连续纤维Octet-truss点阵夹芯结构制造及抗压缩性能

张甲瑞; 翟光涛; 李文礼

doi:10.13801/j.cnki.fhclxb.20201209.001

连续纤维Octet-truss点阵夹芯结构制造及抗压缩性能

doi: 10.13801/j.cnki.fhclxb.20201209.001

1.
重庆工商职业学院　智能制造与汽车学院，重庆 401520
2.
重庆理工大学　汽车零部件先进制造技术教育部重点实验室，重庆 400054

基金项目: 国家自然科学基金委青年项目(51805061)；重庆市教委科学技术研究项目(KJQN201804007)；重庆自然科学基金项目(cstc2020jcyj-msxmX0940)

详细信息

通讯作者:
李文礼，副教授，硕士生导师，研究方向为试验测试技术　E-mail：liwenli999@163.com

中图分类号: TB332；TB383.4
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出版历程
- 收稿日期: 2020-10-09
- 录用日期: 2020-11-25
- 网络出版日期: 2020-12-10
- 刊出日期: 2021-06-23

Fabrication and compression performance of continuous fiber Octet-truss lattice sandwich structure

ZHANG Jiarui^1
,,
ZHAI Guangtao^2
,,
LI Wenli^{2
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1.
Institute of Intelligent Manufacturing and Automotive of CQTBI, Chongqing 401520, China
2.
Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, China

摘要

摘要: Octet-truss是一种兼具轻质构型和多功能特点的三维点阵结构，为分析和验证其抗压缩性能，提出了一种采用连续纤维制备Octet-truss点阵夹芯板的方法，该方法设计了一套Octet-truss结构成型工装，采用该工装，运用空间编织法及树脂固化工艺制备了不同类型的玻璃纤维和凯夫拉纤维试件，并对试件进行了轴压测试，实验结果表明该方法制备的不同材质、不同尺寸的夹芯板力学性能稳定，验证了其制备工艺的可靠性，结合实验过程与SEM图像分析了玻璃纤维试件主要失效模式为节点附近纤维杆因纤维微屈曲出现断裂，凯夫拉纤维试件主要失效模式为纤维杆欧拉屈曲而出现弯曲破坏。
- Octet-truss /
- 点阵夹芯结构 /
- 制备工艺 /
- 成型工装 /
- 压缩性能
Abstract: Octet-truss is a three-dimensional lattice structure with light configuration and multi-function characteristics. In order to analyze and verify its compression resistance, a method of preparing Octet-truss lattice sandwich panel with continuous fiber was proposed. A set of Octet-truss structure molding tools was designed by this method. Different types of glass fiber and Kevlar fiber specimens were prepared by spatial weaving method and resin curing process, and the axial compression test was carried out. The experimental results show that the mechanical properties of different materials and different sizes of sandwich panels prepared by this method are stable, and the reliability of the preparation process is verified, Combined with the experimental process and electron microscope images, the main failure mode of glass fiber samples is fracture of the struts near the nodes induced by fiber microbuckling, while the Kevlar fiber samples failed by the Euler buckling of the struts.
- Octet-truss /
- lattice sandwich structure /
- preparation process /
- molding tool /
- compression performance

HTML全文

图 1 Octet-truss结构基本单元

Figure 1. Basic elements of Octet-truss structure

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图 2 Octet-truss点阵夹芯结构成型辅助工装

Figure 2. Auxiliary tooling of Octet-truss lattice sandwich structure

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图 3 水平杆编织

Figure 3. Horizontal bar weaving

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图 4 斜杆编织

Figure 4. Slanting bar weaving

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图 5 Octet-truss夹芯板

Figure 5. Octet-truss sandwich panel

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图 6 Octet-truss点阵夹芯结构1号、2号试件准静态压缩应力-应变曲线

Figure 6. Quasi-static stress-strain curves of Octet-truss lattice sandwich structure samples 1 and 2

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图 7 Octet-truss点阵夹芯结构K1号、K2号试件准静态压缩应力-应变曲线

Figure 7. Quasi-static stress-strain curves of Octet-truss lattice sandwich structure samples K1 and K2

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图 8 玻璃纤维Octet-truss点阵夹芯结构失效形式

Figure 8. Failure mode of a glass fiber composite sandwich structure with Octet-truss cores

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图 9 凯夫拉纤维Octet-truss点阵夹芯结构失效形式

Figure 9. Failure mode of a Kevlar fiber composite sandwich structure with Octet-truss cores

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图 10 玻璃纤维节点附近斜杆断裂SEM图像

Figure 10. SEM image of fracture of an inclined strut near glass fiber node

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图 11 凯夫拉纤维斜杆弯曲开裂SEM图像

Figure 11. SEM image of bending and cracking of a Kevlar fiber inclined strut

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表 1 Octet-truss点阵夹芯结构试件相关数据

Table 1. Octet-truss lattice sandwich structure specimen related data

Sample number	Strut length/mm	Average diameter/mm	Inclination angle/(°)	Raw material	Note
1	4	0.4	60	Glass fibre	-
2	4	0.4	60	Glass fibre	With panel
K1	8	0.68	60	Kevlar fiber	-
K2	8	0.68	60	Kevlar fiber	With panel

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