Experimental Study on Steel to FRP Bonded Lap Joints in Marine Applications

Abstract

Steel structures coated with fiber-reinforced polymer (FRP) composites have gained wide acceptance in marine industry due to their high strength-to-weight ratio, good protection from environmental degradation, and impact loads. In this study, adhesive bonding performance of single-lap bonded joints composed of steel coated with FRP has been investigated experimentally for three different surface roughness and two epoxy types. Single-lap bonded joints have been tested under tensile loading. The adhesive bonding performance has been evaluated by calculating the strain energy values. The results reveal that the surface roughness of steel has a significant effect on the bonding performance of steel to FRP combinations and the performance of the resin can be improved by using the primer in an economical way.

Stainless steel coupled with carbon nanotube-modified epoxy and carbon fibre composites: Electrochemical and mechanical study

“…Differences in the mechanical and physical properties of steel and FRCs create difficulties in ensuring a strong bond and reducing the possibility of delamination, particularly in the presence of temperature fluctuations. [5][6][7] Another detrimental factor affecting the joint repair is the steel surface morphology. Primer coating, grit blasting and chemical etching are some of the studied surface modification techniques proposed in the literature.…”

Application of Bonded Joints for Quantitative Analysis of Adhesion

“…A clean surface is a necessary condition for adhesion but it is not a sufficient condition for bond durability. Most structural adhesives work as a result of the formation of chemical bonds (mainly covalent, but some ionic and static attractive bonds may also be present) between the adherend surface atoms and the compounds constituting the adhesive [10][11][12].…”

Experimental Study and Mixed‐Dimensional FE Analysis of T‐Rib GFRP Plate‐Concrete Composite Bridge Decks

“…Compared with the FRP structure, the FRP-concrete composite/hybrid structures have more advantages, such as preventing the buckling phenomena of pultruded FRP profiles [1,2], improving the usage of FRP profiles strength [3], reducing material costs [4], and improving stability, flexural stiffness, and bearing capacity of structures [5]. Furthermore, the FRP profiles/plates can act as a temporary formwork when pouring the cast-in-place concrete [6]. Hence, the application of FRP-concrete composite bridge decks becomes more and more widespread in recent years [7][8][9][10][11][12][13][14].…”