孔槽泡沫夹芯复合材料真空辅助树脂传递工艺仿真与优化  

Optimization and Simulation of Vacuum Assisted Resin Infusion Process for Perforated and Grooved Foam Sandwich Composite

作　　者：杨张韬 倪爱清[2] 王继辉[1] 冯雨薇 YANG Zhangtao;NI Aiqing;WANG Jihui;FENG Yuwei(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《材料导报》2024年第2期249-257,共9页Materials Reports

摘　　要：本工作提出了孔槽泡沫夹芯复合材料的设计方案并针对真空辅助树脂传递(VARI)工艺进行了实验和仿真研究。首先,通过实验测得玻璃纤维织物和树脂的相关参数,利用Hagen-Poiseuill方程和达西定律算出孔洞和沟槽的等效渗透率;接着,利用PAM-RTM模拟孔槽泡沫夹芯复合材料的VARI工艺过程,并与实验结果进行对比;然后,使用PAM-RTM研究了芯材加工参数、树脂灌注方式和导流网铺敷区域对成型过程的影响,并选出了最优方案;最后,在此方案的基础上研究了树脂黏度与灌注时间的关系,并拟合得到了预测函数。结果表明:实验结果与仿真结果基本一致;最优灌注方案可显著缩短树脂填充时间并降低整体孔隙率;预测函数可准确预测灌注时间,对实际生产具有一定的指导意义。The design of perforated and grooved foam sandwich composites was proposed here and the processing technique of vacuum assisted resin infusion(VARI)used was investigated experimentally and numerically.Firstly,the related parameters of glass fiber fabric and resin were measured experimentally.The Hagen-Poiseuill equation and Darcy’s law were used to calculate the equivalent permeabilities of the holes and grooves.Then,the VARI processing of perforated and grooved foam sandwich composites was simulated by PAM-RTM and compared with experimental results.Afterwards,PAM-RTM was applied to study the influence of the parameter of core processing,the perfusion scheme of resin and the location of distribution medium on the molding process,and the optimal scheme was obtained.Finally,by investigating this scheme,the relationship between resin viscosity and perfusion time was studied,and the prediction function was obtained by fitting.The results show that good agreement was achieved between the experiment and simulation.The optimal perfusion scheme can significantly shorten the filling time of resin and reduce the overall porosity.The perfusion time can be accurately predicted by prediction function,which serves as significant guidance for practical production.

关 键 词：夹芯复合材料 等效渗透率 真空辅助树脂传递 芯材加工 工艺优化 孔隙率 

分 类 号：TB332[一般工业技术—材料科学与工程]