含阻尼层夹芯复合材料充模工艺与仿真  

Mold filling process and simulation of sandwich composites with damping layer

作　　者：孙士勇[1] 张润东 王新玲 杨睿[1] SUN Shiyong;ZHANG Rundong;WANG Xinling;YANG Rui(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学机械工程学院,大连116024

出　　处：《复合材料学报》2023年第8期4471-4480,共10页Acta Materiae Compositae Sinica

基　　金：国家重点研发计划(2020YFB1506704-02);国家自然科学基金(51975085);中央高校基本科研业务费专项基金(DUT21GF405)。

摘　　要：在复合材料中引入黏弹性阻尼层是改善复合材料结构振动特性的有效方法。针对穿孔硅橡胶夹芯复合材料的真空辅助树脂传递工艺(VARTM)进行了实验与仿真分析。首先采用恒压注射条件分别测试了纤维增强材料及加入导流网后的等效渗透率。然后搭建了实验室VARTM观测平台进行了充模实验,同时基于RTM-Worx软件建立了树脂充模模型。通过对比实验与仿真的树脂流动状态图及不同时刻的填充面积,验证了仿真模型的有效性。最后,探究了阻尼层穿孔列间距、行距、直径及“边缘效应”等参数对树脂充模的时间及充模过程的影响。结果表明:仿真模型能够较好预测树脂流动情况,不合理的阻尼层参数会影响树脂的流动甚至导致缺陷的产生。Introducing viscoelastic damping layer into composites is an effective method to improve the composite structural vibration characteristics.The vacuum assisted resin transfer molding(VARTM) process of sandwich composites with perforated silicone rubber was investigated by experiment and simulation.Firstly,the equivalent permeability of fiber reinforced materials and its combination with the flow medium were tested under constant pressure injection conditions.Then,the VARTM platform was set up to observe mold filling experiment in the laboratory.The resin filling model was established based on the RTM-Worx software.The validity of the simulation model was verified by comparing the experimental resin flow diagram and the filling area with simulated results at different time.Finally,the effects of the parameters such as the spacing between columns,the row spacing,the diameter of the holes in the damping layer and the "edge effect" on the resin filling time and the filling process were discussed.The results show that the simulation model can better predict the resin flow behavior,and unreasonable parameters of damping layer can affect the resin flow and even lead to defects.

关 键 词：真空辅助树脂传递模塑 夹芯复合材料 充模过程 渗透率 边缘效应 

分 类 号：TB332[一般工业技术—材料科学与工程]