球形破片侵彻下钢/铝复合靶板的失效模式与吸能机理

周楠; 王金相; 张亚宁; 郭海涛; 蒋敬

doi:10.11883/bzycj-2016-0131

球形破片侵彻下钢/铝复合靶板的失效模式与吸能机理

doi: 10.11883/bzycj-2016-0131

1.
南京森林警察学院刑事科学技术系, 江苏南京 210023
2.
南京理工大学瞬态物理重点实验室, 江苏南京 210094
3.
中国北方车辆研究院, 北京 100072

基金项目:

国家自然科学基金项目 11602113

国家自然科学基金项目 11272158

中央高校基本科研业务费专项基金项目 LGZD201603

江苏省自然科学基金项目 BK20161055

江苏省自然科学基金项目 BK20151353

详细信息

作者简介:
周楠(1986—)，男，博士，讲师，nudge@163.com

中图分类号: O385
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-13
- 修回日期: 2016-08-10
- 刊出日期: 2018-01-25

Failure mode and energy absorption mechanism of steel/aluminum composite plates impacted by spherical fragment

1.
Department of Criminal Science and Technology, Nanjing Forest Police College, Nanjing 210023, Jiangsu, China
2.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
3.
China North Vehicle Research Institute, Beijing 100072, China

摘要

摘要: 为研究复合靶板自身结构对其防护性能的影响，针对面密度相同的两层钢/铝、三层钢/铝/钢爆炸复合板以及均质钢板，采用系列弹道实验和LS-DYNA3D非线性有限元程序分析了复合靶板在球形破片侵彻作用下的失效模式和吸能机理，讨论了靶板层数、厚度和界面结合情况对失效模式的影响。研究结果表明：较其他因素而言，界面结合状态对靶板失效模式的影响最明显，当界面结合良好时，各层靶板均发生剪切冲塞破坏，而当结合界面发生拉伸失效时，较薄的背板以延性扩孔破坏为主；随着靶板总厚度的增大，靶板更易发生剪切冲塞破坏；当靶板的面密度和总厚度分别相等时，三层复合靶板的防护性能优于双层靶板。
- 失效模式 /
- 吸能机理 /
- 爆炸复合板 /
- 结合界面
Abstract: In order to investigate the influence of target structure on the protective performance, series of ballistic experiments and LS-DYNA 3D finite element code were adopted to research the failure mode and energy absorption mechanism of two-layer (steel/aluminum) and three-layer (steel/aluminum/steel) explosive welded targets, as well as a monolithic steel target, which were perforated by spherical fragments. The effects of the layer number, thickness and the combination of the interface on the failure mode were analyzed based on the experimental and numerical results obtained. The results show that the influence of the combination of the target interfaces on the failure mode is the most obvious as compared with the other influencing factors. The fracture mechanism of different plates were shearing and plugging when the interface was well bonded but, when the bonding interface failed due to tension, the thinner rear plate failed mainly due to ductile prolonging deformation. With the increase of the total thickness, the targets were more apt to suffer damage resulting from shearing and plugging. The protective performance of the three-layer composite target is superior to that of the two-layer one with the same areal density and total thickness.
- failure mode /
- energy absorption mechanism /
- explosive welded plate /
- bonding interface

HTML全文

图 1 靶板结合界面体视显微形貌

Figure 1. Stereomicroscopic images of welded surface of target

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图 2 弹道实验装置

Figure 2. Ballistic experiment equipment

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图 3 球形破片

Figure 3. Spherical fragments

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图 4 双层钢/铝复合靶板的典型失效模式

Figure 4. Typical failure modes of two-layer steel/aluminum plates

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图 5 球形破片贯穿靶板数值模拟结果

Figure 5. Simulation of spherical projectile penetrating the target

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图 6 残余破片和塞块形貌

Figure 6. Deformed fragments and shearing plugs

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图 7 三层钢/铝/钢复合靶板的典型失效模式

Figure 7. Typical failure modes of three-layer steel/aluminum/steel plates

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图 8 单层钢板的典型失效模式

Figure 8. Typical failure modes of three-layer steel/aluminum/steel plates

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图 9 破片侵彻双层靶板初速与剩余速度关系

Figure 9. Relation between initial velocity and residual velocity

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图 10 破片侵彻双层靶板初速与剩余速度的关系

Figure 10. Relation between initial velocity and residual velocity

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表 1 靶板的组合方式

Table 1. Plate thickness and combination

n	靶板组合	h/mm			H/mm
n	靶板组合	Q235	LY12	Q235	H/mm
1	S5	5.0	-	-	5.0
2	S4Al2.9	4.0	2.9	-	6.9
2	S3Al5.8	3.0	5.8	-	8.8
2	S2Al8.7	2.0	8.7	-	10.7
3	S2Al2.9S2	2.0	2.9	2.0	6.9

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表 2 不同组合靶板弹道侵彻实验结果

Table 2. Experimental results for different targets in ballistic experiments

单位:m/s
靶板组合	第1发		第2发		第3发		第4发		第5发
靶板组合	v₀	v_r	v₀	v_r	v₀	v_r	v₀	v_r	v₀	v_r
S5	717.2	85.2	775.2	154.2	816.8	-	-	-	-	-
S4Al2.9	699.9	0	713.3	0	747.7	0	769.2	20.3	902.8	204.2
S3Al5.8	845.5	0	876.9	0	888.9	0	891.8	C	905.9	62.8
S2Al8.7	695.2	0	798.2	C	937.2	65.4	979.3	86.8	1 007	89.2
S2Al2.9S2	873.9	0	876.9	0	893.5	C	920.4	215	942.0	252.7
注:"C"表示靶板处在临界穿透状态, 破片的剩余速度为零。

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