北京航空航天大学学报 ›› 2013, Vol. 39 ›› Issue (10): 1408-1413.

• 论文 • 上一篇    下一篇

复合材料混合连接结构拉伸性能与影响因素分析

黄文俊1, 程小全2, 武鹏飞2, 李钟海2   

  1. 1. 南京航空航天大学 航空宇航学院, 南京210016;
    2. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2012-12-28 出版日期:2013-10-30 发布日期:2013-11-13
  • 作者简介:黄文俊(1972-),男,江西临川人,博士生,chrdihwj@163.com.

Analysis on tensile properties and influence factors of composite hybrid joints

Huang Wenjun1, Cheng Xiaoquan2, Wu Pengfei2, Li Zhonghai2   

  1. 1. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2012-12-28 Online:2013-10-30 Published:2013-11-13

摘要: 胶螺混合连接设计适当,能够提高结构的连接效率.针对复合材料胶螺(螺钉)混合连接结构中存在的分析与设计问题,在ABAQUS软件平台上建立了损伤累积三维有限元模型,其中考虑了胶层物理非线性以及非线性接触等问题,连接结构拉伸强度及损伤破坏过程的计算结果与试验结果基本吻合,证明了所建模型的有效性.在此基础上,研究了复合材料层合板端头翻边、胶层厚度、胶层韧性以及接触面摩擦系数等因素的影响.结果表明:复合材料层合板端头翻边对混合连接结构具有增强作用,能够提高结构的拉伸强度;韧性胶层能够提高结构的拉伸强度,但胶层厚度对结构的强度基本没有影响;螺钉杆与连接孔接触面间摩擦系数越大,连接结构的拉伸强度越高.

Abstract: Proper bolted or screw / bonded hybrid joint design can improve the structure efficiency. In order to solve the analysis and design problems that exist in screw / bonded hybrid composite joint structures, a 3D damage accumulation finite element analysis (FEA) model was established based on the software of ABAQUS. Non-linear properties of the adhesives and non-linear touch problems were included in this model. The analysis results of the tensile strength and damage propagation and failure of the joint structures agree with the test results. And the model effectiveness was proved. Then the influence factors such as the flange at the tip of the laminates, adhesive film thickness, adhesive toughness and contact surface friction coefficients on the joint tensile properties were studied. The results show that the flange at the laminate tip can reinforce the hybrid joint structures and improve their tensile strength. Adhesive with high toughness can improve the joint tensile strength and the film thickness almost has no effect on the strength. Higher friction coefficient between the screw pin and the hole surface can give greater joint tensile strength.

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