多折角梯形台面折纸夹层结构的冲击防护性能

何远鹏; 王凌峰; 杨秋松; 李哲健; 郝洪; 陈文苏

doi:10.11883/bzycj-2023-0315

多折角梯形台面折纸夹层结构的冲击防护性能

doi: 10.11883/bzycj-2023-0315

何远鹏^{1, 2,},
王凌峰^{1, 2},
杨秋松^{1, 2},
李哲健^{1, 2, ,},
郝洪^{1, 2, 3},
陈文苏³

1.
广州大学工程抗震研究中心，广东广州 510006
2.
广东省地震工程与应用技术重点实验室，广东广州 510006
3.
科廷大学土木与机械工程学院基础设施监测与防护研究中心，澳大利亚，珀斯

基金项目: 国家自然科学基金（52208470）；广州市科技局项目（SL2022A04J01102）

详细信息

作者简介:
何远鹏（1997－　），男，硕士研究生，2112216035@e.gzhu.edu.cn

通讯作者:
李哲健（1992－　），男，博士，教授，zhejian.li@gzhu.edu.cn

中图分类号: O389
计量
- 文章访问数: 239
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- PDF下载量: 91
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-30
- 修回日期: 2023-10-18
- 网络出版日期: 2024-01-22
- 刊出日期: 2024-04-07

Impact response of TPS folded sandwich structure

HE Yuanpeng^{1, 2
,},
WANG Lingfeng^{1, 2},
YANG Qiusong^{1, 2},
LI Zhejian^{1, 2
, ,},
HAO Hong^{1, 2, 3},
CHEN Wensu³

1.
Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510006, Guangdong, China
2.
Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Key Laboratory of Earthquake Resistance, Earthquake Mitigation and Structural Safety, Ministry of Education, Guangzhou 510006, Guangdong, China
3.
Center for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Perth, Australia

摘要

摘要: 多折角梯形台面折纸（truncated square pyramid, TSP）作为新型折叠结构，具有良好的抗冲击、能量吸收特性并具有模块化易加工的特点。基于此结构模块化形成了单层以及多层夹层板，利用空气炮试验装置研究了背板无支撑的夹层结构以及覆层结构，在不同冲击工况、边界条件下结构的冲击防护性能以及吸能特性。通过测量、对比单层夹层结构的位移时程及冲击后的失效模式，对抗冲击性能进行了评估。利用装于背板的多点压力传感器装置，测量冲击作用下覆层结构对背板不同位置的传递力时程，研究不同工况下的缓冲性能。对于背板无支撑夹层工况，背板的残余位移随冲击速度的增大而增大。对于覆层工况，双层覆层有较好的能量吸收和抗冲击性能，相比于单层表现出更充分的芯层利用率。此外，冲击位置通过改变模块单元的变形模式对覆层结构动态响应产生显著影响，尤其影响传递力峰值和峰值出现时间。研究结果可为TSP防护结构的工程设计和应用提供参考。
- 折叠结构 /
- 覆层结构 /
- 空气炮冲击 /
- 动态响应 /
- 抗冲击性能
Abstract: As a novel folded structure, the truncated square pyramid (TSP) structure exhibits excellent impact resistance and energy absorption performance. It also has the merit of simple and modulated fabrication of its unit cell. To further verify the performance of TSP sandwich panels under local impact load, impact tests are carried out in this work by using an air cannon testing system. The unit cells are firstly prepared by multi-stage mold-pressing and then modular arranged to form single and multi-layer sandwich panels. The impact protection performance and energy absorption properties of the back-supported cladding cases and unsupported sandwich structures are investigated under different impact scenarios. Their impact resistance performances are evaluated by measuring and comparing the displacement time histories of the single-layer sandwich structures and their deformation modes after impact. For the back-supported cladding cases, a measuring system with five load cells is placed behind the back plate of the cladding and is rigidly supported to record the time history and distribution of the transmitted force of the claddings under impact. Their impact mitigation performances are evaluated by analyzing the recorded force-time histories under various loading scenarios. It is found that the maximum displacement and residual displacement of the back plate increase with the increase of impact velocity for the unsupported cases. For the rigidly supported claddings, the double-layered cladding shows significantly improved energy absorption and impact mitigation performance than the single-layered one. It shows a better utilization of the core, which leads to a reduced initial peak transmitted force. In addition, it is found that the impact position has a significant effect on the dynamic response of the claddings as it changes the peak transmitted force and its occurrence time because of the change in deformation modes. The research results provide a reference for the engineering design and application of TSP sandwich structures.
- folded structure /
- cladding structure /
- impact test /
- dynamic response /
- impact resistance

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图 1 TSP单元几何参数示意图

Figure 1. The TSP unit geometrical parameters

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图 2 螺丝固定边界

Figure 2. Bolt-constraint boundaries

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图 3 单层TSP结构试件及双层TSP结构试件

Figure 3. Single-layer-TSP and double-layer-TSP structural specimens

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图 4 两种材料真实应力-应变曲线

Figure 4. True stress-strain curves of two kind of materials

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图 5 不同边界条件下的试验台

Figure 5. Test rig with different boundary conditions

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图 6 弹丸冲击位置及传感器位置排布

Figure 6. Projectile impact locations and sensors arrangement

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图 7 椭球体弹头弹丸

Figure 7. Ellipsoidal-ended projectile

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图 8 单层TSP夹层结构试件背板中心位移

Figure 8. Displacement at the center of the back plate of single-layer TSP sandwich specimens

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图 9 TSP夹层结构试件在不同冲击速度下的变形

Figure 9. Deformation of TSP sandwich specimens under different impact velocities

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图 10 速度13.29、22.55 m/s的弹丸倾斜冲击试件

Figure 10. Inclined projectiles impacting specimens at 13.29 and 22.55 m/s

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图 11 冲击位置为L1时覆层结构试件的传递力时程曲线

Figure 11. Transmitted force- time histories for cladding specimens impacted at L1 position

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图 12 覆层结构背板冲击压痕

Figure 12. Impact indentation of the back plate of the cladding structure

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图 13 TSP双覆层结构试件被速度29.76 m/s弹丸冲击在外围产生振荡

Figure 13. Oscillation of the double-layer-TSP cladding specimen after 29.76 m/s impact

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图 14 相似冲击速度下TSP覆层结构试件与TSP双覆层结构试件的变形

Figure 14. Deformation of TSP cladding specimen and double-layer-TSP cladding specimen at similar impact velocities

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图 15 冲击位置为L1、L2和L3时的TSP双覆层结构试件的传递力时程曲线

Figure 15. Transmitted force-time history curves for double-layer-TSP cladding specimens at L1, L2 and L3 positions

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图 16 相近速度冲击L2与L3位置时TSP双覆层结构试件的变形

Figure 16. Deformation of double-layer-TSP cladding specimens under impact at L2 and L3 positions with similar velocities

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表 1 TSP结构单元尺寸理论参数

Table 1. Theoretical parameters of TSP structural cell size

a/mm	b/mm	H/mm	c/mm	l/mm	γ/（°）	β/（°）	α/（°）	x/mm
80	40	40	44.7	48.9	65.9	54.7	20.9	41.3

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表 2 铝板材料性能参数

Table 2. Material properties of Al1060 and Al5083

铝板类型	密度/ (kg·m⁻³)	杨氏模量/ GPa	厚度/ mm	屈服强度/ MPa	泊松比	抗拉强度/ MPa
5083铝板	2650	72	3	185	0.3	256
1060铝板	2700	69	0.47	126	0.3	142

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表 3 试件的不同冲击场景

Table 3. Impact scenarios for specimens

试验编号	试件	芯层层数	弹丸速度/（m·s⁻¹）	冲击位置	冲击能量/J
1	单层TSP（夹层试验）	1	13.29	L1	883
2	单层TSP（夹层试验）	1	17.30	L1	1497
3	单层TSP（夹层试验）	1	18.15	L1	1647
4	单层TSP（夹层试验）	1	22.55	L1	2542
5	单层TSP（覆层试验）	1	19.58	L1	1917
6	双层TSP（覆层试验）	2	21.88	L1	2394
7	双层TSP（覆层试验）	2	29.76	L1	4428
8	双层TSP（覆层试验）	2	24.80	L2	3075
9	双层TSP（覆层试验）	2	28.62	L3	4096

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