An Analysis of Fibre Bragg Grating Strain and Induced Strain on Composite Materials

Obaje S. Peter, Anthony M., Agbon E. E., Iyobhebhe M.

Abstract


This research presents an analysis of Fibre Bragg Grating (FBG) strain and induced strain on composite materials. Composite materials have obtained a great recognition in establishment such as telecommunication, spacecraft, oil and gas, marine, automotive, civil infrastructure, power industries and sport equipment, owing to their exceptional mechanical properties. Composites result from the combination of two or more different materials in an attempt to form a single material that has enhanced mechanical properties when compared to the individual properties of the constituting materials. However, during use, composite materials are subjected to loading and low-velocity impacts that can result in Barely Visible Impact Damage (BVID). In this research, the FBG strain was analyzed with that of the induced strain on Toray Carbon Fibre America composite material. Two FBGs models were examined in this work: the FBG with enhanced sensitivity (iFBG) and the conventionalFBG. The simulation result shows that there is a linear relationship between the FBG strain and the induced strain on the composite material from the surrounding. Which implies that as induced strain on the composite material increases or decreases it reflects on the FBG strain which makes it suitable for monitoring the effect of physical parameters on composite materials. Furthermore, the FBG with enhanced sensitivity achieved 32.09% increment in FBG strain over the existing FBG

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