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针对复合材料制件在成型过程中的固化变形这一关键技术问题,通过在模具与复合材料制件之间引入剪切层的方法,建立了预测复合材料制件固化变形的解析计算模型和有限元仿真模型。剪切层的剪切模量用来衡量固化过程中模具与复合材料制件之间的相互作用,其数值大小通过与实验数据进行比对而得到。基于建立的固化变形模型,与文献中已有的实验结果进行了比较。结果表明:所建立的模型具有较高的可靠性。同时针对L型复合材料制件建立了三维有限元仿真模型,模型中除考虑材料各向异性和化学收缩效应以外,还将成型过程中模具与复合材料制件间的相互作用考虑在内。模拟结果表明:引入模具作用后L型零件的固化变形预测结果更加准确。
Aiming at the key technical problem of the solidification and deformation of the composite parts in the process of forming, a analytical model to predict the solidification deformation of the composite parts is established by introducing a shear layer between the mold and the composite parts. Metamodel simulation model. The shear modulus of the shear layer is used to measure the interaction between the mold and the composite part during solidification. The numerical value of the shear layer is obtained by comparison with the experimental data. Based on the established solidification deformation model, the experimental results in the literature are compared. The results show that the established model has high reliability. At the same time, a three-dimensional finite element simulation model was established for the L-shaped composite parts. In addition to considering the material anisotropy and chemical shrinkage effects, the model also takes into account the interaction between the mold and the composite parts during the forming process. The simulation results show that the prediction of the solidification deformation of the L-shaped parts after the introduction of the mold is more accurate.