工艺与制造英文2020被引 30
自动纤维铺放弯曲纤维层复合材料层板I型断裂韧性研究
Study on mode-I fracture toughness of composite laminates with curved plies applied by automated fiber placement
Chen Liu, Ruixiang Bai, Zhenkun Lei, Jianyu Di, Dili Dong, Tiancheng Gao, Hao Jiang, Cheng Yan · Dalian University of Technology
摘要整理
层间断裂韧性是表征碳纤维增强环氧树脂层板分层性能的重要参数。本研究通过实验和数值模拟方法，研究了不同局部纤维铺放角度的层间界面I型断裂韧性。按照ASTM-D5528–01标准制备了T800碳纤维/EH104环氧树脂双悬臂梁试样，其中4个试样具有直纤维层界面（0°//0°、15°//−15°、30°//−30°和45°//−45°），2个试样具有弯曲纤维层界面（曲率半径分别为300 mm和500 mm）。采用基于改进梁理论的数据处理方案表征I型断裂韧性。结果表明，弯曲纤维层界面试样的I型断裂韧性值明显高于直纤维层界面试样。研究结果表明，通过自动纤维铺放技术引入纤维层弯曲可以显著提高层间断裂韧性，为复合材料层板的结构设计和性能优化提供了重要参考。
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