工艺与制造英文2024被引 14
热气枪辅助自动纤维铺放工艺中热塑性复合材料三维传热分析
Three-dimensional heat transfer analysis of Hot Gas Torch (HGT)-assisted Automated Fiber Placement (AFP) for thermoplastic composites
Lorenz Zacherl, Allyson Fontes, Farjad Shadmehri · Concordia University
摘要整理
自动纤维铺放（AFP）是生产复杂复合材料结构的关键增材制造工艺。本研究针对采用热气枪（HGT）的热塑性复合材料原位AFP工艺进行研究，该工艺包括加热、固结和凝固阶段。温度控制对获得高质量零件至关重要，因为它影响粘结质量、结晶和凝固过程。然而，以往研究通过假设恒定对流换热系数来简化对流传热，导致仿真与实验结果存在偏差。本文提出了一种新颖的分布函数来模型化对流换热系数，从而改进温度预测精度。通过优化循环确定该分布函数的参数，确保与实验数据的一致性。所提方法准确预测了温度分布，并通过未见过的实验结果进行了验证。通过引入对流换热系数的分布特性，本研究深化了对热塑性复合材料AFP工艺传热机制的理解，有助于改进制造工艺和零件质量。
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