航空科学技术2024，Vol.35Issue(6)：37-43,7.DOI:10.19452/j.issn1007-5453.2024.06.005
沉头螺栓锪窝误差对复合材料连接结构承载性能影响分析
Influence of Countersunk Bolt Geometry Error on the Bearing Performance of Composite joint Structure
摘要
Abstract
As an important joint form in modern aircraft composite structures,countersunk bolts have a direct impact on the service performance of the structure due to their dimple accuracy and assembly quality.Countersunk bolts are widely used in aircraft composite joint structures due to their ability to ensure surface flatness of the joint structure.Due to process and structural limitations,dimple angle and depth errors are usually unavoidable and have an impact on the mechanical properties and load-bearing capacity of the jointing structures.In response to the above issues,this paper conducted a study on the impact of geometric errors in countersunk bolt dimpling on the load-bearing mechanism and strength of composite joints.Based on the definition of angle error,deflection direction error and depth error,loading experiments were conducted under different errors and microscopic analysis was conducted.By analyzing the loading curves and interface morphology,the structural damage mechanism and joint failure load under different errors were revealed,and the influence of dimple geometry error on the mechanical behavior of composite countersunk bolt single lap joint was explored,which provided theoretical basis for the efficient engineering application of countersunk bolts in composite joint structures.关键词
沉头螺栓/角度误差/偏转方向误差/深度误差/损伤机理/失效载荷Key words
countersunk bolt/dimple angle error/dimple deflection direction error/dimple depth error/damage mechanism/failure load分类
航空航天引用本文复制引用
邹鹏,刘盈利..沉头螺栓锪窝误差对复合材料连接结构承载性能影响分析[J].航空科学技术,2024,35(6):37-43,7.基金项目
国家自然科学基金(52005458,52035011) （52005458,52035011）
航空科学基金(2018ZE23011) National Natural Science Foundation of China(52005458,52035011) （2018ZE23011）
Aeronautical Science Foundation of China(2018ZE23011) （2018ZE23011）
