Abstract
Composite materials have experienced great development in recent years, replacing traditional materials. Designed as metastructures, their properties recommend them in different fields, from sports materials to those in aeronautic and energy industries. In combinations of metallic layers or composites based on carbon/glass fibers, the properties of these materials allowed both the miniaturization of devices and the construction of large lightweight components. The paper aims to present the results of the tensile evaluation of the glass fiber reinforced plastics (GFRP), used in the construction of wind turbine blades. The blades are the most critical components of the wind turbines, being exposed to the damage and the defects that appear during operation can lead to the loss of the integrity of the blade structure. In order to increase the lifetime and to study the defects during operation, tensile tests were performed to determine the mechanical properties on a dry specimen, reinforced at [0 ° / 90 °], and the results obtained were compared with two specimens subjected to immersion in water for 14 and 21 days, two other specimens were immersed in seawater (Black Sea) for 14 and 21 days and one specimen was immersed in liquid nitrogen for 4 days.
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