摘要
为了提升连续纤维增强热塑性复合材料(CFRTPCs)3D打印技术中树脂对纤维的浸渍能力,实现良好浸渍界面结合性能,利用自主研发的熔融浸渍纤维预处理装置进行碳纤维增强尼龙预浸丝制备,并以预浸丝为原材料进行复合材料3D打印研究。研究了浸渍过程与挤出成型过程中关键工艺参数对预浸丝及复合材料性能的影响。结果表明,经充分浸渍的预浸丝极限拉力和拉伸强度分别为118.2N和813.9MPa;当扫描间距为1.5mm,分层厚度为0.1mm时,拉伸强度和模量分别为558MPa和56GPa;利用微米X射线三维成像系统测得复合材料的孔隙率约为0.15%;准正交各向同性纤维铺层结构改善了复合材料的抗冲击性,能够达到的峰值载荷约为4.63kN。
In order to improve the impregnation ability of resin to fiber in continuous fiber reinforced thermoplastic composites(CFRTPCs)3D printing technology and realize good impregnation interface bonding performance,a new technology of continuous fiber reinforced thermoplastic composite pre-impregnation 3D printing was proposed.The 1K carbon fiber reinforced nylon(CCF/PA12)re–impregnation filament was prepared using the self-developed melt-impregnation fiber pretreatment equipment,and then used for the 3D printed composites as raw material.The effects of key process parameters during impregnation and 3D printing were studied.The results show that the ultimate tensile force and tensile strength for fully impregneted prepreg filaments are 118.2N and 813.9MPa respectively.When the scanning spacing is 1.5mm,the delamination thickness is 0.1mm,the tensile strength and modulus of 1K–CCF/PA12 composites are 558MPa and 56GPa respectively.The porosity of the composites measured by micro X–ray 3D imaging system is about 0.15%.The[0/45/90/–45]10 laminates improve the impact resistance and can achieve the peak load of about 4.63kN.
作者
田小永
张亚园
刘腾飞
李涤尘
TIAN Xiaoyong;ZHANG Yayuan;LIU Tengfei;LI Dichen(Xi’an Jiaotong University,Xi’an 710049,China)
出处
《航空制造技术》
CSCD
北大核心
2021年第15期24-33,共10页
Aeronautical Manufacturing Technology
基金
国家重点研发计划(2018YFE0207900)
国家自然科学基金(52075422)
王宽诚教育基金会资助项目。
关键词
连续纤维增强热塑性复合材料
预浸丝3D打印
熔融浸渍
界面性能
抗冲击性能
Continuous fiber reinforced thermoplastic composites(CFRTPCs)
Prepreg filament 3D printing
Melt impregnation
Interface performance
Impact resistance
