Abstract
Poisson's ratio values of orthotropic FRP (Fibre Reinforced Plastics) plates were determined using the laser interferometry technique. The variation of Poisson's ratio was measured as a function of moisture content and glass fibre content (both in percentage weight) in the FRP plates, using this technique. The holographic test set up specifically fabricated to make the above measurements is described in the paper. Poisson's ratio of these composite plates increased as their moisture content increased and decreased as the fibre loading increased. It was concluded that the laser interferometry technique offered a very useful and reliable tool to determine the Poisson's ratio of orthotropic FRP plates with varied compositions.
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