Comportement des matériaux cellulaires sous sollicitations dynamiques. Partie 2 : approche multi-échelles
Article dans une revue avec comité de lecture
JournalMécanique et Industries
A multi scale methodology is proposed for the study of the cellular material behavior under dynamic loading. The behavior of polymeric foams studied depends on the constitutive material and the morphology of the porous structure. The cellular material of this study is constituted of millimetric porous beads, these beads are themselves constituted of microscopic closed cells. The methodology proposed to model the multi scale morphology of the structure (the scales of beads and cells) of the cellular material; it consists in implementing simple mechanical models at the different scales to reproduce the complex physical phenomenon observed and to model the macroscopic response of the foam. The observation and the analysis of physical phenomenon is the first step of the multi scale modeling. This paper describes the experimental and numerical methods used to observe and describe the structure of the cellular material, and quantify deformations and damages of these structures at the scales of beads and cells. Two ways of modeling were investigated: a finite-element model to represent the bead structure and another approach, more original, by the use of a modified discrete element model to model the microscopic structure of the cells.
Files in this item
Showing items related by title, author, creator and subject.
Communication avec acteGUILLAUD, Nicolas; FROUSTEY, Catherine; DAU, Frédéric; VIOT, Philippe; LATAILLADE, Jean-Luc (2013)This study concerns Carbon / epoxy composite plates. Three di erent thickness were investigated ([0°=45°=90°=45°]i)S for i = 2, 3 or 4 (5, 10 and 15mm thick). An instrumented falling-weight-impact test machine was used for ...
Article dans une revue avec comité de lectureGUILLAUD, Nicolas; FROUSTEY, Catherine; DAU, Frédéric; VIOT, Philippe (Elsevier, 2014)This work focuses on the impact response of composite plates 5 mm thick subjected to uniaxial tension preload. Laminated carbon/epoxy with quasi-isotropic stacking sequence ([0/45/90/-45]2)S samples were used. Doehlert-type ...
Article dans une revue avec comité de lectureBALLERE, Ludovic; VIOT, Philippe; LATAILLADE, Jean-Luc; GUILLAUMAT, Laurent; CLOUTET, S (Elsevier, 2008)The final aim of this study is to evaluate the influence of impact damage on the residual strength of carbon/epoxy vessels stressed by internal pressure. An intermediate stage determined the residual behaviour of pre-impacted ...
Article dans une revue avec comité de lectureANTOINAT, Léonard; KUBLER, Régis; BAROU, Jean-Luc; VIOT, Philippe; BARRALLIER, Laurent (Elsevier, 2015)Low velocity perforation of aeronautical aluminium alloy sheets 2024 T3 is studied in this paper. After a literature review on recent experiments and models of plate's perforation, experimental results for 2 thicknesses ...
Study of the dynamic fracture of hollow spheres under compression using the Discrete Element Method Article dans une revue avec comité de lectureCORE, Arthur; KOPP, Jean-Benoit; GIRARDOT, Jérémie; VIOT, Philippe (ESIS - Elsevier, 2018)Hollow sphere structure (HSS) belongs to cellular solids that have been studied recently for its multiples properties. In our case, HSS aims to absorb soft impacts energy on an airliner cockpit. This structure is investigated ...