论文部分内容阅读
研究了激光切割碳纤维复合材料(CFRP)过程中碳纤维的铺设方向和树脂含量对激光能量传递方向以及切割质量的影响。根据复合材料混合定律设定材料物理参数,建立了碳纤维铺设角度为0°、45°、90°,树脂含量由30%增至50%的单层CFRP三维有限元模型。数值模拟结果表明,激光多向切割单层CFRP时,烧蚀前沿的能量传递方向由激光切割方向主导;随着纤维铺设角度的增大,传递方向的角度增大;稳定切割时能量传递主要沿纤维铺设方向。随着纤维铺设角度的增大,切缝倾角增大,表面碳纤维烧蚀宽度几乎不变,温度场变宽,最高温度降低。切割不同树脂含量单层CFRP时,热影响区宽度和最高温度随树脂含量的增加都呈近似线性变化。与试验结果相比,数值模拟结果中的表面碳纤维被烧蚀宽度的平均误差为10.66%,热影响区宽度的平均误差为13.09%。
The influence of the orientation of carbon fibers and the resin content on the laser energy transfer direction and the cutting quality during laser cutting carbon fiber composite (CFRP) process was studied. According to the mixing law of composite materials, the three-dimensional finite element model of single-layer CFRP was set up with 0 °, 45 °, 90 ° carbon fiber lay-up and the resin content increased from 30% to 50%. The numerical simulation results show that the energy transfer direction of the ablation front is dominated by the laser cutting direction when the laser multi-directional cutting single-layer CFRP is used. With the increase of the fiber laying angle, the angle of the transmission direction increases. The main energy transfer along the cutting edge Fiber laying direction. As the fiber laying angle increases, the incline angle increases, the surface carbon fiber ablation width almost unchanged, the temperature field broadening, the maximum temperature decreases. When cutting single-layer CFRP with different resin content, the width of the heat-affected zone and the maximum temperature showed an approximately linear change with the increase of the resin content. Compared with the experimental results, the average error of the ablation width of the surface carbon fibers in the numerical simulation results is 10.66%, and the average error of the width of the heat affected zone is 13.09%.