Identication of the Crushing Behavior of Brittle Foam: From Indentation to Oedometric Tests

Amine Bouterf (1, 2) , Jérôme Adrien (3) , Eric Maire (3) , Xavier Brajer (1) , Francois Hild (2) , Stéphane Roux (2)

1 SGR - Saint-Gobain Recherche
2 LMT - Laboratoire de Mécanique et Technologie
3 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

Compaction of the core of plasterboard is one of the limiting phenomena for its mechanical performance. This mechanism is studied herein in an indentation test. A cylinder made of foamed gypsum is indented in-situ in an X-ray lab tomograph with a sphere of millimeter radius. The reported experiments show that foamed plaster displays a sharp transition between an undamaged state (with linear elastic behavior) and a compacted state with collapsed porosity under the indenter. Tomographic acquisitions of the sample under load associated with a global version of Digital Volume Correlation allow displacement elds to be measured at dierent load levels. However, because of the heterogeneous nature of the indentation test, a ne spatial resolution of the displacement elds is required to measure the strains at the crush-* Corresponding Author. Fax: [phone]

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

Amine Bouterf, Jérôme Adrien, Eric Maire, Xavier Brajer, Francois Hild, et al.. Identication of the Crushing Behavior of Brittle Foam: From Indentation to Oedometric Tests. Journal of the Mechanics and Physics of Solids, 2017, 98, pp.181-200. ⟨10.1016/j.jmps.2016.09.011⟩. ⟨hal-01383929⟩