Experimental and numerical investigation of a composite structure with frame and skin

被引：0
作者：
Li C. [1 ,2 ]
Xu S. [1 ]
Dong J. [1 ]
Liu B. [1 ]
Zhang Y. [1 ]
Zheng F. [3 ]
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] University of Chinese Academy of Sciences, Beijing
[3] School of Mechanical and Aerospace Engineering, Jilin University, Changchun
来源：
High Technology Letters | 2023年 / 29卷 / 01期
基金：
中国国家自然科学基金;
关键词：
bolted connection; composite; finite element analysis; hybrid bonded/bolted joint; tensile test;
D O I：
10.3772/j.issn.1006-6748.2023.01.003
中图分类号：
学科分类号：
摘要：
A composite structure with frame and skin based on cabin structure in a large space telescope is studied in this paper. The frame is composed of longitudinal and transverse beams with hybrid bonded/ bolted joints, and the skin is connected to the frame by bolts. Tensile tests are conducted on the structure by a set of test stand. It is observed that residual deformation occurs in the first test of the structure, which is attributed to the relative sliding between the skin and frame because of bolt-hole clearances. The high tightening torque and the increased number of the skin-frame bolts contribute to the high stiffness of the structure. A finite element model (FEM) of this composite structure is established, and the simulation model is verified by the experimental results. The FEM is contrastively analyzed with different frame joints, and it is found that adhesive joining in the hybrid bonded/ bolted joints enhances the stiffness of the structure significantly. Given that adhesive plays a leading role in the stiffness of the hybrid joints, Tie contact in FEM is proposed to simulate bonded or hybrid joints when studying the stiffness performance of undamaged structure. © 2023 Inst. of Scientific and Technical Information of China. All rights reserved.
引用
收藏
页码：22 / 30
页数：8
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