Interlaminar adhesion assessment of carbon-epoxy laminates under salt water ageing using peel tests

Abstract

The aim of this study is to assess the interlaminar adhesion of carbon-epoxy laminates under salt water condition. Carbon-epoxy laminate specimens were immersed in a salt water tank for 60 days. Some specimens were then dried at room temperature for 280 days, until recovering their initial weight. Specimens were tested using the composite peel test, an adaptation of the floating roller peel tests for composite materials. The results showed a degradation of peel strength in some areas due to the ageing process. The drying process did not affect the test results. A scanning electron microscopic analysis carried out on the fracture surface of the specimens revealed a typical mode I failure microstructure. A mixture of matrix failure and fibre/matrix interfacial failure was observed in non-aged specimens. Finally, a chemical characterization of the fracture surfaces with energy-dispersive spectroscopy confirmed the penetration of salt water in regions near the edge of the specimens. A degradation of the fibre/matrix interface adhesion was observed in affected areas. Floating roller peel tests proved to be a fast and effective method to access the interlaminar adhesion performance of composite laminates.

Enhancing the Anti-Corrosion and Reinforcing Properties of Epoxy Coatings using Modified Graphene Oxide

“…The peel strength data received for mild steel and copper indicated that the addition of modified GO (GO-KF) enhanced the peel strength of the epoxy coating. 39 This proved that modified GO acts as a good reinforcing agent. The corrosion protection mechanism of epoxy coating without any reinforcing agent is simple.…”

Designing Modified Graphene Oxide-epoxy Coatings for Enhancing the Corrosion Resistant Performance of Mild Steel in Sodium Chloride Solution

“…Peel strength value of the GO-BD/epoxy coating was found to be 1.478N. The strength of GO-BD/ epoxy composite coating was better than the neat epoxy and epoxy treated with GOcoating 40 . This showed that GO-BD increased the strength of the coating.…”

Contributions of interfaces on the mechanical behavior of 3D printed continuous fiber reinforced composites

“…However, the forces for the PA-PA interface dropped suddenly after 20 mm displacement. The average peel loads were determined along 100 mm peeling lengths ranging from 20 mm to 120 mm, discarding the first 20 mm displacement (except for the PA-PA interface) [34,35]. According to this method, as seen in Fig.…”