Abstract:
Airbus Helicopters has succeeded to validate a numerical bird model based on the Smooth Particle Hydrodynamics method with the explicit dynamic finite element code RADIOSS®. For that purpose, the so-called building block approach was followed, based on numerous successive comparisons between simulation results and test measurements on increasing complex assemblies (rigid or deformable targets, metallic or composites parts). A satisfying level of predictability was obtained, proving that the code is able to capture the fluid-structure interaction, failure modes, impact loads and strains levels. Based on these studies, modelling methods have been defined. However, the accuracy of those highly complex simulations depend on extensive materials characterization test campaigns to develop the appropriate numerical models, and their domain of validity must be precisely defined.