风电叶片夹芯复合材料的结构设计与性能关系  

Relationship Between Structural Design and Performance of Sandwich Composite Materials for Wind Turbine Blades

作　　者：羊森林[1,2] 贾德壮 李磊 陈政元 徐家壮 钟淦基[1] Senlin Yang;Dezhuang Jia;Lei Li;Zhengyuan Chen;Jiazhuang Xu;Ganji Zhong(College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China;Dongfang Electric Co.,LTD,Deyang 618000,China)

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]东方电气风电股份有限公司,四川德阳618000

出　　处：《高分子材料科学与工程》2024年第11期119-126,共8页Polymer Materials Science & Engineering

基　　金：东方电气-四川大学联合攻关项目(32H0646);国家自然科学基金资助项目(U23A20583)。

摘　　要：文中研究了风电叶片夹芯复合材料的芯材设计参数(材质、密度和开槽方式)与其力学性能的关系。研究发现,聚对苯二甲酸乙二醇酯(PET)和聚氯乙烯(PVC)发泡芯材的泡孔结构存在显著差异,PET芯材泡孔壁呈规整结构,而PVC芯材泡孔壁含有微孔结构。在力学性能方面,PET芯材表现出较高的强度和模量,PVC芯材则具有较高的韧性。对于PET芯材,密度增加导致力学强度和模量提高,但韧性有所降低。文中还比较了不同的开槽方式对夹芯复合材料四点弯曲性能的影响,结果表明,上表面十字深槽、下表面一字浅槽的开槽方式可能有利于提高夹芯复合材料弯曲过程中的承受载荷。值得注意的是,PVC芯材制备的夹芯复合结构在四点弯曲测试中展现出优异的综合性能,这可能源于PVC芯材的韧性以及加强筋的增强效果。此外,PVC芯材泡孔壁上的微孔结构可能促进了灌注过程中其与环氧树脂的耦合作用,进一步改善了复合材料的性能。研究结果为优化风电叶片夹芯复合材料的结构设计提供了理论参考。The relationship between the design parameters of core material(including material,density,and slotting method)and mechanical properties of sandwich composites for wind turbine blades was investigated.The results indicate significant differences in the cellular structure of polyethylene terephthalate(PET)and polyvinyl chloride(PVC)core material.The cellular walls of PET core material are highly regular,while those of PVC core material exhibit microcellular structures.Furthermore,PET core material demonstrates superior mechanical strength and modulus,while PVC core material offers enhanced toughness.For PET core material,an increase in density correlates with higher mechanical strength and modulus,albeit at the expense of reduced toughness.The study also examined the impact of various slotting methods on the four-point bending performance of sandwich composites.The results suggest that the slotting method of deep cross grooves on the upper surface and shallow straight grooves on the lower surface may enhance the load-bearing capacity of sandwich composites during bending.Notably,the sandwich composites fabricated with PVC core material exhibit excellent comprehensive performance measured in four-point bending test,which can be attributed to the inherent toughness of PVC core material and the reinforcement ribs.Additionally,the microporous structures present in cellular walls of PVC core material may contribute to better coupling with epoxy resin during infusion process,further enhancing the properties of sandwich composites.This study provides theoretical guidance for optimizing the structural design of sandwich composite materials for wind turbine blades.

关 键 词：夹芯复合结构 风电叶片 发泡芯材 弯曲性能 

分 类 号：TM315[电气工程—电机]