Numerical Simulation of Effects of AP Particle Size on Impact Initiation of HTPB Propellant

被引：0
|
作者：
Li J. [1 ]
Zhang Y. [2 ]
Wu Y.-Z. [1 ]
Liang Y. [1 ]
Li Z.-X. [3 ]
机构：
[1] Unit 92941, Huludao, 125000, Liaoning
[2] Naval Aviation University, Yantai, 264000, Shandong
[3] Unit 91404, Qinhuangdao, 066000, Hebei
来源：
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2018年 / 41卷 / 03期
关键词：
AP; HTPB propellant; Impact explosion; Numerical simulation; Particle size;
D O I：
10.14077/j.issn.1007-7812.2018.03.015
中图分类号：
学科分类号：
摘要：
Aiming at the impact explosion problem of hydroxyl terminated polybutadiene(HTPB) composite solid propellant induced by the external force, the particle random filling algorithm was developed based on MATLAB software, the numerical simulation of the effect of ammonium perchlorate (AP) particle size on the impact initiation of HTPB propellant was studied through the second development performed on the LS-DYNA platform. The results show that when AP particle size is 2-20μm, the explosion probability of HTPB propellant induced by impact is the lowest. When AP particle size reaches 330-340μm, the explosion probability induced by impact is the highest.Through the meso level study, it is found that the HTPB propellant containing AP particles has two severe stress- strain and temperature change before impact initiation. Through comparing the calculated results when the particle size range is 2-20μm and 330-340μm, it is found that the maximum effective strain before explosion increases by 124% and the maximum temperature increases by 13.14%, the starting point and reaction point of temperature rise and strain accelerate by 34.78%, 10.98% and 52.38%, 28.57%, respectively. © 2018, Editorial Board of Journal of Explosives & Propellants. All right reserved.
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页码：298 / 302
页数：4
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