连续纤维复合材料3D打印纤维排布影响分析

Analysis of the Impact of 3D Printed Fiber Arrangement on Continuous Fiber Composites

连续纤维增强热塑性复合材料(CFRTPCs)3D打印技术可以缩短CFRTPCs部件的开发周期并提高生产效率。为研究不同纤维排布对CFRTPCs 3D打印样件拉伸性能的影响,设计了三种增强层分布的CFRTPCs拉伸样件和六种层内纤维铺设角度不同的拉伸样件,并对样件拉伸损伤失效过程进行实验和仿真。实验结果表明,样件刚度和极限抗拉强度随纤维体积分数的增大均有提升,载荷方向与纤维排布间角度增大时样件弹性模量急剧下降;在设计连续纤维复合材料构件过程中,需适当提高纤维含量,减小纤维与载荷间夹角以提高性能。

Continuous fiber reinforced thermoplastic composites(CFRTPCs)3D printing technology can shorten the develop⁃ment cycle and increase the production efficiency of CFRTPCs parts.In order to investigate the effects of different fiber arrange⁃ments on the tensile properties of CFRTPCs 3D printed samples,three types of CFRTPCs tensile samples with different reinforce⁃ment layer distributions and six types of tensile samples with different fiber lay-up angles within the layers are designed,and the tensile damage failure process of the samples is experimented and simulated.The experimental results show that the stiffness and ul⁃timate tensile strength of the specimens increase with increasing fiber volume fraction,and the modulus of elasticity of the speci⁃mens decreases sharply when the angle between the load direction and the fiber arrangement increases.In the design of continuous fi⁃ber composites,it is necessary to increase the fiber content and reduce the angle between the fiber and the load to improve the per⁃formance.