Bird-striking damage of rotating laminates using SPH-CDM method

Abstract

Bird strike represents a major hazard to civil aviation. In this paper, impact damage under high velocity is numerically investigated by means of non-linear explicit finite element analysis. We mainly focus the influence of rotational speeds on damage modes and energy variations of bird impact on a circular laminated plate. The Smoothed Particle Hydrodynamics method and an equation of state were employed for the bird projectile. A Continuum Damage Mechanics approach has been applied to simulate failure initiation and damage evolution in unidirectional composite laminates. Hashin's failure initiation criteria have been employed to be able to distinct lamina failure modes. Two damage regimes are identified with respect to the rotational speeds, i.e. impact-dominated damage and rotation-dominated damage. A threshold rotational speed exists for the rotating thin plate in terms of damage regimes. The results can serve as design guidelines in future full-scale or part-scale study of rotating laminated structures.