Abstract：Aiming at the thermal overshoot and thermal shell-core effect during the curing of thick composite, a layered self-resistance electric heating (L–SRE) process design method is proposed to alleviate the thermal overshoot, reduce the through-thickness temperature difference, and shorten the curing time. In this paper, a multi-physical coupling finite element model (FEM) of L–SRE process is established to predict the degree of curing and the through-thickness temperature distribution under specific layering process parameters. Based on the FEM, a radial basis neural network surrogate model (RBF) is established. The genetic algorithm (GA) is used to optimize the peak temperature of thermal overshoot, the maximum through-thickness temperature difference, and the curing time during the whole process to obtain optimal parameters. Finally, the optimized multi-layer independent temperature control process parameters are obtained. Based on a multi-channel self-resistance electric heating (SRE) platform, L–SRE curing experiments are carried out. The experimental results show that the peak temperature of thermal overshoot using the new process is reduced to 132.8℃ below the glass transition temperature. Compared with the oven, the overshoot temperature is reduced by 19.7 ℃ , which is a 60.6% reduction; Compared with the integrated SRE and the recommended process of L-SRE, the overshoot temperature are reduced by 54.0% and 34.7% respectively. The curing time is reduced by nearly 33min, which is a 19.6% shorter. The optimized L–SRE process parameters can effectively reduce the thermal overshoot and improve the temperature uniformity through thickness.
张波，鲁泳，刘舒霆，刘强强，郝小忠. 大厚度复合材料分层自阻电热固化工艺设计研究[J]. 航空制造技术, 2021, 64(11): 58-68.
ZHANG Bo， LU Yong,LIU Shuting,LIU Qiangqiang,HAO Xiaozhong. Research on Process Design of Layered Self-Resistance Electric Heating for Thick Composite. Aeronautical Manufacturing Technology, 2021, 64(11): 58-68.
2021, 
