Materials (Nov 2021)

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

  • Vlad Lupășteanu,
  • Dragoș Ungureanu,
  • Nicolae Țăranu,
  • Dorina Nicolina Isopescu,
  • Radu Lupășteanu,
  • Petru Mihai

DOI
https://doi.org/10.3390/ma14216722
Journal volume & issue
Vol. 14, no. 21
p. 6722

Abstract

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This paper presents the outcomes of an experimental and numerical study performed on epoxy-bonded single lap joints (SLJs) between carbon fiber-reinforced polymer (CFRP) composite strips and steel elements. For the experimental program, 34 specimens were prepared by varying the type of the composite strip and the type of adhesives and their thicknesses; all specimens were loaded in axial tension up to failure. The specific failure mechanisms were identified and commented on the basis of the performed tests, and the load–displacement curves were plotted. Additionally, the strain distributions along the bond lengths at different load stages, the shear stress–displacements (slip) variations and the stress–strain distributions for the CFRP strips were plotted and investigated. The numerical simulations, based on 3D finite element method (FEM) analysis, provided consistent results, in good agreement with the experimental ones for all parameters that were investigated and discussed in this paper.

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