Digital image correlation used for mechanical tests on crimped glass wool samples

Sandra Bergonnier (1, 2) , François Hild (1) , Stéphane Roux (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 SVI - Surface du Verre et Interfaces

Mechanical compression and tearing tests are carried out on crimped glass wool samples. The displacement field is determined by using digital image correlation based on images taken at different stages of the mechanical tests. A multiscale algorithm is used to resolve accurately fine details of the displacement field. This technique reveals strain heterogeneities and further localisation in compression tests well below the peak stress. Crack formations are identified in tearing tests. Reliability and resolution of the displacement and strain fields are validated by using different window sizes in the correlation analysis.

Mots clés: Photomechanics

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

Sandra Bergonnier, François Hild, Stéphane Roux. Digital image correlation used for mechanical tests on crimped glass wool samples. Journal of Strain Analysis, 2005, 40 (2), pp.185-197. ⟨10.1243/030932405X7773⟩. ⟨hal-00013799⟩