补片结构设计对碳纤维复合材料修补试样拉伸性能的影响  

The Influence of Patch Structure Design on the Tensile Properties of Carbon Fi⁃ber Composite Repair Samples

作　　者：王乾 王振 WANG Qian;WANG Zhen(Shenyang Aerospace University,School of Aeronautics and Astronautics,Shenyang,110136,China)

机构地区：[1]沈阳航空航天大学,辽宁沈阳110136

出　　处：《郑州航空工业管理学院学报》2024年第5期5-12,共8页Journal of Zhengzhou University of Aeronautics

基　　金：中国学位与研究生教育学会重点课题(2020ZDB80);中国南方航空股份有限公司产学研项目(220123173)。

摘　　要：复合材料结构件维修中较为常用的修补方式为胶接修补。提出一种新型的补片结构,以提升胶接修补后复合材料试样的承载能力,通过建立三维渐进损伤有限元模型,对不同复合材料修补试样在单轴拉伸过程中补片的损伤机理进行分析。通过实验与有限元仿真,得到不同修补结构的拉伸强度和位移量等实验数据。结果表明:在单轴拉伸试验中工字形修补结构的复合材料层合板在失效时的最大位移载荷和拉伸强度分别达到3.49mm和319MPa,相对于阶梯形修补结构分别提升14.4%和5.1%。所建立的有限元仿真模型与试验结果吻合较好,可用于预测复合材料修补结构破坏模式和损伤的扩展。The bonded repair technology has been widely used in damaged composite structures.In this paper,a novel patch structure is proposed to enhance the load-bearing capacity of composite specimens after adhesive patching,The damage mechanism of patches of different carbon fiber composite repair structures during uniaxial stretching is analyzed by establishing a three-dimensional progressive damage finite element model.Experimental data such as tensile strength and maximum displacement of different composite repair structures were obtained through experi⁃ments and finite element simulations.The results show that in uniaxial tensile test the maximum displacement load and tensile strength of composite laminates with the new repair structure at failure reach 3.49 mm and 319 MPa,re⁃spectively,which are improved by 15.9%and 5.1%,respectively,relative to that of the stepped repair structure.The es⁃tablished finite element simulation model agrees well with the experimental results and can be used to predict the damage mode and damage extension of the composite repair structure.

关 键 词：片结构 碳纤维复合材料 胶接修补 拉伸性能 损伤扩展 破坏模式 

分 类 号：TB331[一般工业技术—材料科学与工程]