自由曲面构件的纤维铺放路径规划

Optimal Fiber Placement Paths for Free-Form Surface Parts

针对复合材料纤维铺放工艺及其设备控制的特点,提出了复合材料构件CAE/CAM一体化纤维铺放路径优化设计方法。通过对构件模型的有限元分析,获得构件的内部应力分布,根据主应力的大小和方向合理规划出若干基准纤维铺放路径;提出了基于等距线、等分点原理的两种算法,对基准铺放路径进行均匀密化,实现整个构件曲面的纤维铺放路径规划;讨论了铺丝宽度和铺放精度的控制策略,并给出了铺放头压辊中心控制轨迹,以满足纤维铺放机械手的控制需求。

For the control of fiber placement equipments, a method is used to produce optimal fiber placement paths for free-form surface composite parts based on CAE/CAM integration. By modeling the composite part with applied loads, the stress distribution of the part is investigated by finite element analysis with ANSYS. One or more optimal fiber placement baseline-paths can be produced, in which the tangential vector of each point matches its principal stress direction to increase the load-carrying capability of the part. Two algorithms are used to generate the rest fiber placement paths from the given fiber placement baseline-paths. The surface shaping errors resulted from placement path intervals are analyzed and a control strategy is suggested. The method is implemented based on the UG platform and an example is given.