连续纤维增强复合材料变刚度结构3D打印与性能研究

doi:10.3901/JME.2022.05.170

机械工程学报 ›› 2022, Vol. 58 ›› Issue (5): 170-177.doi: 10.3901/JME.2022.05.170

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连续纤维增强复合材料变刚度结构3D打印与性能研究

侯章浩^1,2, 田小永², 朱伟军^2,3, 兰红波¹, 李涤尘²

1. 青岛理工大学山东省增材制造工程技术研究中心青岛 266520;
2. 西安交通大学机械制造系统工程国家重点实验室西安 710049;
3. 北京航空航天大学机械工程及自动化学院北京 100083

收稿日期:2021-08-18 修回日期:2021-10-08 出版日期:2022-03-05 发布日期:2022-04-28
通讯作者: 田小永(通信作者),男,1981年出生,博士,教授,博士研究生导师。主要研究方向为多材料、复合材料3D打印技术及其应用。E-mail:leoxyt@mail.xjtu.edu.cn E-mail:leoxyt@mail.xjtu.edu.cn
作者简介:侯章浩,男,1988年出生,博士,副教授,硕士研究生导师。主要研究方向为纤维增强复合材料设计与3D打印。E-mail:houzhhao@163.com
基金资助:
国家自然科学基金(52075422);王宽诚教育基金会资助项目。

3D Printing and Performance of Continuous Fiber Reinforced Variable Stiffness Composite Structures

HOU Zhang-hao^1,2, TIAN Xiao-yong², ZHU Wei-jun^2,3, LAN Hong-bo¹, LI Di-chen²

1. Shandong Engineering Research Center for Additive Manufacturing, Qingdao University of Technology, Qingdao 266520;
2. State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an 710049;
3. School of Mechanical Engineering and Automation, Beihang University, Beijing 100083

Received:2021-08-18 Revised:2021-10-08 Online:2022-03-05 Published:2022-04-28

摘要/Abstract

摘要： 连续纤维增强复合材料变刚度结构可以通过调控纤维含量和方向分布以最大化利用纤维的性能优势。然而现有制造工艺难以实现纤维含量的精确调控,基于连续纤维增强复合材料3D打印工艺,建立了工艺参数与纤维含量的映射关系,通过动态调控打印过程中纤维与树脂的进给比例,实现了连续纤维增强复合材料变刚度结构的一体化无模快速制造。系统研究了纤维含量变刚度分布对制件弯曲与冲击性能的影响,在相同平均纤维含量下,3D打印变刚度结构的抗弯模量与冲击强度分别比均质结构提高了70%和65%。通过建立3D打印连续纤维增强复合材料变刚度结构的本构及有限元分析模型对其失效行为进行了分析,结果表明将较高纤维含量设置在制件的背侧,可以增加制件对纤维拉伸破坏的抵抗能力,大大提高制件的承载能力和纤维的使用效率。研究为航天航空、轨道交通等领域复合材料的设计制造提供了新的思路。

关键词: 3D打印, 变刚度, 连续纤维, 复合材料

Abstract: Continuous fiber reinforced variable stiffness composite structures can adjust fiber content and direction distribution to maximize fiber performance advantages. However, the existing manufacturing process is difficult to precisely control the fiber content.The mapping relationship between process parameters and fiber content is established based on 3D printing of the continuous fiber reinforced composites. The integrated manufacturing of continuous fiber reinforced variable stiffness composite structures is achieved by dynamically adjusting the feed ratio of resin during the 3D printing process. The influence of the variable stiffness distribution of fiber content on the bending and impact properties of the part is systematically studied. The flexural modulus and impact strength of the 3D printed variable stiffness structures are respectively 70% and 65% higher than that of the homogeneous structures under the same average fiber content. The failure behavior of 3D printed continuous fiber reinforced variable stiffness composite structures is analyzed by constitutive models of 3D printed composites with different fiber content. The results show that the resistance of the part to fiber tensile damage will increase by setting a higher fiber content on the back side of the part, and the load-bearing capacity of the part and the use efficiency of the fiber will be greatly improved. The research in this paper provides new ideas for the design and manufacture of composite materials in the aerospace, rail transit and other fields.

Key words: 3D printing, variable stiffness, continuous fiber, composites

中图分类号:

TH16
TB33

侯章浩, 田小永, 朱伟军, 兰红波, 李涤尘. 连续纤维增强复合材料变刚度结构3D打印与性能研究[J]. 机械工程学报, 2022, 58(5): 170-177.

HOU Zhang-hao, TIAN Xiao-yong, ZHU Wei-jun, LAN Hong-bo, LI Di-chen. 3D Printing and Performance of Continuous Fiber Reinforced Variable Stiffness Composite Structures[J]. Journal of Mechanical Engineering, 2022, 58(5): 170-177.

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连续纤维增强复合材料变刚度结构3D打印与性能研究

3D Printing and Performance of Continuous Fiber Reinforced Variable Stiffness Composite Structures

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