fundamental Research Funds for the Central Universities(No.30920021108);Open Foundation of Hypervelocity Impact Research Center of CARDC(20200106).

摘　　要：Reactive Materials(RMs),a new material with structural and energy release characteristics under shockinduced chemical reactions,are promising in extensive applications in national defense and military fields.They can increase the lethality of warheads due to their dual functionality.This paper focuses on the energy release characteristics of RM casings prepared by alloy melting and casting process under explosive loading.Explosion experiments of RM and conventional 2A12 aluminum alloy casings were conducted in free field to capture the explosive fireballs,temperature distribution,peak overpressure of the air shock wave and the fracture morphology of fragments of reactive material(RM)warhead casings by using high-speed camera,infrared thermal imager temperature and peak overpressure testing and scanning electron microscope.Results showed that an increase of both the fireball temperature and air shock wave were observed in all RM casings compared to conventional 2A12 aluminum ally casings.The RM casings can improve the peak overpressure of the air shock wave under explosion loading,though the results are different with different charge ratios.According to the energy release characteristics of the RM,increasing the thickness of RM casings will increase the peak overpressure of the near-field air shock wave,while reducing the thickness will increase the peak overpressure of the far-field air shock wave.

关 键 词：Reactive materials Explosive loading Shock-induced chemical reaction Energy release characteristics FRAGMENTATION 

分 类 号：TQ560.1[化学工程—炸药化工]