ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Tensile failure of carbon fiber composite material bonded-rivet hybrid repaired structure
Received date: 2023-03-09
Revised date: 2023-03-15
Accepted date: 2023-06-30
Online published: 2023-07-07
Supported by
Tianjin Science and Technology Plan(21JCYBJC00710)
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.
Liping LIU , Yuyang QI , Yueguo LIN , Rui BAO , Jianxin XU , Zhenyu FENG , Guanghui QING . Tensile failure of carbon fiber composite material bonded-rivet hybrid repaired structure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(24) : 428676 -428676 . DOI: 10.7527/S1000-6893.2023.28676
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