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针对热固性树脂基复合材料热压罐成型工艺过程,采用广义Maxwell(麦克斯韦)黏弹性本构模型建立了残余应力和固化变形的三维模型。模型考虑了复合材料固化过程中的热-化学效应、材料的热胀冷缩效应、基体树脂黏弹性效应以及材料的各向异性。通过与文献中实验结果的比较,证明了所建立的模型具有较高的可靠性。对复合材料C型制件的固化过程进行了数值模拟和实验对比,比对结果表明该数值模型具有较高的准确性。
Aiming at the thermocompression molding process of thermosetting resin matrix composites, a generalized Maxwell viscoelastic constitutive model was used to establish the three-dimensional model of residual stress and solidification deformation. The model takes into account the thermo-chemical effects during the curing of the composite, the thermal expansion and contraction of the material, the viscoelasticity of the matrix resin, and the anisotropy of the material. Compared with the experimental results in the literature, it is proved that the established model has high reliability. The curing process of composite C-parts is simulated and compared with the experimental results. The comparison results show that the numerical model has high accuracy.