铆接夹层间隙对单搭接铆接头振动疲劳性能的影响研究  

Study on Effect of Riveting Sandwich Clearance on Vibration Fatigue Performance of Single-Lap Riveted Joint

作　　者：张辉[1] 潘新[1] 张永亮[1] 王辉 白继鹏[1] 杜杰 ZHANG Hui;PAN Xin;ZHANG Yongliang;WANG Hui;BAI Jipeng;DU Jie(AVIC Shenyang Aircraft Industrial(Group)Co.,Ltd.,Shenyang 110034,China)

机构地区：[1]航空工业沈阳飞机工业(集团)有限公司,沈阳110034

出　　处：《航空制造技术》2024年第16期147-154,共8页Aeronautical Manufacturing Technology

摘　　要：为了考虑装配间隙对单搭接结构振动疲劳性能的影响,利用ABAQUS软件建立了飞机发动机进气道局部结构金属铆接头的弹塑性有限元模型,采用Johnson-Cook失效模型模拟铆钉与被连接件的渐进失效行为,得到了不同装配间隙量的铆接头应力场分布与振动疲劳寿命。对单搭接铆接头进行振动疲劳试验,试验结果与仿真结果在疲劳寿命方面吻合较好,验证了数值模型的准确性。与无间隙模型相比,含间隙铆接试件各铆钉疲劳寿命降低了4.7%~18.0%,间隙的存在也导致了压铆过程中相邻铆钉间的挤压载荷传递,整体表现为铆钉与被连接板接触界面应力激增,导致有间隙铆接头残余应力场与无间隙铆接头残余应力场之间的差异,从而影响铆接头的振动疲劳性能。In order to explore the infuence of assembly clearance on the vibration fatigue performance of singlelap structure,an elastoplastic fnite element model of metal riveting joint of local structure in aircraft engine air intake is established by using ABAQUS software.The Johnson–Cook failure criterion is used to simulate the progressive failure behavior of rivets and connected parts,and the stress distribution and vibration fatigue life of riveting joint considering different assembly clearance amounts are obtained.The vibration fatigue test is carried out on single-lap riveting joint,and the experimental results are in good agreement with the simulation results in terms of fatigue life,which verifes the accuracy of the numerical model.Compared with the model without clearance,the vibration fatigue life of riveting joint with assembly clearance is significantly reduced by 4.7%–18.0%.The existence of clearance also leads to the transfer of extrusion load between adjacent rivets during riveting process,which is generally expressed as the stress surge at the contact interface between rivets and connected plates,leading to differences in residual stress felds of riveting joint with and without clearance,thereby affecting the vibration fatigue performance of riveting joint.

关 键 词：多紧固件铆接 单搭接接头 装配间隙 应力分布 振动疲劳寿命 

分 类 号：V262[航空宇航科学与技术—航空宇航制造工程]