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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (24): 428676-428676.doi: 10.7527/S1000-6893.2023.28676

• Material Engineering and Mechanical Manufacturing • Previous Articles    

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

Liping LIU1(), Yuyang QI1, Yueguo LIN1, Rui BAO2, Jianxin XU1, Zhenyu FENG3, Guanghui QING1   

  1. 1.College of Aeronautical Engineering,Civil Aviation University of China,Tianjin  300300,China
    2.School of Aeronautic Science and Engineering,Beihang University,Beijing  100083,China
    3.College of Safety and Engineering,Civil Aviation University of China,Tianjin  300300,China
  • Received:2023-03-09 Revised:2023-03-15 Accepted:2023-06-30 Online:2023-07-10 Published:2023-07-07
  • Contact: Liping LIU E-mail:liuliping_tj@163.com
  • Supported by:
    Tianjin Science and Technology Plan(21JCYBJC00710)

Abstract:

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 repairing 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 under tensile load, the adhesive layer starts to fail first and expands inward along two edges of the load direction due to peeling 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 direction. 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.

Key words: composite materials, adhesive-rivet hybrid repair, finite element analysis, failure mode, tensile strength

CLC Number: