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所属单位：材料科学与技术学院

发表刊物：Hangkong Xuebao

摘要：Automated Tape Placement (ATP) of thermoplastic composites combined with in-situ consolidation is the general trend in the field of aeronautic composite structures. It is of practical significance to narrow the gap between mechanical properties of products manufactured by ATP and by hot pressing. Based on processing of ultrasonic-assisted placement with in-situ consolidation technique, laminates of carbon fiber reinforced poly (ether ether ketone) matrix composites (CF/PEEK) were manufactured and compared with straight hot-pressing and post-consolidated specimens in terms of mechanical properties, offering reference for ATP of thermoplastics composites. The results show that the ultrasonic heat source can meet the energy requirement for CF/PEEK placement. Higher power of heat source and lower placement speed can help with combination of layers. The specimens manufactured by ultrasonic-assisted placement show characteristics of high porosity and some fiber injury. Ultrasonic-assisted placement can shorten consolidation cycle after hot-pressing. The tensile strength, modulus, and interlaminar shear strength of unidirectional laminate specimens are 1.32, 113.8, and 39.2 MPa respectively (80.4%, 84.8%, and 65.1% of those of hot-pressing specimens respectively), and rise to 92.1%, 92.6% and 82.5% of those hot-pressing ones respectively after post-consolidation. The failure form of pendulum impact failure of hot-pressing specimens is delamination, and changes into fracture after post-consolidation with less porosity and higher bonding strength between layers, the same as that of the straight hot-pressing ones. © 2018, Press of Chinese Journal of Aeronautics. All right reserved.

ISSN号：1000-6893

是否译文：否

发表时间：2018-09-25

合写作者：王鑫,李勇,Huan, Dajun,Chen, Haoran,Zhang, Xiangyang

通讯作者：李勇,李勇,王薪