Mechanical properties of crimped mineral wools: Identication from digital image correlation

Jean-François Witz (1, 2) , Stéphane Roux (1) , François Hild (1) , Jean-Baptiste Rieunier (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 CRIR - Centre de Recherche Isover de Rantigny

Crimped mineral wools are characterized by a strongly anisotropic microstructure, whose local preferential orientation is highly heterogeneous. It is proposed to identify the local anisotropic elastic behavior through a combination of different tools based on image analysis. First, the local orientation map is determined from a reference image. Second, a series of images captured at different loading stages is analyzed with a digital image correlation code to estimate the displace- ment field. Last, an inverse analysis is applied to evaluate the four elastic moduli of the local elastic properties. This procedure is tested against a set of experimental data on mineral wool with different crimping structures.

Mots clés: Anisotropic media; finite element updating; image processing; mineral wool

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

Jean-François Witz, Stéphane Roux, François Hild, Jean-Baptiste Rieunier. Mechanical properties of crimped mineral wools: Identication from digital image correlation. Journal of Engineering Materials and Technology, 2008, 130, pp.021016-1-7. ⟨10.1115/1.2884575⟩. ⟨hal-00322194⟩