3D打印连续纤维增强尼龙复合材料冲击性能  

Impact Resistance of 3D Printed Continuous Fiber Reinforced Composite Materials

作　　者：谈丽姿 聂祥樊[3] 罗楚养 胡晓安 蔺诗韵 於琳涛 Tan Lizi;Nie Xiangfan;Luo Chuyang;Hu Xiaoan;Lin Shiyun;Yu Lintao(School of Aeronautics,Chongqing Jiaotong University,Chongqing 400074,China;The Green Aerotechnics Research Institute of Chongqing Jiaotong University,Chongqing 401120,China;National Key Lab of Aerospace Power System and Plasma Technology,Air Force Engineering University,Xi´an 710038,China;Donghua University,Collaborative Innovation Center for Civil Aviation Composites,Shanghai 201620,China;School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]重庆交通大学航空学院,重庆400074 [2]重庆交通大学绿色航空技术研究院,重庆401120 [3]空军工程大学航空动力系统与等离子体技术全国重点实验室,西安710038 [4]东华大学民用航空复合材料协同创新中心,上海201620 [5]南昌航空大学飞行器工程学院,南昌330063

出　　处：《工程塑料应用》2023年第12期64-71,共8页Engineering Plastics Application

基　　金：装备预研重点实验室基金项目(614220220200207,614220220200208)。

摘　　要：连续纤维增强热塑性复合材料中增强相纤维起承载作用,增强相在打印层内部的填充状态及层间的分布位置会对产品的力学性能产生重要影响。为探究不同纤维状态下增材制造件的抗冲击能力,采用熔融沉积工艺制备纤维增强热塑性复合材料,并对复合材料进行冲击性能测试,对断裂表面的扫描电子显微镜图进行分析,深入研究了熔融沉积成型过程中纤维填充方式、纤维叠层顺序、纤维种类以及不同纤维堆叠方向对复合材料抗冲击性能及破坏机制的影响。结果表明,玻璃纤维增强复合材料0°填充的抗冲击性能最佳,冲击强度为197.54 kJ/m^(2),约为抗冲击能力最差的90°填充方式的5倍;三种叠层顺序中包裹式分布的抗冲击能力最佳,冲击强度可达230.56 kJ/m^(2),约比均匀式分布试件的冲击强度高16.7%。玻璃纤维试样冲击强度最优,略高于高强度高温玻璃纤维,垂直堆叠试样的抗冲击性能普遍高于水平堆叠试样,最高冲击强度可达282.76 kJ/m^(2)。对3D打印过程中纤维状态进行研究,为提高3D打印连续纤维增强热塑性复合材料的冲击性能提供参考。In continuous fiber reinforced thermoplastic composites,the reinforcing phase fibers play a load-bearing role,and the filling state of the reinforcing phase inside the printing layer and the distribution position between layers have a significant impact on the mechanical properties of the product.To investigate the impact resistance of additive manufacturing parts under different fiber states,fiber reinforced thermoplastic composites were prepared using melt deposition technology,and impact performance experiments were conducted on the composite materials,scanning electron microscope images of the fracture surface were analyzed.The fiber filling,method and fiber stacking,sequence during the melt deposition molding process,the influence of fiber types and different fiber stacking directions on the impact resistance and failure mechanism of composite materials were deeply studied.The results show that the optimal impact toughness of glass fiber reinforced composite material filled at 0°is 197.54 kJ/m^(2),which is about 5 times that of the 90°filling method with the worst impact resistance;The optimal impact toughness of the wrapped distribution in the three stacking sequences can reach 230.56 kJ/m^(2),which is approximately 16.7%higher than the impact toughness of the uniformly distributed specimen.The optimal impact toughness of glass fiber specimens is slightly higher than that of high-strength high-temperature glass fibers.The impact performance of vertically stacked specimens is generally higher than that of horizontally stacked specimens,with a maximum impact toughness of 282.76 kJ/m^(2).By studying the fiber state during the 3D printing process,reference is provided for improving the impact performance of 3D printed continuous fiber reinforced thermoplastic composites.

关 键 词：冲击强度 熔融沉积 复合材料 连续纤维 纤维填充 微观分析 

分 类 号：TB332[一般工业技术—材料科学与工程]