工艺与制造英文2022被引 1
自动纤维铺放工艺中预浸料粘结界面形成的两阶段模型
Two-stage model of prepreg bonding interface formation in automated fiber placement process
Rui Xiao, Wang Wang, Jiaqi Shi, Jun Xiao · Nanjing University of Aeronautics and Astronautics, Nanjing, China
摘要整理
虽然热固性基体复合材料的自动纤维铺放（AFP）技术在航空工业中应用广泛，但关于粘结界面形成过程的物理模型与AFP工艺中预浸料层间实际粘结强度之间的关系研究仍缺乏定论。现有研究虽积累了大量预浸料初粘性数据，但工程师难以将其作为选择工艺参数的决定性依据。本研究基于爬虫模型和粘弹性力学模型，建立了预浸料铺放物理模型，将粘结界面形成过程分为扩散阶段和粘性阶段两个阶段。通过特殊设计的高速铺放实验平台进行了铺放-剥离实验，模拟了实际AFP工艺参数，获得了不同铺放压力下铺放速度与剥离能量的对数曲线。对数曲线的斜率和剥离后样品表面形貌证实了所建模型的正确性。实验数据表明，预浸料剥离时，在100~200 mm/s的铺放速度范围内发生了从内聚破坏模式向界面破坏模式的转变。这些结果可为选择AFP工艺参数提供参考，以实现良好粘结质量与相邻预浸料层无损分离之间的平衡。
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