In the search of an adequate real time strain measurement method in aluminium cast, with great interest the use of Fiber-Bragg-Grating (FBG) is investigated. In order to do so a setup in a lab is conducted to experimentally analyse the behaviour of glass fiber sensors in liquid aluminium alloys at temperatures up to 800 °C. This setup allows to improve a numerical model of the fiber alloy composite. FBG is an optical measurement method, which uses engraved Bragg reflectors in a 125 micrometre in diameter thick glass fiber. This reflector transmits most of the wavelengths but only reflects one specific wavelength. This specific wavelength can be measured and changes due to the influencing axial strain being forced onto the grating by the fluid alloy reaction and by the changes in temperature. By using a so called mirror furnace, several experiments with the fiber alloy composite are being evaluated. These measurements are also the base for the further understanding of hot tearing. Concluding the results promising data is collected, both numerical as well as experimental, to increase the understanding of the fiber alloy composite. This important understanding is transferred into a MATLAB model using the partial differential equation toolbox.

Moderated by: Hideyuki Yasuda