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针对复合材料T型整体化结构固化成型的工艺过程,分析了结构经固化而导致翘曲变形的原因;建立了整体化结构翘曲变形预测的理论模型及分析方法;运用有限单元法计算了T型结构件的内部温度和固化度的分布,以及由于内部化学反应放热、固化引起的体积收缩和材料各个方向热膨胀系数的不一致而导致的结构翘曲变形量,同时考虑了树脂在固化过程中材料参数随着固化度的变化而变化;并研究了翘曲变形与T型结构件尺寸之间的关系。研究表明,选择合适的角材高度、宽度以及倒角半径可以有效地降低结构的翘曲变形。
Aiming at the process of solidification molding of composite T-shaped integral structure, the cause of warp deformation caused by solidification of the structure is analyzed. The theoretical model and analysis method of warpage deformation prediction of integrated structure are established. The finite element method The distribution of the internal temperature and the degree of curing of the structural member, and the amount of structural warpage caused by the internal chemical reaction exotherms, the volume shrinkage due to solidification and the inconsistency of the thermal expansion coefficient in all directions of the material, taking into account the resin during the curing process The material parameters change with the curing degree. The relationship between warpage and the size of T-shaped structure is also studied. The research shows that choosing appropriate height, width and chamfer radius can effectively reduce the warpage of the structure.