工艺与制造英文2021被引 3
基于时间-温度等效原理的自动铺纤工艺层间正应力许用值研究
Study of Allowable Interlaminar Normal Stress Based on the Time–Temperature Equivalence Principle in Automated Fiber Placement Process
Rui Xiao, Jiaqi Shi, Jun Xiao · College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
摘要整理
自动铺纤（AFP）是一种劳动节约型自动化成型技术，在航空等领域得到广泛应用。该工艺中凹面脱层是常见缺陷，但现有研究对其发生条件的认识不足。为预测该缺陷的发生，提出了层间正应力许用值的概念来定义其发生条件，基于该概念采用时间-温度等效原理进行探针试验。通过探针试验测得的铺纤速度/许用正应力曲线，讨论了许用正应力的物理意义。同时对测量曲线进行定量分析，结合粘弹性理论和分子扩散爬行模型，确定了金属/预浸料层和预浸料/预浸料层界面脱层形成过程中的主导作用机制。最后利用实验数据指导自动铺纤工程应用中的工艺参数选择，并验证了其正确性。该研究为AFP工艺中凹面脱层缺陷的预防和控制提供了理论依据和实验支撑。
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