Mechanical characterisation of carbon fibre-PEEK manufactured by laser-assisted automated-tape-placement and autoclave
Mechanical characterisation of carbon fibre-PEEK manufactured by laser-assisted automated-tape-placement and autoclave
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DOI：
10.1016/j.compositesa.2014.10.003
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发表时间：
2015-02-01
影响因子：
8.7
通讯作者：
McCarthy, M. A.
中科院分区：
文献类型：
--
作者：
Comer, A. J.;Ray, D.;McCarthy, M. A.
通过自动胶带放置（ATP）原位固结热塑性复合材料来获得热压釜级的机械性能是具有挑战性的。然而，相对较新的高质量ATP级预浸料材料和配备更高效热源（例如激光器）的磁带头的可用性为实现改进的机械性能和沉积速率提供了机会。在本研究中，比较了激光辅助ATP （LATP）和高压灭菌法制备的碳纤维peek层压板。利用热电偶对LATP加工过程中的全厚度温度分布进行分析，表明LATP冷却速度非常快，并表明预浸料带可能不会发生全厚度熔化。与蒸压层压板相比，结晶度不足，加上空隙，降低了机械性能，但对LATP层压板的韧性有益。为了充分发挥LATP工艺在机械性能、能源需求、成本和沉积速率方面的潜力，需要对预浸料性能和加工参数进行优化。(C) 2014 Elsevier Ltd.版权所有。
Obtaining autoclave-level mechanical properties using in-situ consolidation of thermoplastic composites by Automated Tape Placement (ATP) is challenging. However, relatively recent availability of high quality ATP grade pre-preg material and tape heads equipped with more efficient heat sources (e.g. lasers) offers an opportunity to achieve improved mechanical properties and deposition rates. In the present study, carbon fibre-PEEK laminates, manufactured by laser-assisted ATP (LATP) and autoclave, are compared. Analysis of the through-thickness temperature distribution during LATP processing using thermocouples indicates that LATP cooling rates are extremely rapid and suggests full through-thickness melting of the pre-preg tape may not occur. Inadequate crystallinity, in conjunction with voids, compromised mechanical properties compared to autoclaved laminates but was beneficial in terms of the toughness of LATP laminates. Optimisation of pre-preg properties and processing parameters is required to realise the full potential of the LATP process in terms of mechanical properties, energy requirements, cost and deposition rates. (C) 2014 Elsevier Ltd. All rights reserved.