TiNi柱壳在不同约束下的横向冲击实验

张科; 唐志平

doi:10.11883/1001-1455-(2015)03-0296-08

TiNi柱壳在不同约束下的横向冲击实验

doi: 10.11883/1001-1455-(2015)03-0296-08

张科,
唐志平^,

中国科学技术大学中科院材料力学行为和设计重点实验室, 安徽合肥230027

基金项目: 国家自然科学基金项目(10872196)

详细信息

作者简介:
张科(1986—), 男, 博士研究生

通讯作者:
唐志平, zptang@ustc.edu.cn

中图分类号: O382
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- 被引次数: 0
出版历程
- 收稿日期: 2014-06-28
- 修回日期: 2015-01-20
- 刊出日期: 2015-05-25

Experimental study of TiNi tubes under radial impact with and without lateral constraint

Zhang Ke,
Tang Zhi-ping^,

Key Laboratory for Mechanical Behavior and Design of Materials, CAS, University of Science and Technology of China, Hefei 230027, Anhui, China

摘要

摘要: 为了解TiNi柱壳横向压缩力学性能以制造可重复使用抗冲吸能装置, 对有、无侧向约束的TiNi柱壳进行了横向冲击实验。利用改进的霍普金森压杆装置(SHPB), 配套波形分离方法, 实现了较长时间(~3 ms)的波形测量, 获得了TiNi柱壳在动态加载下的载荷压缩量曲线。通过高速摄影, 捕捉了柱壳的动态变形过程。结果表明, 无约束试件具有优良的可恢复变形能力, 承载力平台段特征明显。侧向约束的引入, 可以有效提高柱壳的承载力和耗能能力, 可以承受更高速度的冲击。选择合适的约束组合, 可望同时实现较大压缩行程和高耗能, 制造实用的抗冲吸能装置。
- 爆炸力学 /
- 横向冲击 /
- 抗冲吸能 /
- TiNi柱壳
Abstract: TiNi tubes with and without lateral constraint subjected to radial impact were investigated experimentally for the purpose of developing repeatedly used energy absorption devices.By using a modified SHPB apparatus and wave separation technique, the signal recorded was extended to about 3ms, and then the load-compression curves were available.With a high speed CCD camera, the dynamic deformation process of the specimens was captured.The results show that TiNi tubes without lateral constraint have an excellent recoverable deformability with apparent loading platform.The tubes with lateral constraint have a much better performance of energy dissipation and are able to withstand higher speed impact.If properly choosing the combination of two constraints, it may improve its dynamic performance both in the large deformation and high energy dissipation and will be used in the future shock absorbing devices.
- mechanics of explosion /
- radial impact /
- shock resistance and energy absorption /
- TiNi tubes

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图 1 实验装置简图

Figure 1. Schematic of experimental arrangement

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图 2 试件及约束

Figure 2. Specimen and lateral constraint

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图 3 透射杆示意图

Figure 3. Schematic of transmission bar

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图 4 波形处理实例

Figure 4. Example of waveform processing

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图 5 无侧向约束试件的载荷-压缩曲线

Figure 5. Load-compression curves without constraint

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图 6 ss-3的高速摄影照片

Figure 6. High speed CCD images of ss-3

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图 7 ss-4的力学响应结果

Figure 7. Mechanical response of ss-4

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图 8 ss-4高速摄影照片

Figure 8. High speed CCD images of ss-4

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图 9 有侧向约束试件的力学响应结果

Figure 9. Mechanical response of specimen with lateral constraint

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图 10 ff-3的高速摄影照片

Figure 10. High speed CCD images of ff-3

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图 11 无约束试件动静态实验结果比较

Figure 11. Comparsion of quasi-static and dynamic compression without lateral constraint

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图 12 有约束试件动静态实验结果比较

Figure 12. Comparsion of quasi-static and dynamic compression with lateral constraint

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图 13 不同约束下的抗冲吸能性能比较

Figure 13. Comparison of shock resistance and energy absorption features under various constraints

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表 1 实验参数和结果

Table 1. Experimental parameters and results under radial impact

No.	v₀/(m·s^-1)	δ_max/mm	δ_max/D	F_max/N	E₀/J	E_d/J	χ/(J·g^-1)	η/%
ss-1	3.17	1.59	0.199	287	0.347	0.038	0.58	10.9
ss-2	3.70	2.05	0.256	309	0.473	0.086	0.79	18.2
ss-3	4.69	2.91	0.364	368	0.759	0.162	1.26	21.3
ss-4	6.73	4.20	0.530	659	1.563	0.890	2.60	57.0
ff-1	3.83	1.08	0.135	748	0.506	0.124	0.84	24.5
ff-2	4.74	1.38	0.173	854	0.775	0.238	1.29	30.7
ff-3	5.28	1.50	0.188	1 037	0.962	0.338	1.60	35.1

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