This document presents results from an investigation performed at IFREMER to evaluate the durability of alternative composite materials for tidal turbine blades. The report consists of two parts; the first examines the mechanical properties of four novel composite combinations (carbon/PA6, carbon/green epoxy, glass/PP and flax/acrylic) and compares them to those of traditional carbon and glass/epoxy composites. The second part examines the influence of seawater immersion on properties under quasi-static and cyclic loading.

(Paper submitted but not yet approved by PO)