For offshore pipe laying purposes, an investigation was made on the friction behaviour of several composite materials.


For screening purposes, friction tests on flat specimens were performed to evaluate different materials in dry and wet (seawater) conditions. The friction tests consisted of applying a normal force on specimens covered with specific materials, while the surfaces moved in the axial direction.
Friction test equipment was used whereby axial force is applied to anvils, pressed onto a flat sheet. This steel sheet is then pulled upwards through the anvils. The upscaling was done using a shear tester with material from larger sections fixed onto steel sheets.


The best composite material was selected in terms of its static and dynamic friction and shear behaviour.