Experimental and numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing
Résumé
This work is a contribution to the understanding of the nonlinear shear behaviour caused by cell postbuckling in
Nomex honeycomb cores. First, an experimental benchmark study was made of different designs for the shear
testing of honeycomb cores. Then, several test specimens were fabricated and tested, a 3D DIC system being used
to measure and record the displacements. An Artificial Neural Network (ANN) was also used to identify the onset
of bucking and collapse of the cells. The influence of the overall boundary conditions of shear tests on the
buckling of the cells is presented both experimentally and numerically. The reversibility and test procedure
results suggest that it may be possible to allow the shear strength to be increased by up to 35% under certain
conditions.
Origine : Fichiers produits par l'(les) auteur(s)
Loading...