Effect of over-ply on moisture absorption behavior of scarf-repaired composite laminate

Jie Zhang, Xiaoquan Cheng, Yujia Cheng, Xin Guo, Liu Yang

Research output: Contribution to journalArticle

Abstract

The over-ply covering the bondline in scarf-repaired laminates can avoid direct exposure of the adhesive to moisture environment which would decrease the properties of the adhesive. The effect of the over-ply on moisture absorption behavior of scarf-repaired composite laminate was studied in this paper. 3D finite element models (FEMs) of scarf-repaired laminates with and without over-ply were established to simulate the moisture absorption behavior and verified by experimental results. Then these models were used to investigate the effects of some factors, including over-ply type, configuration, direction and number, on moisture absorption behavior of the repaired structures, especially of the adhesive. The results show that the over-ply can efficiently decelerate moisture absorption of the adhesive and delay the time of its moisture absorption equilibrium. Over-ply type has effect on moisture absorption of the adhesive. Woven over-ply is more effective to protect the adhesive in repaired laminates from moisture absorption than unidirectional over-ply. For the laminates with only large-circle bonding surface covered, over-ply lap length, configuration and direction are not very important parameters to affect the moisture absorption.
Original languageEnglish
Article number102683
JournalInternational Journal of Adhesion and Adhesives
Volume102
Early online date18 Jul 2020
DOIs
Publication statusE-pub ahead of print - 18 Jul 2020

Keywords

  • composite laminate
  • scarf repair
  • over-ply
  • moisture absorption behavior

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