计及复合材料飞轮内孔卸载影响的多厚环套装的简化分析

纤维束张紧力缠绕的复合材料厚环固化成型以后,再抽出缠绕芯轴形成空心环,这一过程称为内孔卸载。本文作者在飞轮多环套装初应力分析和张紧力缠绕飞轮初应力分析的基础上,进一步给出了计及纤维束张紧力影响和复合材料厚环内孔卸载影响的多环过盈套装的简化分析,并给出了计算复合材料飞轮总体初应力场和变形场的公式。算例分析表明:内孔卸载后,纤维束缠绕的复合材料厚环的应力场和变形场均有明显的变化;和多厚环过盈套装的方法结合起来装配飞轮,可以有效地增大径向压应力,缓和环向应力;内孔卸载使得装配中的真实过盈量相对初始设定过盈量有较大的改变,必须充分考虑。 

SIMPLIFIED ANALYSES OF MULTI-RING PRESSFIT OF COMPOSITE FLYWHEEL FABRICATED BY TENSION WINDING CONSIDERING THE UNLOAD OF INNER HOLE

After the consolidation of the composite ring in tension winding, the mandrel is drawn out, and then a hollow ring is formed. The process is called unload of inner hole. Based on the analyses of a pressfit of multi-ring and tension winding of a composite flywheel, the simplified analyses of multi-ring pressfit of the composite flywheel is advanced, which adopts the influence of winding tension and unload of composite ring. Then the formula of stress and deformation is proposed. The result showed that the fields of stress and deformation changed evidently when the composite ring unloaded from the mandrel. The method of combination of the two ways can availably increase the radial compressive stress and smooth the hoop stress. The real interference caused by the unload of the rings had increased much relative to the initial appointed interference, which should be paid enough attention to.