基于主应力轨迹线的连续碳纤维复合材料3D打印路径规划方法

Path planning method for continuous carbon fiber composites 3D printing based on principal stress trajectory lines

连续碳纤维复合材料3D打印成型零件的力学性能对纤维的铺设方向有需求,传统的路径规划方法基于零件的形状轮廓进行填充,不能满足零件的实际使用性能。针对这一问题,提出基于主应力轨迹线的连续碳纤维复合材料3D打印路径规划方法。基于连续碳纤维复合材料三维模型的有限元分析数据,通过材料力学计算得到相应的主应力轨迹线;通过连续碳纤维复合材料3D打印的打印参数对得到的主应力轨迹线进行调控,保证每一条轨迹线之间的间距契合3D打印要求;通过坐标变换调整有限元分析坐标系以及打印机坐标系;通过以上调控生成用于连续碳纤维复合材料3D打印的G code规划文件。通过路径规划仿真对比和打印拉伸实验,基于主应力轨迹线生成的连续碳纤维复合材料3D打印路径比传统直线碳纤维复合材料3D打印路径性能提高了4.5%,验证了基于主应力轨迹线的连续碳纤维复合材料3D打印路径规划方法的有效性。

The performance of continuous carbon fiber composite 3D printed parts has a demand for fiber laying direction,and the traditional path planning method is filled based on the shape profile of the part,which can not meet the actual performance of the part.To solve this problem,a path planning method for continuous carbon fiber composite 3D printing based on principal stress trajectory lines was proposed.Based on the finite element analysis data of the continuous carbon fiber composite 3D model,the corresponding principal stress trajectory lines were calculated by material mechanics.Through the printing parameters of continu-ous carbon fiber composite material 3D printing,the obtained principal stress trajectories were regulated to ensure that the spacing between each trajectory lines met the requirements of 3D printing.The finite element analysis coordinate system and printer coor-dinate system were adjusted by coordinate transformation.The G code planning file for continuous carbon fiber composite 3D printing was generated through the above regulation.Through path planning simulation comparison and print tensile test,the per-formance of the continuous carbon fiber print path generated based on the principal stress trajectory line was improved by 4.5%compared with the traditional straight path,which verifies the effectiveness of the path planning method for continuous carbon fiber composite 3D printing based on the principal stress trajectory line.