纤维长度和表面处理对碳纤维层合板胶接结构的影响  

Effect of Fiber Length and Surface Treatment on Adhesive Joints of Composite Material

作　　者：石姗姗 刘子平 吕航宇 马嘉欣 SHI Shanshan;LIU Ziping;LYU Hangyu;MA Jiaxin(Zhan Tianyou College(CRRC College),Dalian Jiaotong University,Dalian 116028,China;Key Laboratory of Railway Industry on Safety Service Key Technologies for High-Speed Train,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学詹天佑学院(中车学院),辽宁大连116028 [2]高速列车服役安全关键技术铁路行业重点实验室、大连交通大学,辽宁大连116028

出　　处：《大连交通大学学报》2025年第2期94-98,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金项目(52271023);2023大连市科技人才创新优秀青年科技人才项目(2023RY025);辽宁省教育厅面上项目(JYTMS20230029);辽宁省交通科技项目(202245)。

摘　　要：为了改善复合材料接头的制作方式与力学性能,基于Kevlar短纤维增韧胶接接头,使用数字图像相关技术(DIC)对胶接接头的拉伸试验进行观测,得出接头的失效载荷与表面应变分布,研究胶层中的纤维长度与黏接表面的表面处理方式对单搭接胶接接头力学性能的影响。结果表明:纤维长度为0~1mm的Kevlar短纤维对胶接接头的增韧效果最好,可以提高胶接接头的失效载荷与伸长量,接头失效载荷提高到7.16kN,接头伸长量提高到3.97mm;表面打磨会使黏接失效更易发生,从而降低胶接接头的黏接性能。In order to improve the fabrication and mechanical properties of composite joints,tensile experiments of the glued joints were conducted using digital image correlation(DIC)based on Kevlar short fiber toughened glued joints to derive the failure load and the surface strain distribution of the joints and to study the effects of the fiber length in the adhesive layer and the surface treatment of the bonded surfaces on the mechanical properties of the single-lap bonded joints.The results show that the short Kevlar fiber with O-1 mm fiber length has the best toughening effect on the bonded joints,which can improve the failure load and elongation of the bonded joints.The failure load of the joints is increased to 7.16 kN,and the joints elongation is increased to 3.97 mm.The surface sanding will make adhesive bonding failures more prone to occur,which will reduce the bonded performance of the bonded joints.

关 键 词：复合材料 接头增强 芳纶纤维 胶接 应变分布 

分 类 号：TB332[一般工业技术—材料科学与工程]