1.南京航空航天大学机电学院，南京 211106;2.航天材料及工艺研究所，北京 100076
1.College of Mechanical and Electronic Engineering， Nanjing University of Aeronautics and Astronautics，Nanjing 210016;2.Aerospace Research Institute of Materials & Processing Technology，Beijing 100076
大型薄壁曲面复合材料零件多采用热压罐工艺成型，在固化过程以及脱模过程会产生变形，导致零件变形超差，部件装配困难。针对此问题，本文首先采用路径相关本构模型对其固化成型过程进行分析，然后进行热压罐成型试验验证理论分析结果，就此采用反向补偿法修正模具型面。仿真结果表明，某大型薄壁曲面复合材料零件成型后最大位移为11.121 mm，最小位移为0.171 mm，分别发生在对称轴方向短边的边角点和靠近对称轴方向短边的边角点；零件在变形较大的两侧边和短边处残余应力较大，与变形较小的长边相差7 MPa左右。仿真结果与试验结果吻合良好，固化变形平均误差为8.6%。使用补偿后的模具再次进行固化变形仿真，使该零件的最大固化变形降低了70.8%。
The large thin-wall curved surface composite parts are mostly formed by autoclave process，which will cause deformation in the curing process and demoulding process，resulting in deformation out-of-tolerance and assembly difficulty. In order to solve this problem， this paper firstly used the path-dependent constitutive model to analyze the curing process， then carried on the autoclave molding test to verify the theoretical analysis results， and finally used the reverse compensation method to correct the mold surface according to the theoretical analysis results. The simulation results show that the maximum displacement and minimum displacement of a large thin-wall surface composite parts after forming are 11.121mm and 0.171mm， respectively， which occur at the corner points of the short side and the corner points near the short side of the symmetry axis.The residual stress of the parts is larger on the two sides and the short side of the larger deformation， which is about 7MPa different from the long side of the smaller deformation. The simulation results are in good agreement with the experimental results， and the average curing deformation error is 8.6%. The maximum curing deformation of the part was reduced by 70.8% when the compensated mold was used for curing deformation simulation again.