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Viscoelastic layer insertion to reduce the propagation of energy by vertical impacts on Glass Fiber Reinforced Plastic (GFRP) Laminates

Abstract:

The insertion of a viscoelastic layer is proposed to mitigate damage by vertical impact. For this purpose, unmodified GFRP panels and others modified with the viscoelastic sheet are made. With the use of an accelerometer, the force of the vertical impacts due to weight drop on the panels is measured, in order to quantify the critical points of damage. The absorbed energy is obtained through the mathematical formulation developed for this purpose. Damage is observed qualitatively by characterizing with penetrating inks to establish a comparison between viscoelastic-modified panels and non-modified panels. Impact force versus time curves are presented to assess damage mitigation in the GFRP. The benefits of the modification are evaluated, and its protection to the laminate is checked.