非等温树脂传递模塑成型仿真建模及应用  

Simulation modeling and application of non-isothermal resin transfer molding

作　　者：赵亮 高胜晖 段跃新[2] ZHAO Liang;GAO Shenghui;DUAN Yuexin(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beihang University,Beijing 100191,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京航空航天大学,北京100191

出　　处：《航空材料学报》2023年第3期79-86,共8页Journal of Aeronautical Materials

摘　　要：树脂传递模塑成型(resin transfer molding, RTM)工艺是树脂基复合材料制造中主要的一种成型工艺,对该工艺的模拟仿真可在RTM制件的工艺设计优化方面起到关键作用。本工作以实际RTM工艺生产需求为基础,在二维等温RTM工艺仿真程序基础上,突破热流耦合计算等关键技术,采用控制体有限元(CV/FEM)方法,研发三维非等温RTM成型仿真模型。该仿真模型基于Darcy方程、连续性方程、能量守恒方程、固化反应方程以及多个流变固化模型,采用半离散方法和三收敛标准,可有效解决非等温RTM仿真过程的模具预热、树脂非等温充填过程的黏度变化、固化放热等仿真问题,经过平板实验件及机匣件应用验证,可有效预测RTM充填时间、速度及压力等关键结果,结果精度与国际同类产品相当,在核心仿真能力上达到了国外商业仿真模型的同等水平,基本具备了针对实际复杂结构零件开展仿真的能力。Resin transfer molding(RTM)process is a major molding process in the manufacture of resin-based composites,and the simulation of this process can play a key role in the process of optimization for the design of RTM parts.This paper independently developed a three-dimensional non-isothermal RTM simulation model based on the control volume/finite element method(CV/FEM)on the basis of two-dimensional isothermal RTM program.Based on the Darcy equation,the continuity equation,the energy conservation equation,the curing reaction equation and multiple rheological curing models,the simulation model adopts semi-discrete method and three convergence criteria to effectively solve the problems of mold preheating and resin non-isothermal in the non-isothermal RTM simulation process.For the simulation problems such as viscosity changing and curing heat release during the filling process,the simulation function has reached the level of similar international products.After the application verifications of the flat plate test piece and casing simulation,this simulation model can simulate filling time,velocity and pressure of RTM process that is the same as the products in the world.This simulation model basically has the ability of simulation for the actual complex structure parts.

关 键 词：RTM 模拟仿真 CV/FEM方法 固化反应 

分 类 号：TP317[自动化与计算机技术—计算机软件与理论]