Analysis Method for Elastic Modulus of Typical Gun-propellant under Impact Loading

被引：0
|
作者：
Liu J. [1 ]
Zhao H. [1 ]
He C. [1 ]
Jin J. [1 ]
Zhang Z. [1 ]
Wang Q. [1 ]
Zhao B. [1 ]
机构：
[1] Xi'an Modern Chemistry Research Institute, Xi'an
来源：
Binggong Xuebao/Acta Armamentarii | 2021年 / 42卷 / 02期
关键词：
Digital image correlation; Drop weight impact testing; Elastic modulus; Gun-propellant;
D O I：
10.3969/j.issn.1000-1093.2021.02.007
中图分类号：
学科分类号：
摘要：
The experimental research on drop hammer impacting of gun-propellant was made to obtain an effective analysis method for the elastic modulus of typical gun-propellant under impact loading. The stress and strain curves of gun-propellant during drop hammer impact test were obtained through high-speed photography and digital image correlation method. On this basis, the linear-elastic, nonlinear-elastic and viscoelastic analysis methods are used to get the change laws of elastic modulus of DAGR125-21/19 with impact energy and velocity at normal and low temperatures. The results show that the elastic modulus of gun-propellant changes slightly at normal and low temperatures with the increase in the impact velocity. Furthermore, the magnitude of elastic modulus from viscoelastic analysis is least, the results from linear elastic analysis are close to those from nonlinear elastic analysis, and the elastic modulus of gun-propellant at low temperature is much greater than that at normal temperature. The elastic modulus of SF-3 double-base gun-propellant was studied. It is found that the elastic modulus of SF-3 double-base gun-propellant is equivalent to that of DAGR125-21/19 at normal temperature, but the elastic modulus of the former is much bigger than that of the latter at low temperature. The reliable and accurate elastic modulus of gun-propellant can be derived by using viscoelastic analysis based on digital image correlation method. © 2021, Editorial Board of Acta Armamentarii. All right reserved.
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页码：289 / 296
页数：7
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