自由曲面构件的纤维铺放路径规划

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。

Optimal Fiber Placement Paths for Free-Form Surface Parts

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.