VARTM工艺树脂固化过程温度场的模拟与实验

Simulation and Experiment of Resin Curing Procedure Temperature Field by VARTM

基于热传导和固化动力学理论,采用有限元法,建立了复合材料固化过程的物理模型和数学模型,采用fluent编制固化计算程序,模拟和分析了层合板固化过程中不同时刻的固化放热和温度分布情况,通过对比温度变化云图,获取相差最大部位的温差约为2.46℃。以R688型环氧树脂为基体、玻璃纤维布为增强材料使用真空辅助树脂传递模塑(VARTM)工艺固化成型中进行温度场的测量实验,通过温度记录仪采集预埋入纤维布中数点位置的热电偶的温度,记录复合材料在固化过程中不同位置和不同时刻的温度变化情况。研究表明:模拟和实验结果基本吻合,证明该方法的有效性和准确性。

Based on the thermal conduct and curing kinetics theory, the physical and mathematical model of composite materials curing process was built using the finite element method in this paper. The exothermic and temperature distribution at different moment during the curing of composite laminate plates were simulated and analyzed by writing curing calculation program to Fluent. It is obtained that the maximum temperature difference is 2.4 ℃ by contrasting the temperature distribution cloud. The experiment of monitoring curing temperature field by using the process of vacuum assisted resin transfer molding （VARTM） with R688 epoxy resin as substrate and glass fiber as strengthen material was performed. The temperature change in different time and different position of the composite materials were recorded by collecting the thermocouples embedded into the glass fiber to some of point by using the temperature recorder. The studies show that： simulation results are well agree with experimental results, which shows the method is effective and accurate.