Figure 3: moisture uptake comparison of glass/epoxy, glass/linseed and glass/castor oil

1. Fluid Structure Interactions Research Group Hygrothermal ageing and the implications on adopting sustainable composite materials for structural marine applicationsMari Malmstein – M.Malmstein@soton.ac.ukSupervisors: Dr. James Blake and Dr. Alan Chambers Tension Compression Compression 0˚ fibres 90˚ fibres 1 mm Tension Figure 1: example application for sustainable composites – BeneteauOceanis Figure 2: castor oil resin Cracks Figure 6: unaged glass/epoxy (left) and 10 weeks aged glass/epoxy (right) showing changes from tensile/compressive into a tensile failure mode Tension Cracks 90˚ fibres Figure 7: unaged glass/linseed (left) and 3 days aged glass/linseed (right) showing changes from tensile/compressive into a compressive failure mode dominated by delamination 0˚ fibres 1 mm 1 mm Compression Figure 8: unaged (left) and 3 weeks aged glass/epoxy (right). Clean fibres in aged material indicate interfacial damage Figure 3: moisture uptake comparison of glass/epoxy, glass/linseed and glass/castor oil Figure 4: reduction of flexural strength over 20+ week ageing period 1 mm Figure 5: reduction of flexural strength vs. moisture uptake under accelerated and non-accelerated conditions Sustainable Composites Ltd and Bioresin are acknowledged for providing the natural resin systems IMarEST is acknowledged for providing additional funding for the project FSI Away Day 2012