新型梯度多级六边形蜂窝面内耐撞性研究

周德; 赵若朝; 陶勇

doi:10.21656/1000-0887.450306

新型梯度多级六边形蜂窝面内耐撞性研究

doi: 10.21656/1000-0887.450306

周德^{1, 2,},
赵若朝³,
陶勇^1, ,

1.
中南大学土木工程学院，长沙 410083
2.
湖南铁院土木工程检测有限公司，长沙 410004
3.
中南大学交通运输工程学院，长沙 410083

(我刊青年编委陶勇来稿)

基金项目:

国家自然科学基金 1247022172

详细信息

作者简介:
周德(1980—)，男，副教授，博士(E-mail: 210026@csu.edu.cn)

通讯作者:
陶勇(1990—)，男，副教授，博士(通讯作者. E-mail: tao-yong@csu.edu.cn)

中图分类号: O34
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- 文章访问数: 99
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- 被引次数: 0
出版历程
- 收稿日期: 2024-11-12
- 修回日期: 2024-12-19
- 刊出日期: 2025-11-01

In-Plane Crashworthiness of Graded Hierarchical Hexagonal Honeycombs

ZHOU De^{1, 2
,},
ZHAO Ruochao³,
TAO Yong^{1
, ,}

1.
School of Civil Engineering, Central South University, Changsha 410083, P.R.China
2.
Hunan Tieyuan Civil Engineering Testing Co., Ltd., Changsha 410004, P.R.China
3.
School of Traffic & Transportation Engineering, Central South University, Changsha 410083, P.R.China

(Contributed by TAO Yong, M.AMM Youth Editorial Board)

摘要

摘要: 梯度设计和多级设计在提高蜂窝材料的力学和吸能性能方面各有优势. 受天然蜂窝的启发，该文基于梯度蜂窝材料和多级蜂窝材料，结合变壁厚梯度设计和节点型多级设计的概念，提出了一种新型梯度多级六边形蜂窝材料. 利用增材制造技术制备了梯度多级六边形蜂窝试件，并通过试验和数值模拟研究了新型梯度多级六边形蜂窝的面内耐撞性，分析对比了梯度设计和多级设计对梯度多级六边形蜂窝面内耐撞性的影响规律. 研究结果表明，结合梯度设计和多级设计可以显著增强蜂窝材料的面内耐撞性，且会出现明显的负Poisson比现象. 此外，相比于多级设计，梯度设计对蜂窝材料的力学和吸能性能的增强效果更加显著.
- 梯度多级蜂窝 /
- 面内 /
- 耐撞性 /
- 增材制造
Abstract: Gradient and hierarchical designs have their own advantages in improving the mechanical and energy-absorption properties of honeycombs. Inspired by natural honeycomb, a novel gradient hierarchical hexagonal honeycomb (GHHH) was proposed based on gradient honeycombs and hierarchical honeycombs, to combine the concepts of gradient design with variable wall thicknesses and vertex hierarchical design. The GHHH specimens were fabricated with the additive manufacturing technology. The in-plane crashworthiness of the novel GHHH was investigated through experiments and numerical simulations, and the effects of gradient design and hierarchical design on the in-plane crashworthiness of GHHH were analyzed and compared. The results show that, the combination of gradient design and hierarchical design can significantly increase the in-plane crashworthiness of honeycomb materials, and a significant negative Poisson's ratio phenomenon will occur. In addition, the gradient design is more effective in enhancing the mechanical and energy absorption properties of the honeycomb materials than the hierarchical design.
- graded hierarchical honeycomb /
- in-plane /
- crashworthiness /
- additive manufacturing
edited-by

edited-by
注释:

1) (我刊青年编委陶勇来稿)

HTML全文

图 1 GHHH的构造过程

Figure 1. The construction process of the GHHH

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图 2 梯度多级六边形蜂窝3D打印试件

Figure 2. The 3D printed GHHH specimen

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图 3 准静态拉伸试验条件

Figure 3. Quasi-static tensile test conditions

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图 4 梯度多级六边形蜂窝准静态压缩试验装置

Figure 4. The quasi-static compressive test setup for the GHHH

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图 5 有限元模型

Figure 5. The finite element model

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图 6 试验与仿真结果的应力-应变曲线比较

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 6. Comparison of stress-strain curves between experimental and numerical results

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图 7 具有不同参数的梯度多级六边形蜂窝的应力-应变曲线

Figure 7. Representative stress-strain curves of the GHHH with different parameters

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图 8 λ=0.3和k=0.3的梯度多级六边形蜂窝的变形模式

Figure 8. Deformation modes of the GHHH with λ=0.3 and k=0.3

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图 9 λ=0.5和k=0.6的梯度多级六边形蜂窝的变形模式

Figure 9. Deformation modes of the GHHH with λ=0.5 and k=0.6

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图 10 梯度多级六边形蜂窝的变形模式分类

Figure 10. The deformation modes diagram of the GHHH

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图 11 梯度多级六边形蜂窝的平台应力和比吸能随梯度参数的变化

Figure 11. The plateau stress and SEA of the GHHH vs. the gradient parameter

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图 12 具有不同梯度参数的梯度多级六边形蜂窝的Poisson比随应变的变化

Figure 12. Variations of Poisson's ratio with the strain for GHHHs with different gradient parameters

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图 13 梯度多级六边形蜂窝的平台应力和比吸能随多级参数的变化

Figure 13. The plateau stress and SEA of the GHHH vs. hierarchical parameters

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图 14 具有不同多级参数的梯度多级六边形蜂窝的Poisson比随应变的变化

Figure 14. Variations of Poisson's ratio with the strain for GHHHs with different hierarchical parameters

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图 15 负Poisson比的出现与梯度参数和多级参数的关系

Figure 15. The relationship between the appearance of negative Poisson's ratio and the gradient parameter and the hierarchical parameter

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图 16 梯度六边形蜂窝的平台应力和比吸能随梯度参数的变化

Figure 16. The plateau stress and SEA of the GHH vs. the gradient parameter

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图 17 具有不同梯度参数的梯度六边形蜂窝的Poisson比随应变的变化

Figure 17. Variations of Poisson's ratio with the strain for GHHs with different gradient parameters

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图 18 节点型多级六边形蜂窝的平台应力和比吸能随多级参数的变化

Figure 18. The plateau stress and SEA of the VHHH vs. the hierarchical parameter

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图 19 具有不同多级参数的节点型多级六边形蜂窝的Poisson比随应变的变化

Figure 19. Variations of Poisson's ratio with the strain for VHHHs with different hierarchical parameters

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图 20 不同构型蜂窝的平台应力和比吸能对比

Figure 20. Comparison of plateau stresses and SEAs of honeycombs with different configurations

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图 21 不同构型蜂窝的Poisson比对比

Figure 21. Comparison of Poisson's ratios of honeycombs with different configurations

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表 1 GHHH试件的几何参数

Table 1. The detailed parameters of the GHHH specimens

L₁ t_eq λ k ρ

12 mm 0.8 mm 2/3 0.5 0.128 3

下载: 导出CSV

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