Modeling impact on aluminium sandwich including velocity effects in honeycomb core

Amélie Kolopp (1) , Raquel Alvarado (1) , Samuel Rivallant (1) , Christophe Bouvet (1)

1 ICA - Institut Clément Ader

A numerical model has been developed on metallic sandwich structures as an armor for aeronautical applications. Several combinations of AA5086-H111 aluminium skins and aluminium honeycomb core have been studied, considering medium-velocity and highenergy impacts. The aim is to establish links between the sandwich performances and the material and geometrical parameters. An elasto-plastic, strain-rate dependent behavior has been implemented to represent the skins and the core. The sandwich model has been calibrated and validated from the experimental data. Dynamic effects, as well as strong couplings between the skins and the core appear to have a significant effect on the target performance.

Mots clés: Impact; Metallic sandwich; Aluminium honeycomb; Experiments; Modeling

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

Amélie Kolopp, Raquel Alvarado, Samuel Rivallant, Christophe Bouvet. Modeling impact on aluminium sandwich including velocity effects in honeycomb core. Journal of Sandwich Structures and Materials, 2013, 13 (6), pp.733-757. ⟨10.1177/1099636213501102⟩. ⟨hal-01853146⟩