Experimental and numerical investigation of hollow spheres subjected to fracture

Abstract eng:
This paper deals with the characterization and the numerical modeling of a new core structure developed to absorb energy during a bird strike on an airplane cockpit. This technology is based on the inclusion of composite hollow spheres in a sandwich structure. An experimental crushing analysis is conducted on a single hollow sphere to quantify the energy dissipated by dynamic fracture. A numerical model based on the Discrete Element Method (DEM) is investigated to take into account the brittle behavior of the constitutive material. The DEM used shows an original approach to correctly describe the dynamic fracture of a spherical and thin structure.

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