面向复杂回转体的T700级碳纤维/双马树脂材料铺放适应性

为了研究面向复杂回转体的T700级碳纤维/双马树脂材料的铺放适应性，测试了3种T700级碳纤维/双马树脂材料的T型剥离强度及悬垂性，进行了曲率铺放性能对比研究，确定了最佳的T700级碳纤维/双马树脂材料。针对该材料，研究了不同工艺参数（铺放温度、铺放压力、铺放速度）在不同转向半径下对铺放质量的影响，并提出一种新的铺放质量评定方法。材料对比实验结果表明，在一定范围内，适当提高材料的刚性和层间黏结力对材料的铺放性能有明显改善，其中提高层间黏结力效果更加显著，并最终选用T700级碳纤维/双马树脂材料3作为复杂回转体的铺放材料。工艺优化实验发现，当铺放速度小于32 mm/s时，极限转向半径降低至1 000 mm。结合铺放效率，获得复杂回转体的最佳铺放工艺参数为F=800 N、T=40 ℃、v=32 mm/s，且在2 h内进行下层铺放，从而提高铺放质量及铺放效率，解决工程化应用问题。

Placement suitability of T700 carbon fiber/bismaleimide resin prepreg for complex rotary bodies in AFP

To study the placement suitability of T700 carbon fiber/bismaleimide resin prepreg for complex rotary bodies in Automated Fiber Placement (AFP), the T-type peel strength and drapability of three types of T700 carbon fiber/bismaleimide resin prepreg were tested, and the placement performances on the curvature were compared. In this paper, the effects of the processing parameters (lay-up temperature, lay-up velocity, and lay-up pressure) on the placement quality at different tow steering radii were investigated, and we proposed a new assessment method for placement quality. The comparison of material experiments exhibited that within limits, the placement quality improved significantly with the increase of the stiffness and interlaminar tack, which the latter is more significant. Finally, the T700 carbon fiber/bismaleimide resin prepreg 3 was selected as the placement material for the complex rotary bodies experiment. The process optimization experiment showed that the limit tow steering radius reduced to 1 000 mm,when the lay-up velocity was less than 32 mm/s. Combined with the placement efficiency, the optimal processing parameters for complex rotary bodies are F=800 N, T=40 ℃, v =32 mm/s, and the placement interval is 2 h. The proposed method improves the quality and efficiency of placement, successfully solving engineering application problems.