Tensile failure of carbon fiber composite material bonded-rivet hybrid repaired structure

被引：0

作者：

Liu L. ^{[1
]}

Qi Y. ^{[1
]}

Lin Y. ^{[1
]}

Bao R. ^{[2
]}

Xu J. ^{[1
]}

Feng Z. ^{[3
]}

Qing G. ^{[1
]}

机构：

[1] College of Aeronautical Engineering, Civil Aviation University of China, Tianjin

[2] School of Aeronautic Science and Engineering, Beihang University, Beijing

[3] College of Safety and Engineering, Civil Aviation University of China, Tianjin

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2023年 / 44卷 / 24期

关键词：

adhesive-rivet hybrid repair; composite materials; failure mode; finite element analysis; tensile strength;

D O I：

10.7527/S1000-6893.2023.28676

中图分类号：

学科分类号：

摘要：

The experimental research was conducted on the intact composite plate and the composite bonded-rivet hybrid repairing structure，aiming at the tensile failure of carbon fiber composite bonded-rivet hybrid repairing structure. The load bearing ability and strain distribution mode during stretching and failure were analyzed. Through finite element simulation，the initiation and propagation of damage in the adhesive layer and mother board of the composite bonded-rivet hybrid re⁃ pairing structure were studied. Load division research was carried out on different positions in the hybrid repairing structure to analyze its load bearing mode and load transmission route，further revealing its failure mode. The results show that un⁃ der tensile load，the adhesive layer starts to fail first and expands inward along two edges of the load direction due to peel⁃ ing stress caused by patch warping resulting from eccentric loading during stretching. After most of the adhesive layer fails，failure of the mother board begins from 90° layers outside row rivet holes and expands perpendicular to the load di⁃ rection. Subsequently，±45° and 0° layers exhibit similar damage patterns. During stretching，part of the tensile load can be transmitted to the patch through both adhesive layer and rivets，thereby improving mechanical properties ofthe hybrid repairing structure. © 2023 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.

引用

共 23 条

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