基于VARTM的碳纤维单向与三维编织混杂织物树脂灌注工艺  

Resin infusion process for carbon fiber unidirectional and three-dimensional woven hybrid fabrics based on VARTM

作　　者：户迎灿 张联合 崔健 谢金路 王晓明 任浩 张健榜 查一斌 秦成 张辉[2] 倪宇峰 HU Yingcan;ZHANG Lianhe;CUI Jian;XIE Jinlu;WANG Xiaoming;REN Hao;ZHANG Jianbang;ZHA Yibin;QIN Cheng;ZHANG Hui;NI Yufeng(CRRC QINGDAO SIFANG Co.,Ltd.,Qingdao 266111,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;College of Mechanical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620 [3]东华大学机械工程学院,上海201620

出　　处：《工程塑料应用》2024年第2期57-65,共9页Engineering Plastics Application

基　　金：国家重点研发计划项目(2022YFB3704500);山东省重点研发计划项目(2021ZDPT02)。

摘　　要：为探究碳纤维单向与三维编织混杂增强环氧树脂基复合材料地铁转向架侧梁的树脂灌注成型工艺,首先基于渗透率理论模型采用非饱和径向流法分别测试得到碳纤维单向与三维编织织物的渗透率。通过数值模拟的方法对典型复合材料方形管结构进行缩比建模与网格划分,并利用PAM-RTM软件对树脂灌注成型过程进行仿真分析,预测了制备复合材料方管所需的灌注时间、灌注压力以及树脂流动过程缺陷的产生。最后根据模拟的灌注方案通过真空辅助树脂传递模塑(VARTM)成型工艺制备了碳纤维单向和三维编织混杂织物增强环氧树脂复合材料方管结构件。结果表明,通过PAM-RTM模拟VARTM工艺制备复合材料方管时树脂的流动,预测得到灌注时间为3897 s,VARTM工艺实际制备复合材料方管的灌注时间为4052 s,误差约为3.8%,在合理误差范围内。方管内部灌注压力随着与注胶口距离的增加而逐渐减小。模拟与实验的误差可能是由于实际铺层和灌注过程中树脂流动引起织物的剪切变形以及真空度的差异导致渗透性能产生变化。仿真模拟和实际制备复合材料方管均无明显缺陷产生,证明径向法织物渗透率的理论模型计算测试和仿真结果具有可靠性。To investigate the resin infusion process of carbon fiber unidirectional and three-dimensional woven hybrid reinforced epoxy resin based composites for subway bogie side beams,the permeability of carbon fiber unidirectional and threedimensional woven fabrics were first tested using the unsaturated radial flow method based on the permeability theory model.By using numerical simulation methods,the typical composite square tube structure was scaled modeling and meshed,and the resin infusion process was simulated and analyzed by using PAM-RTM software.The required infusion time,infusion pressure,and the generation of resin flow defects for preparing composite square tubes were predicted.Finally,a carbon fiber unidirectional and threedimensional woven hybrid fabric reinforced epoxy resin composite square tube structure part was prepared using vacuum assisted resin transfer molding(VARTM)technology based on the simulated infusion scheme.The results show that,through the PAM-RTM simulation of the resin flow during the preparation of the composite square tube with VARTM process,the predicted infusion time is 3897 s,while the actual infusion time for the composite square tube prepared by the VARTM process is 4052 s,with an error of approximately 3.8%,within a reasonable error range.The infusion pressure inside the square tube gradually decreases as the distance from the infusion port increases.The error between simulation and experiment may be due to the shear deformation of the fabric caused by resin flow during the actual laying and infusion process and the difference in vacuum degree,resulting in changes in permeability.Both simulation and actual preparation of the composite square tubes show no obvious defects,proving the reliability of the theoretical model calculation,testing,and simulation results for radial fabric permeability.

关 键 词：碳纤维复合材料 真空辅助树脂传递模塑成型 混杂织物 树脂流动模拟 

分 类 号：TB332[一般工业技术—材料科学与工程]