CF/PEEK超声原位固结铺放及其复合材料力学性能

doi:10.7527/S1000-6893.2018.22021

材料工程与机械制造

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CF/PEEK超声原位固结铺放及其复合材料力学性能

王鑫, 李勇, 还大军, 陈浩然, 张向阳

南京航空航天大学材料科学与技术学院, 南京 210016

收稿日期:2018-01-15 修回日期:2018-02-10 出版日期:2018-09-15 发布日期:2018-04-25
通讯作者: 李勇 E-mail:lyong@nuaa.edu.cn
基金资助:
国家"973"计划（2014CB046501）；江苏高校优势学科建设工程资助项目

Ultrasonic-assisted in-situ placement of CF/PEEK composite and its mechanical properties

WANG Xin, LI Yong, HUAN Dajun, CHEN Haoran, ZHANG Xiangyang

College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2018-01-15 Revised:2018-02-10 Online:2018-09-15 Published:2018-04-25
Supported by:
National Basic Research Program of China (2014CB046501); A Project Funded by the Priority Academic Program Development of Jiangsu High Education Institutions

摘要/Abstract

摘要： 热塑性复合材料自动铺放（ATP）原位固结成型是未来航空复合材料结构件的发展趋势，缩小其制件与热压制件性能的差距具有工程实践意义。基于超声原位固结成型工艺，制备碳纤维增强聚醚醚酮树脂基复合材料（CF/PEEK）层合板，并与铺放后热压和直接平板热压试样比较力学性能差异，为热塑性复合材料的自动铺放提供参考。结果表明，超声热源能够满足CF/PEEK铺放的能量要求，功率的增加和铺放速度的降低有利于铺层结合；与平板热压试样相比，铺放成型试样的孔隙率高，纤维存在部分损伤；在节省了平板热压后固化周期的情况下，超声铺放单向层合板试样拉伸强度、拉伸模量和层间剪切强度分别为1.32、113.8 GPa和39.2 MPa，达到了直接热压试样的80.4%、84.8%和65.1%，在经过热压后固化后，分别提高到直接热压的92.1%、92.6%和82.5%。超声原位固结成型试样的简支梁摆锤冲击失效形式为分层，其经过热压后，孔隙率下降，铺层结合强度提高，试样的冲击失效形式为断裂，与直接热压的相同。

关键词: 热塑性复合材料, 聚醚醚酮, 超声, 铺放, 力学性能

Abstract: 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.

Key words: thermoplastic composite, PEEK, ultrasonic, placement, mechanical property

中图分类号:

V261

王鑫, 李勇, 还大军, 陈浩然, 张向阳. CF/PEEK超声原位固结铺放及其复合材料力学性能[J]. 航空学报, 2018, 39(9): 422021-422029.

WANG Xin, LI Yong, HUAN Dajun, CHEN Haoran, ZHANG Xiangyang. Ultrasonic-assisted in-situ placement of CF/PEEK composite and its mechanical properties[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(9): 422021-422029.

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CF/PEEK超声原位固结铺放及其复合材料力学性能

Ultrasonic-assisted in-situ placement of CF/PEEK composite and its mechanical properties

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