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

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);陶勇(1990—)，男，副教授，博士(通讯作者. E-mail: tao-yong@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: 11
- HTML全文浏览量: 2
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-11-12
- 修回日期: 2024-12-19
- 网络出版日期: 2025-12-05

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

Funds:

The National Science Foundation of China(1247022172)

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

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