FEA of Ultrasonic‐Guided Waves in Curved Multi‐Stiffened Composite Panel

This study presents a numerical analysis of guided ultrasonic wave propagation in a curved composite plate reinforced with multiple stiffeners, using the finite element method. The primary objective is to evaluate the wave propagation characteristics and understand their interaction with the stiffening elements. The propagation mechanisms of the ultrasonic waves were analyzed in detail, focusing on their interactions with the geometry of the reinforcement. The results reveal significant directional variation in wave propagation, which is influenced by the reinforcement distribution. The interaction of guided waves with stiffeners introduces mode conversion and scattering effects, impacting wave velocity and attenuation. Subsequently, three damages were simulated in different locations and identified using the SAFES damage detection algorithm. These results provide valuable insights into the complex dynamics of wave propagation in reinforced composite structures, with potential implications for the design and optimization of structural health monitoring systems.