Lateral indentation of a thin elastic film
Résumé
Indentation is a standard, widely used technique in mechanical assays and theoretical analysis. It unveils the fundamental modes of deformation and predicts the response of the material under more complex loads. Here we present an experimental setup for testing thin-film materials by studying the lateral indentation of a narrow opening cut into a film, triggering a cascade of buckling events. The force response F is dominated by bending and stretching effects for small displacements and slowly varies with indenter displacement $F\sim d^{2/5}$ , to finally reach a wrinkled state that results in a robust nonlinear asymptotic relation, $F\sim d^4$. Experiments with films of various thicknesses and material properties, and numerical simulations confirm our analysis and help to define an order parameter that accounts for the different response regimes observed in experiments and simulations.
Fichier principal
Paper_SM.pdf (821.31 Ko)
Télécharger le fichier
teaser.jpg (199.42 Ko)
Télécharger le fichier
ESI.pdf (4.02 Mo)
Télécharger le fichier
Video1_4x.mp4 (4.3 Mo)
Télécharger le fichier
Video2_4x.mp4 (4.02 Mo)
Télécharger le fichier
Video3.mp4 (315.33 Ko)
Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Format : Figure, Image
Commentaire : Electronic supplementary material
Format : Vidéo
Format : Vidéo
Format : Vidéo