柔性再生碳纤维湿法取向仿真模拟及其复合材料性能研究

doi:10.3901/JME.2023.07.389

机械工程学报 ›› 2023, Vol. 59 ›› Issue (7): 389-397.doi: 10.3901/JME.2023.07.389

• 资源化与再制造技术及装备 • 上一篇下一篇

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柔性再生碳纤维湿法取向仿真模拟及其复合材料性能研究

阚峻峰^1,2, 黄海鸿^1,2, 刘威豪^1,2, 刘志峰^1,2

1. 合肥工业大学机械工程学院合肥 230009;
2. 合肥工业大学机械工业绿色设计与制造重点实验室合肥 230009

收稿日期:2022-04-11 修回日期:2022-08-19 出版日期:2023-04-05 发布日期:2023-06-16
通讯作者: 黄海鸿(通信作者),男,1980年出生,博士,教授,博士研究生导师。主要研究方向为绿色制造、再制造与回收再资源化等。E-mail:huanghaihong@hfut.edu.cn
作者简介:阚峻峰,男,1996年出生。主要研究方向为碳纤维复合材料回收再利用。E-mail:kanjunfeng58@163.com
基金资助:
国家自然科学基金优秀青年基金(51722502)和国家自然科学基金面上(51775162)

Simulation of Flexible Recycled Carbon Fiber Wet Orientation and Its Composite Properties

KAN Junfeng^1,2, HUANG Haihong^1,2, LIU Weihao^1,2, LIU Zhifeng^1,2

1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009;
2. Key Laboratory of Green Design and Manufacturing of Mechanical Industry, Hefei University of Technology, Hefei 230009

Received:2022-04-11 Revised:2022-08-19 Online:2023-04-05 Published:2023-06-16

摘要/Abstract

摘要： 基于珠链模型，采用离散单元法对纤维模型进行柔性化处理；通过搭建EDEM-Fluent耦合仿真模型，对柔性再生碳纤维在渐缩流场中的流动取向过程进行仿真模拟。采用湿法取向技术对6 mm纤维进行重新取向排布制备取向毡，将仿真结果与实验结果进行对比。采用模压法制备了碳纤维/环氧树脂基复合材料，对其力学性能进行表征。结果表明：在纤维跟随流体运动的过程中，纤维会受到轴向剪切力的作用，发生不同程度的弯曲变形，并沿着流体流动方向发生旋转，从而在移动过程中完成取向。利用二维方向张量对纤维毡取向度进行表征，其取向度为98%；制备的取向复合材料弯曲强度和模量较未取向材料分别提升70.6%和88.5%。

关键词: 纤维取向, 柔性纤维, 离散单元法, 渐缩流场, 力学性能

Abstract: Based on the bead-chain model, the discrete element method is used to flexibly treat the fiber model. And the EDEM-Fluent coupling simulation model is built to simulate the flow orientation process of flexible recycled carbon fibers in the convergent flow field. Fibers with a length of 6 mm are reoriented and arranged by wet orientation technology to prepare oriented fiber felt, and the simulation results are compared with the experimental. Carbon fiber/epoxy resin fabricate specimens are prepared by compression moulding and their mechanical properties are characterized. Results show that in the process of the fibers following the fluid movement, the fiber is affected by axial shear force, resulting in varying degrees of bending deforming, and the direction also rotates along the direction of the fluid flow, and the orientation is completed during the movement. The preferential alignment degree of fiber felt is characterized by two-dimensional orientation tensor, which is 98%. The bending strength and modulus of the prepared oriented composites are increased by 70.6% and 88.5% compared to the unoriented composites.

Key words: fiber orientation, flexible fiber, discrete element method, convergent flow field, mechanical properties

中图分类号:

TB332

阚峻峰, 黄海鸿, 刘威豪, 刘志峰. 柔性再生碳纤维湿法取向仿真模拟及其复合材料性能研究[J]. 机械工程学报, 2023, 59(7): 389-397.

KAN Junfeng, HUANG Haihong, LIU Weihao, LIU Zhifeng. Simulation of Flexible Recycled Carbon Fiber Wet Orientation and Its Composite Properties[J]. Journal of Mechanical Engineering, 2023, 59(7): 389-397.

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柔性再生碳纤维湿法取向仿真模拟及其复合材料性能研究

Simulation of Flexible Recycled Carbon Fiber Wet Orientation and Its Composite Properties

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