Respuesta compresiva del comportamiento de placas auxéticas de segunda generación para cascos de barcos planeadores

Abstract

This project evaluates the compressive response of second-generation auxetic materials in fast craft hulls, focusing on energy absorption and structural integrity under dynamic loads and slamming events. The aim is to determine to what extent these structures enhance resilience, redistribute stresses, and preserve operational safety. Auxetic material, characterized by a negative Poisson’s ratio, enable lateral expansion during deformation and promote stress dispersion. This property Allows their use as layers or cores that smooth load peaks, reduce stress concentrations, and improve fatigue tolerance under high-speed operating conditions. For validation, epoxy resin cubes with 3D-printed auxetic inserts were manufactured. Ten compression tests were conducted in accordance with ASTM/ISO standards, measuring dissipated energy and thermal responses to characterize the interaction between materials and geometry, ensuring reproducibility and comparability across configurations. Results reveal increased energy dissipation and more homogeneous stress distribution in auxetic configurations, along with thermal variations compatible with heat management with compromising structural integrity. These findings support the feasibility of integrating auxetic layers to enhance robustness against dynamic loads, with potential benefits for safety and hull service life. In conclusion, second-generation auxetics demonstrate promising applicability for fast craft structure, establishing a foundation for full-scale validation and the development of specific hybrid-structure testing standards. Keywords: Second generation auxetics, dynamic loads, slamming, test specimens, naval application.