Displacement Measurement Technique for Beam Kinematics

François Hild (1) , Stéphane Roux (1) , Renaud Gras (1, 2) , Néstor Guerrero (2) , Maria Eugenia Marante (2) , Julio Florez-Lopez (2)

1 LMT - Laboratoire de Mécanique et Technologie
2 Department of Structural Engineering

It is proposed to develop a digital image correlation procedure that is suitable for beams whose kinematics is described by an Euler-Bernoulli hypothesis. As a direct output, the degrees of freedom corresponding to flexural and axial loads are directly measured. The performance of the correlation algorithm is evaluated by using a picture of a cantilever beam experiment. One load level is analyzed with the present algorithm. The latter is validated by comparing the displacement field with that given by a finite element based correlation algorithm. It is also shown that a locally buckled zone is detectable with the present procedure.

Mots clés: Beam flexure; Digital Image Correlation; generalized degrees of freedom; integrated approach; post-processing

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

François Hild, Stéphane Roux, Renaud Gras, Néstor Guerrero, Maria Eugenia Marante, et al.. Displacement Measurement Technique for Beam Kinematics. Optics and Lasers in Engineering, 2009, 47, pp.495-503. ⟨10.1016/j.optlaseng.2008.03.006⟩. ⟨hal-00322196⟩