补片设计对碳纤维复合材料弯曲性能的影响分析  

Analysis of the Effect of Patch Design on the Bending Properties of Carbon Fiber Composites

作　　者：王乾 韩东 WANG Qian;HAN Dong(Shenyang Aerospace University,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》2025年第2期21-27,共7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：复合材料胶接修补中,与广泛使用的“阶梯型”补片布局相比,“工字型”补片布局是一种拥有更强力学性能的替代方法。基于航空复合材料低成本维修需求,采用玻璃纤维复合材料补片修补碳纤维复合材料受损试样。通过有限元仿真与三点弯曲实验相结合的方法,系统分析了修补区域的损伤演化规律。研究表明:工字型补片改变了修补试样裂纹扩展路径,抑制了损伤的持续扩展,有效提升了修补试样的力学性能。实验结果显示,“工字型”修补试样的弯曲强度较“阶梯型”修补试样提高17.95%;经湿热处理后,其弯曲强度仍显著优于未处理阶梯型试样。Compared to the widely used stepped patch configuration in composite bonded repairs, the I-shaped patch layout demonstrates superior mechanical performance. To meet cost-efficiency requirements in aerospace composite maintenance, glass fiber composite patches are applied to repair damaged carbon fiber composite specimens. The damage evolution mechanisms in the repaired regions are systematically investigated through finite element simulations and three-point bending tests. Results reveal that the I-shaped patch configuration effectively enhances the mechanical properties of repaired specimens by altering crack propagation paths and inhibiting ongoing damage progression. Experimental results show an 17.95% improvement in flexural strength for I-shaped repaired specimens compared to their stepped counterparts. Furthermore, even after hygrothermal treatment, the I-shaped specimens maintain significantly higher bending strength than untreated stepped specimens.

关 键 词：复合材料胶接修补 裂纹扩展路径 损伤分析 三点弯曲 

分 类 号：TB33[一般工业技术—材料科学与工程]