用于软材料的双子弹电磁驱动SHPB系统

谢倍欣; 汤立群; 姜锡权; 史景伦; 赵伟健; 佘瀚笙; 张泳柔; 刘逸平; 蒋震宇

doi:10.11883/bzycj-2017-0394

用于软材料的双子弹电磁驱动SHPB系统

doi: 10.11883/bzycj-2017-0394

1.
华南理工大学土木与交通学院亚热带建筑科学国家重点实验室，广东广州 510640
2.
陆军炮兵防空兵学院，安徽合肥 230031
3.
华南理工大学电子与信息学院，广东广州 510640

基金项目: 国家自然科学基金(11472109，11772134)；广东省自然科学基金(2015A030311046，2015B010131009)

详细信息

作者简介:
谢倍欣（1992－　），男，博士研究生，13mars@163.com

通讯作者:
汤立群（1966－　），男，博士，教授，lqtang@scut.edu.cn

中图分类号: O347.3
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- 被引次数: 0
出版历程
- 收稿日期: 2017-10-31
- 修回日期: 2018-01-04
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-05-01

A double-striker electromagnetic driving SHPB system for soft materials

1.
State Key Laboratory of Subtropical Building Science, School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China
2.
Army Artillery and Air Defense Force Academy, Hefei 230031, Anhui, China
3.
School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

摘要

摘要: 软材料的动态力学性能研究一直备受关注，目前分离式Hopkinson压杆(split Hopkinson pressure bar, SHPB)技术是其最重要的测试手段，然而在测试超软材料时实验装置设计方面仍存在许多有待改进之处。本文中研制了一套双子弹电磁驱动SHPB系统，使用聚碳酸酯作为杆件材料以克服软材料试件带来的诸多困难，引入了双子弹设计方案解决了电磁驱动方式难以应用于非铁磁材料的问题，并有效保证了子弹速度的准确控制。使用双子弹电磁驱动SHPB系统和传统金属SHPB装置同时对硅胶材料的动态力学性能进行了测试，实验结果的吻合性验证了本套系统的可靠性。应用双子弹电磁驱动SHPB系统开展了聚乙烯醇(polyvinyl alcohols, PVA)水凝胶这种超软材料在高应变率下的实验，成功表征出其动态力学性能。
- 分离式Hopkinson压杆(SHPB) /
- 电磁驱动 /
- 双子弹 /
- 软材料
Abstract: The dynamic mechanical properties of soft materials have attracted great attention, and the separated Hopkinson pressure bar (SHPB) technique is the most important test method at present. However, the SHPB technique still needs some improvements when it is applied to extra-soft materials. So, a double-striker electromagnetic driving SHPB system was developed. In the developed system, the bars were made of polycarbonate, and the double-striker scheme was designed to precisely control the velocities of the strikers. Both the aluminum SHPB facility and the double-striker electromagnetic driving SHPB system were employed to carry out dynamic experiments on the silicone, and the agreement between the test results by these two systems indicated the reliability of the innovative system. And dynamic mechanical properties of PVA hydrogels were successfully tested by the double-striker electromagnetic driving SHPB system.
- separated Hopkinson pressure bar /
- electromagnetic driving /
- double-striker /
- soft material

HTML全文

图 1 双子弹驱动装置示意图

Figure 1. Schematic diagram of the double-striker driving device

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图 2 电磁驱动装置原理图

Figure 2. Schematic diagram of the electromagnetic driving device

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图 3 电磁驱动装置

Figure 3. Electromagnetic driving device

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图 4 不同副子弹长度方案下子弹速度与充电电压的关系曲线

Figure 4. Relations between striker velocity and charging voltage at two different secondary striker lengths

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图 5 硅胶试件

Figure 5. Silicone specimen

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图 6 铝质SHPB系统

Figure 6. Aluminum SHPB system

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图 7 双子弹电磁驱动SHPB系统

Figure 7. Double-striker electromagnetic driving SHPB system

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图 8 两种不同SHPB系统的测试结果对比

Figure 8. Comparison of test results by two different SHPB systems

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图 9 PVA水凝胶试件

Figure 9. PVA hydrogel specimen

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图 10 典型的PVA水凝胶SHPB实验应变波形

Figure 10. Typical strain waves from an SHPB test of PVA hydrogel

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图 11 PVA水凝胶实验曲线

Figure 11. Experimental curves of a PVA hydrogel

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图 12 不应变率下PVA水凝胶的动态应力-应变曲线

Figure 12. Dynamic stress-strain curves of PVA hydrogels at different strain rates

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表 1 聚碳酸酯杆件的长度

Table 1. Lengths of polycarbonate bars

组号	子弹长度/mm	入射杆长度/mm	透射杆长度/mm
1	200	600	300
2	400	1 000	600

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表 2 子弹速度与充电电压的关系

Table 2. Relation between striker velocity and charging voltage

充电电压/V	长200 mm子弹的速度/(m·s⁻¹)	长400 mm子弹的速度/(m·s⁻¹)	充电电压/V	长200 mm子弹的速度/(m·s⁻¹)	长400 mm子弹的速度/(m·s⁻¹)
100	1.52±0.10	1.61±0.08	260	2.86±0.09	4.37±0.08
120	1.82±0.09	1.91±0.07	280	2.90±0.10	4.44±0.09
140	1.98±0.09	2.26±0.07	300	3.13±0.11	4.64±0.08
160	2.14±0.09	2.60±0.08	320	3.19±0.11	4.85±0.10
180	2.30±0.10	2.97±0.08	340	3.28±0.10	5.07±0.09
200	2.46±0.10	3.35±0.07	360	3.32±0.11	5.28±0.09
220	2.55±0.09	3.98±0.07	380	3.52±0.12	5.57±0.10
240	2.67±0.09	4.17±0.08

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