Macro-meso models for joint submitted to pyrotechnic shock

Pierre-Alain Boucard (1) , Marc Derumaux (1) , Pierre Ladevèze (1) , Philippe Roux (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 CNES - Centre National d'Études Spatiales [Toulouse]

This chapter presents the propagation of pyrotechnical shocks in complex structures and through joints between the stages of the Ariane 5 space launcher. As it is a failure cause for satellite equipment, the National Center for Spatial Studies is interested in predicting the hardness levels of the shock. A computational difficulty appears near joints as the phenomena deeply depend on fine geometrical and mechanical details that cannot be taken into account in the whole structure model. To carry out the calculation, a two scales strategy is used: a structure scale where the joint appears as a nonlinear interface between two shells, depending on a few parameters, and a mesoscopic scale dedicated to the joint where each detail and local physical phenomena can be integrated.

Mots clés: Dynamic; Propagation; Joint; Macro-model; Multi-scale; Identification; Condensed model; Industrial context

Domaines: Mécanique des structures [physics.class-ph]

Pierre-Alain Boucard, Marc Derumaux, Pierre Ladevèze, Philippe Roux. Macro-meso models for joint submitted to pyrotechnic shock. 2d MIT Conference on Computational Fluid and Solid Mechanics, 2003, Boston, United States. pp.139-142, ⟨10.1016/B978-008044046-0.50036-1⟩. ⟨hal-01987887⟩