基于热流固完全耦合分析的复合材料热压罐成形模具优化设计  

Mold Optimization Design of Composite Autoclave Forming Based on Thermal Fluid-Structure Interaction Coupling Optimization Analysis

作　　者：李顶河 贾磊 郭永刚 武耀罡[1] Li Dinghe;Jia Lei;Guo Yonggang;Wu Yaogang(Civil Aviation University of China,Tianjin 300300,China;China Special Vehicle Research Institute,Jingmen 448035,China)

机构地区：[1]中国民航大学,天津300300 [2]中国特种飞行器研究所,湖北荆门448035

出　　处：《航空科学技术》2024年第11期58-69,共12页Aeronautical Science & Technology

基　　金：国家自然科学基金(12072364)。

摘　　要：在复合材料层合结构热压罐固化过程中,由于温度场不均匀、模具约束、热膨胀系数不匹配和树脂固化收缩等因素的影响,复合材料工件会产生变形,模具与复合材料工件之间全耦合效应对工件固化变形结果的准确预测非常重要,是模型优化设计必须考虑的关键因素。本文建立了含模具热压罐固化过程的全耦合计算框架,包含固化动力学模型、热传导模型、流动压实模型、残余应力模型、热压罐热流场模型以及模具热传导模型,研究了曲面模具型面温度场不均匀分布对层合板脱模变形的影响,并利用该计算框架进一步建立了框架式模具的结构优化设计模型。通过研究,曲面模具和复合材料后端发生较大的变形,模具优化后,模具和复合材料的变形减小,优化模具对复合材料构件固化变形的优化有较好影响,为复合材料结构的固化成形工艺优化提供参考。During the curing process of composite laminated structure in autoclave,deformation may occur due to many factors,such as non-uniform temperature field,mold constraints,mismatched thermal expansion coefficients of composite materials,and resin curing shrinkage.The full coupling effect between mold and composite structure is very important for the accurate prediction of curing deformation.It is a key factor that must be considered in mold optimization design.A fully coupled model is established for the composite autoclave curing process,including curing kinetics model,heat conduction model,flow compaction model,residual stress,heat flow field of autoclave and mold.The influence of non-uniform temperature distribution of curved mold on the demolding deformation is investigated for the laminated plate,and a structural optimization design method is developed for the frame mold.According to the research,the significant deformation occurs at the rear end of the surface mold and the composite structures.Because of the mold optimization,the deformation of both the mold and composite is reduced.The optimization of the mold has a positive impact on curing deformation reduction of the composite component,providing valuable insights for optimizing the curing forming process of composite structures.

关 键 词：固化 复合材料层合板 热流固耦合 模具优化 

分 类 号：TB332[一般工业技术—材料科学与工程]