Modeling and characterization of mechanical and energetic elastoplastic behavior of lattice structures for aircrafts anti-icing systems

Abstract

The design of lattice structures for additive manufacturing processes requires dedicated methods and tools able to reduce the computational heaviness of simulation and to predict accurately the global strength and strain energy dissipation and the stress distribution. Additionally, geometrical-related stress intensifications lead to local yielding regions and related plastic hinges which contribute to the deformation mechanisms. The use of cellular materials in heavy loaded structures has important role in lightered and hybrid components for aircrafts. In this paper, lattice structures are used as impact absorbers in aircrafts anti-icing systems to efficiently dissipate the kinetic energy. Some variants of lattice structures are analyzed by numerical simulations and experimental characterizations in the elastoplastic regime with the goal to correlate the equivalent material density, the structural strength, and the strain energy dissipation to cells shapes and dimensions.