Analysis of nonlinear behavior on honeycomb cores

Juan de Dios Rodriguez-Ramirez (1) , Bruno Castanié (1) , Christophe Bouvet (1)

1 ICA - Institut Clément Ader

This work presents the results of 21 shear tests on three types of honeycomb cores: the HRH-78-3/16-3.0, HRH-10-3/16-6.0 and an aluminium honeycomb core made of 5052 alloy with 3/8" cells. First, a benchmark of the different designs for shear testing of the honeycomb cores is made. Then, several double lap specimens were fabricated and tested while a 3D image correlation system was used to record the tests. An experimental analysis of the post-buckling phenomena of the HRH-78 W is presented. An artificial neural network is developed and used to visually identify the buckles of the test specimens. Finally, a detailed description of the behaviour of the structure including the postbuckling scenario is presented.

Mots clés: Honeycomb; Shear testing; Buckling; Artificial neural network

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

Juan de Dios Rodriguez-Ramirez, Bruno Castanié, Christophe Bouvet. Analysis of nonlinear behavior on honeycomb cores. 21st International Conference on Composite Materials ( ICCM 21 ), Aug 2017, Xi’an, China. ⟨hal-02177061⟩