工艺与制造英文2024被引 4
考虑辊压力影响的自动铺纤原位固化热塑性复合材料Mode I层间断裂行为研究
Study on Mode I interlaminar fracture behavior of automated fiber placement in situ consolidation thermoplastic composite considering the influence of roller compaction pressure
Chen Liu, Chen He, Zhongfeng Zou, Yong Li · R&D Center for Composite Industry Automation Nanjing University of Aeronautics and Astronautics Nanjing China
摘要整理
本研究深入探讨了激光辅助自动铺纤（AFP）原位固化热塑性复合材料层板在不同固化压力下的Mode I断裂行为。按照ASTM D5528标准，制备了T700碳纤维增强聚醚醚酮（T700-CF/PEEK）双悬臂梁（DCB）试样，并分为三个测试组，分别施加不同的辊压力：DCB-100N、DCB-500N和DCB-1500N。采用优化的基于ASTM标准的数据处理方法反演表征了试样的断裂韧性。建立了包含断裂过程区（FPZ）长度的三线性内聚区模型（CZM），用于模拟分层行为，实验结果与仿真预测具有良好的一致性。与其他两个测试组相比，DCB-1500N试样具有更多的层间桥接纤维和更高的扩展韧性。虽然纤维桥接区长度较短，但桥接纤维密度更高，因此纤维桥接对DCB-1500N试样韧性的影响更显著。本研究为热塑性复合材料（TPCs）抗冲击设计提供了理论指导，揭示了AFP固化压力与热塑性复合材料韧性断裂机制之间的内在关系，为材料加工工艺与断裂损伤机制的关联性研究提供了有价值的参考。
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