自修复愈合剂添加方式对CFRP复合材料层间韧性的影响研究  

Study on Impact of Self-Healing Agent Addition Methods on Interlayer Toughness of CFRP Composites

作　　者：铁瑛[1] 范聪杰 张臻臻[1] TIE Ying;FAN Congjie;ZHANG Zhenzhen(Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]郑州大学,郑州450000

出　　处：《航空制造技术》2024年第20期58-67,共10页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52175153)。

摘　　要：采用试验和仿真结合的方法研究了热塑性材料聚乙烯–甲基丙烯酸(Poly ethylene-co-meth acrylic acid,EMAA)添加方式对碳纤维增强复合材料(Carbon fiber reinforced polymer,CFRP)层间韧性的影响。首先将EMAA制作为直径1.2 mm和50~75μm的细丝,然后分别以缝合和铺层的方式添加到CFRP复合材料中,通过调整缝线间距和铺层密度研究EMAA添加方式及含量对CFRP复合材料Ⅰ型层间断裂韧性和自修复效率的影响。结果表明,添加EMAA能显著增加CFRP复合材料的Ⅰ型层间断裂韧性,缝线增韧和铺层增韧时分别提升了110%和402%。此外,采用内聚力模型(Cohesive zone model,CZM)进行数值分析进一步证明了EMAA能够增强CFRP复合材料Ⅰ型层间断裂韧性。经过热修复后再次进行双悬臂梁(Double cantilever beam,DCB)试验,发现采用缝线增韧和铺层增韧的CFRP复合材料层间韧性得到有效恢复,修复效率达到85%和105%。The effect of the addition method of thermoplastic poly ethylene-co-meth acrylic acid(EMAA)on the interlayer toughness of carbon fiber reinforced polymer(CFRP)composites was studied using a combination of experimental and simulation methods.Firstly,EMAA was made into thin filaments with diameters of 1.2 mm and 50–75μm,and then added to CFRP composite materials by sewing and layering,respectively.The effects of EMAA addition method and content on the type I interlayer fracture toughness and self-healing efficiency of CFRP composite materials were studied by adjusting the suture spacing and layering density.The results show that the addition of EMAA significantly increased the type I interlayer fracture toughness of CFRP composite materials,with improvements of 110%and 402%achieved through stitching and layering,respectively.In addition,numerical analysis using the cohesive zone model(CZM)further demonstrated that EMAA can enhance the type I interlayer fracture toughness of CFRP composite materials.After thermal healing,double cantilever beam(DCB)tests were conducted again,and it was found that the interlayer toughness of CFRP composite materials toughened by suture and layup was effectively restored,with repair efficiencies reaching 85%and 105%.

关 键 词：碳纤维增强复合材料(CFRP) 聚乙烯–甲基丙烯酸(EMAA) Ⅰ型层间断裂韧性 增韧 自修复 

分 类 号：TB332[一般工业技术—材料科学与工程]