工艺与制造英文2025被引 1
打印参数和路径对连续碳纤维复合材料3D打印翘曲变形的影响
Influence of Printing Parameters and Paths on Warpage in <scp>3D</scp> Printing of Continuous Carbon Fiber Composites
Jianming Zhou, Fuji Wang, Gongshuo Wang, Rao Fu, Hongquan Wang, Shouyan Guan · Dalian University of Technology
摘要整理
连续碳纤维增强热塑性复合材料(C-CFRTP)的3D打印技术能够实现轻量化、高强度复杂结构件的一体化制造。然而,C-CFRTP打印件的翘曲变形仍是制约其应用的关键问题。虽然打印参数和打印路径对翘曲变形有重要影响,但对其作用机制的认识不足,阻碍了工艺优化。本研究系统调查了基础温度、喷嘴温度和打印速度等工艺参数对C-CFRTP打印件翘曲变形的影响规律。通过定量表征打印过程中的温度梯度,分析了翘曲变形的驱动机制,阐明了各工艺参数的作用效果。最后对打印路径(0°/0°、0°/90°和−45°/45°)进行了优化以实现最小变形。研究结果表明:提高基础温度和打印速度、降低喷嘴温度能够减小打印件所经历的温度梯度,促进均匀收缩和应力松弛,从而显著降低翘曲变形。通过纤维取向控制热梯度和应力分布可实现最优的翘曲抑制效果。在−45°/45°打印路径下的翘曲变形最小,仅为0°/0°路径下的12%。本研究为降低3D打印C-CFRTP件的翘曲变形提供了重要指导。
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