工艺与制造英文2024被引 3
自动铺纤工艺中接触力学建模与缺陷机制研究
Modeling of contact mechanics and defects investigation in automated fiber placement
Lei Miao, Weidong Zhu, Yingjie Guo, Shubin Zhao, An Li · Zhejiang University
摘要整理
预浸料纤维在复杂曲面上的铺层质量是自动铺纤（AFP）工艺的核心关注点，与牵引滚动接触中的接触应力密切相关。本文建立了一套考虑模具曲率、接触对象力学性能和位姿信息的牵引滚动接触解析模型，使其适用于不规则曲面和任意工艺条件。该模型将经典Hertz接触理论扩展至三维接触区域，通过多尺度变形统一表征，在几何约束条件下精确计算接触应力。基于该模型，系统分析了AFP工艺中粘着、微滑以及两者之间的转变现象。为便于工程应用，提出了快速获取模具局部曲率的离散处理策略，并设计了计算任意路径接触应力的算法。在某飞机构件上的实验验证表明，所提模型能准确恢复AFP工艺中的接触应力分布。结合具体铺层信息，该模型可用于预测铺层缺陷和工艺参数优化。研究成果为自动铺纤工艺的质量控制和工艺改进提供了理论支撑。
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