Damage law identification from full field displacement measurement: Application to four-point bending test for plasterboard

Amine Bouterf (1) , Stéphane Roux (1) , François Hild (1) , Guillaume Vivier (2) , Xavier Brajer (2) , Eric Maire (3) , Sylvain Meille (3)

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

Plasterboards are tested in four-point bending up to failure, and digital image correlation is used to follow the kinematics and the progressive degradation of the structure all along the test. Although numerous distinct core cracks are clearly observed, it is proposed to identify the behavior of plasterboard through a homogenized continuum description where the progressive degradation of the bending stiffness is described through a damage law. A specific procedure for the identification is presented where experimental imperfections and symmetry breakdown are accepted and accounted for. The identification procedure is shown to provide constitutive parameters with a very small variability.

Mots clés: Damage identification; Digital Image Correlation (DIC); Love-Kirchhoff kinematics

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

Amine Bouterf, Stéphane Roux, François Hild, Guillaume Vivier, Xavier Brajer, et al.. Damage law identification from full field displacement measurement: Application to four-point bending test for plasterboard. European Journal of Mechanics - A/Solids, 2015, 49, pp.60-66. ⟨10.1016/j.euromechsol.2014.06.001⟩. ⟨hal-01068546⟩