混合垫片对称性对复合材料单搭接接头力学性能的影响  

Effect of Hybrid Gasket Symmetry on Mechanical Properties of Composite Single-lap Joints

作　　者：李雨霏 安鲁陵[1] 孙强 刘宁 赵付山 LI Yufei;AN Luling;SUN qiang;LIU Ning;ZHAO Fushan(College of Mechanical and Electronic Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械制造与自动化》2024年第4期32-36,共5页Machine Building & Automation

基　　金：国家自然科学基金项目(5197051852)。

摘　　要：以复合材料单搭接接头为研究对象,通过有限元分析与实验对比,研究混合垫片对称性对复合材料单搭接接头拉伸刚度与峰值载荷的影响;通过视频引伸计观测接头在动载荷下的位移值,研究混合垫片对称性对接头疲劳寿命及孔变形量的影响。研究表明:混合垫片对称性对接头拉伸极限载荷及拉伸刚度影响极小;但使用非对称垫片填隙结构复合材料表面,特别是在液体垫片较厚的一侧,易出现应变集中区。承受动载荷后,接头的孔变形存在非对称现象,且采用非对称混合垫片进行填隙时,结构孔变形的非对称性更强。The influence of hybrid gasket symmetry on the tensile stiffness and peak load of composite single-lap joints is studied by finite element analysis and experimental comparison.The displacement value of the joint under dynamic load is observed by video extensometer,and the influence of hybrid gasket symmetry on the fatigue life and hole deformation of the joint is studied.The results show that the symmetry of the hybrid gasket has little effect on the tensile limit load and tensile stiffness of the joint,the surface of composite materials using asymmetric gaskets to fill the gaps,especially on the thick side of the liquid gasket,however,is prone to strain concentration areas.After bearing dynamic load,the hole deformation of the joint has asymmetry,and when the asymmetric hybrid gasket is used for gap filling,the asymmetry of the structural hole deformation is stronger.

关 键 词：复合材料 混合垫片 单搭接接头 力学性能 

分 类 号：V229.7[航空宇航科学与技术—飞行器设计]