Planing hull vessel built with polymer matrix laminates and fiberglass reinforcements (GFRP) suffer structural damage due to the phenomenon of slamming during navigation, due to the impact of the boat hull on the free surface of the water at high speed. A modification in the manufacture of the laminates for these fast boats is proposed, consisting of the insertion of an additional layer of a hybrid material, formed by elastomer encapsulated in an ABS polymer cell. Using GFRP specimens made from pre-impregnated material and reproducing the characteristic impacts of slamming, it is possible to compare the modified material with the introduction of the viscoelastic layers with the response under the same conditions as the unmodified laminates. Additionally, the panels have been tested using impacts due to weight drop at different energies, which allow determining the material damage threshold as a function of the energy absorbed, and to establish a comparison with the GFRP panels modified by observation in fluorescent light. It is verified that the proposal to reduce the effect of these impacts on the generation of damage to the material and its progression throughout the service life of the vessel is effective.
A laboratory methodology is proposed, which allows to evaluate the evolution of intralaminar and interlaminar damage, for the hull of vessels built with reinforced polymer and fiberglass -(GFRP) modified viscoelastically, subjected to low energy impacts reproducing the blow of slamming during your navigation at half speed. The method proposes the reproduction of the phenomenon with the equipment designed for this purpose, analyzing the energy absorbed and the energy returned based on the results obtained by vertical impacts of the same energy level. Interlaminar and intralaminar delaminations are visually appreciated and correlated with the results obtained through the use of image analysis software. The deformations have been evaluated with strain gauges supported by the respective mathematical formulation. The advances in the use of new generation viscoelastic layers and their future perspectives are shown.
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