Flexural performance of squared one-sided CFRP patches: modelling and experimental study

Ibrahim Abdelfattah, Francisca Ferreira, Mohamed Nasr Saleh, Paulo N.B. Reis, Sofia Teixeira De Freitas*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

63 Downloads (Pure)

Abstract

Three-point bending analysis, experimental and numerical, is conducted for three different sizes, 30*30 mm, 40*40 mm and 60*60 mm, of one-sided square cross-ply TEXIPREG HS 160 RM carbon-fiber-reinforced polymer (CFRP) patches as well as intact and notched specimens. The tests are carried out with the aim to study the influence of the patch’s size on the flexural properties of the specimen. Hashin-2D damage initiation criterion is adopted to investigate the failure in each ply, and the damage evolution is represented by the stiffness degradation. The intact and notched laminates flexural properties are investigated as well as notch sensitivity. The bonded patch repairs efficiency is investigated in the light of ultimate load, flexural modulus, peel and shear stresses along the bond-line as well as the damage initiation coefficient at critical zones. A significant advancement in the flexural modulus and ultimate load for the repaired laminates is noticed with increasing the patch’s size. A Parametric numerical study is conducted to investigate the influence of the patch size on the damage initiation coefficient at the critical zones. The recommended patch’s size is 44*44 mm in order to avoid failure initiation at the patch corner overlap on the parent laminate.

Original languageEnglish
Pages (from-to)473-491
Number of pages19
JournalJournal of Adhesion
Volume99
Issue number3
DOIs
Publication statusPublished - 2022

Keywords

  • delamination
  • Destructive testing
  • epoxy/epoxides
  • finite element analysis
  • repair

Fingerprint

Dive into the research topics of 'Flexural performance of squared one-sided CFRP patches: modelling and experimental study'. Together they form a unique fingerprint.

Cite this