工艺与制造英文2022被引 20
热气枪辅助自动铺纤中碳纤维/PEEK带材的转向工艺
Steering of carbon fiber/PEEK tapes using Hot Gas Torch-assisted automated fiber placement
Aadhithya Rajasekaran, Farjad Shadmehri · Concordia University
摘要整理
采用热气枪（HGT）辅助自动铺纤（AFP）技术原位制造热塑性复合材料，通过避免高压釜固化等二次工艺，具有高效制造层板的潜力。AFP技术的优势在于能够实现纤维路径转向和变角度纤维（VAT）层板的制造，这类层板已被证实具有更优的力学性能。本研究采用HGT辅助AFP设备，系统研究了影响碳纤维增强热塑性带材（AS4/聚醚醚酮）转向工艺的参数。通过观察和测试，调查了转向半径、铺纤速度、重复铺覆次数和基体角度对转向带材几何形状和粘结强度的影响。设计了改进型搭接剪切试验方法，用于研究转向带材与基体间的粘结强度，并与高压釜处理样品（参考样品）进行了对比。研究结果表明：随着带材转向半径的减小，带材宽度减小，厚度增加；在较高铺纤速度下，转向诱发缺陷显著降低，缺陷呈间歇性分布，而低铺纤速度下缺陷连续分布；对转向带材进行重复铺覆可以平滑部分转向引起的带材缺陷；转向带材的搭接剪切强度与铺纤速度和基体角度相关。该研究为HGT辅助AFP工艺制造高性能变角度纤维层板提供了重要的工艺参数指导。
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