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Durability of an adhesively bonded joint between steel ship hull and composite superstructure pre-exposed to marine environment.
  • +4
  • Pankaj.R. Jaiswal,
  • Rahul Iyer Kumar,
  • Luc Mouton,
  • Linda Starink,
  • Ioannis Katsivalis,
  • Cedric Verhaeghe,
  • Wim De Waele
Pankaj.R. Jaiswal
Universiteit Gent Vakgroep Mechanische Constructie en Productie

Corresponding Author:[email protected]

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Rahul Iyer Kumar
Universiteit Gent Vakgroep Mechanische Constructie en Productie
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Luc Mouton
Bureau Veritas Group
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Linda Starink
Lloyd's Register EMEA
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Ioannis Katsivalis
University of Cambridge Department of Engineering
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Cedric Verhaeghe
Damen Schelde Naval Shipbuilding
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Wim De Waele
Universiteit Gent Vakgroep Mechanische Constructie en Productie
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Abstract

This paper outlines an experimental investigation into the durability of large-scale adhesively bonded joints immersed in a 3.5 wt% NaCl solution for 10 weeks at 50°C. Two aged and one unaged specimen were subjected to tensile testing up to failure, and three aged and one unaged specimen were loaded up to ~3.5 million fatigue cycles followed by a residual tensile test. The shear, longitudinal, and peel strain values in adhesive bulk (evaluated by the digital image correlation (DIC) technique) are significantly higher at the gripped sides due to the asymmetrical design of the steel brackets. The shear strength and stiffness of statically and fatigue tested specimens are found to be identical. The shear strength values are significantly higher than the requirements following from the design. All specimens failed by sudden delamination of the composite plate. Post-mortem analysis showed no corrosion travel at the interface of steel and adhesive.