复合材料整体异形构件的CAD技术研究

对于多分支整体异形空心薄壁断面复合材料支架这种整体异形构件,由于复杂的空间曲面构形和纤维铺设连续性要求成为其CAD技术难题.为此,采用分块建模和网格细化技术以控制曲面走向,生成等距网格,解决了有限元网格划分难题,利用试验及有限元软件完成了改变层压板铺层方向及顺序,对异形构件进行了力学性能分析和构件的优化设计.经验证及产品质量检测,缝纫预形件树脂转移成形整体异形赛车架达到了设计要求,证明上述方法的可行性,可供航空航天及民用产品同类构件设计参考. 

Investigation on CAD of Composite Materials Entire-Body Special-Shaped Component

For entire body special shaped component such as multi branch entire body special shaped hollow composite material tressel, the complex curved surface construction and continuity in laying fiber become obstacle in CAD. So block modeling and grid refining are used to control the direction of the surface and generate equal space grids. As a result, it is easier to generate the grids.The order and direction of the board layer are changed, the mechanical properties is analyzed and the design of component is optimized by means of testing and simulating with finite element software. The entire body special shaped racing bicycle,shaped by pouring resin into sewing exemplar, is proved to be acceptable after experiment and checking.This means that the method is practicable and can be used to design components of either aerostat and space craft or civil product.