Structural adhesive bonding for marine applications

[摘要] In this present study, four cold curing adhesives, namely, F241, Redux 420, Araldite 2013 and XD 4416 were evaluated for bonding steel tapered double cantilever beams (TDCB) specimens. Fracture toughness of the adhesives were compared and evaluated at temperature range of -40 °C to 60 °C. From the results obtained, F241 bonded joints exhibited the best fracture strength at ambient temperature. Relatively good results were achieved at both high and lower temperature compared to Araldite 2013 and XD4416. It was also observed that XD4416 must be post cured in order to exhibit its full strength. Fatigue tests in a 'dry' environment were also performed on the bonded joints. R ratio ranging from 0.13 to 0.17 was studied. From the results it is clear that R ratio and maximum load is of considerable importance in influencing fatigue crack growth rate. Fatigue crack growth rate was observed to undergo a number of transitions in a nominally constant compliance test piece subjected to constant load ranges. The joint fracture strength was improved by incorporating primers. Two primers namely Permabond SIP and A-187 were studied on F241 bonded joints. Since SIP is recommend for F241 by the manufacturer, the highest strength was obtained. Relatively high fracture strength was also obtained with a 5% solution of A-187, in water.

[发布机构] University:University of Glasgow

[关键词] Materials science, Naval engineering