Evaluación de la curvatura del laminado en la resistencia interlaminar de embarcaciones interislas de GFRP

Abstract

CONDITION FOR PROJECT PUBLICATION. This project analyzes the interlaminar behavior of GFRP laminates used in inter-island vessels, with the objective of determining the influence of curvature on their mechanical response. It is hypothesized that geometry modifies strength, energy dissipation, and damage propagation. This research is justified by the need to optimize the structural design of hulls subjected to dynamic loads in marine environments. The study was conducted using a comparative experimental approach. Flat and curved specimens were manufactured through lamination and controlled consolidation techniques. Blade Pressure tests were performed using a universal testing machine, applying principles of fracture mechanics and the cohesive zone model, following standardized procedures. The results indicated that flat laminates reached higher fracture energy values, maximum shear stress, and load-carrying capacity, whereas curved laminates exhibited lower strength, reduced interlaminar separation, and a more gradual damage propagation. Additionally, greater dispersion in cohesive zone length was observed in flat laminates. Micrographic analysis revealed more brittle failure mechanisms in flat specimens and more stable damage processes in curved ones. It is concluded that laminate geometry significantly influences interlaminar strength, failure mode, and structural durability; therefore, its selection is essential for the efficient and safe design of naval hulls. Keywords: Composite Materials, Fracture Energy, Cohesive Zone, Geometry.