Optical self-sensing in composite materials

This project will extend work in to the development of novel glass reinforcing fibres that can be used as an optical sensing element for smart materials. So called self-sensing uses the reinforcing fibres to determine the state of the composite either during manufacture (cure monitoring) or through its life (condition monitoring), allowing the operator to investigate if problems arise. High refractive index glass, specifically tailored toward self-sensing using evanescent wave spectroscopy (for cure monitoring and chemical monitoring), and also as intensity-based sensors (for damage detection), have been developed at the University of Sheffield. In the project self-sensing composite materials will be produced and tested under varying conditions to determine the state of the composite, with a view to maximising the dimensions of the panels, while maintaining the sensitivity of the system. Production of glass fibres for the project will be undertaken, before panels are produced using vacuum assisted resin transfer moulding. The panels will then be tested using impact and mechanical testing methods.