活性破片的动态压缩力学性能和反应性能

陈鹏; 屈可朋; 全嘉林; 陈荣; 袁宝慧

doi:10.11858/gywlxb.20190769

活性破片的动态压缩力学性能和反应性能

doi: 10.11858/gywlxb.20190769

陈鹏^1,,
屈可朋¹,
全嘉林¹,
陈荣²,
袁宝慧^1,*, ,

1.
西安近代化学研究所，陕西西安　710065
2.
国防科技大学，湖南长沙　410073

基金项目: 国家自然科学基金（11672328）；国家安全重大基础研究项目（05020501）

详细信息

作者简介:
陈　鹏（1990－），男，博士研究生，主要从事新型毁伤元与战斗部技术研究. E-mail: cpsust@163.com

通讯作者:
袁宝慧（1959－），男，研究员，主要从事先进战斗部技术研究. E-mail: ybhybh59@sina.com

中图分类号: O389; TJ55
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出版历程
- 收稿日期: 2019-04-29
- 修回日期: 2019-05-15
- 发布日期: 2019-10-25

Dynamic Compressive Mechanical and Reactive Properties of Reactive Fragment

1.
Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
2.
National University of Defense Technology, Changsha 410073, China

摘要

摘要: 为了研究在冲击作用下烧结和未烧结工艺对活性破片的动态力学性能和反应性能影响，分别使用分离式霍普金森压杆和落锤加载装置对两种工艺的活性破片进行加载，并且对两种实验结果进行了对比。研究结果表明：烧结后的活性破片具有较好的力学性能，并且两种材料都具有明显的应变率效应，动态屈服强度约为静态屈服强度的2.8~3.3倍；落锤加载下烧结后的活性破片更容易发生反应，发生反应的临界落高为1.15 m。研究结果能够反映该材料的力学性能和反应性能。
- 活性破片 /
- 临界反应高度 /
- 反应性能 /
- 屈服强度
Abstract: The split Hopkinson pressure bars (SHPB) and drop-weight are used to study the effects of sintered and unsintered processes on the dynamic mechanical properties and reaction properties of reactive fragments under impact. The results show that the sintered reactive fragments have better mechanical properties. Both materials have obvious strain-rate effects, and the dynamic yield stress is 2.8–3.3 times of the static yield stress. The sintered reactive fragments are easier to react under the load of drop-weight, and the critical drop height of the reaction is 1.15 m. These results can effectively reflect the mechanical and reactive behavior of reactive fragments.
- reactive fragment /
- critical reactive height /
- reactive property /
- yield stress

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图 1 烧结与未烧结破片

Figure 1. Sintered and unsintered samples

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图 2 SHPB系统

Figure 2. Experiment system of SHPB

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图 3 落锤加载实验系统

Figure 3. Experiment system of drop-weight

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图 4 准静态加载下烧结与未烧结材料的应力-应变关系

Figure 4. Static stress-strain relations of sintered and unsintered samples under quasi-static load

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图 5 准静态加载后材料的变形情况

Figure 5. Deformations of sintered and unsintered specimens under quasi-static load

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图 6 不同应变率下的应力-应变曲线

Figure 6. True stress-strain curves at different strain rates

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图 7 1.15 m和1.25 m落高下落锤加载试样的高速摄影图像

Figure 7. Pictures of the samples loaded by drop-weight from 1.15 m and 1.25 m

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图 8 烧结和未烧结试样的SEM图像

Figure 8. SEM pictures of sintered and unsintered samples

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表 1 落锤加载试样的实验结果

Table 1. Experiment results of drop-weight load

Test No.	Material status	Drop height/m	v₁/(m·s^–1)	v₂/(m·s^–1)	Reactive state
1	Sintered	0.80	3.84	0.64	No-react
2		1.00	4.25	0.75	No-react
3		1.10	4.48	0.96	No-react
4		1.15	4.80	1.28	React
5		1.20	4.85	0.96	React
6		1.30	5.12	1.28	React
7	Unsintered	0.80	3.80	0.32	No-react
8		1.00	4.16	0.64	No-react
9		1.20	4.82	0.64	No-react
10		1.25	4.95	1.25	React
11		1.30	5.10	1.28	React

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