Direct strain and slope measurement using 3D DSPSI

Jérôme Molimard (1, 2, 3, 4) , Wajdi Dandach (5, 6) , Pascal Picart (7)

1 CIS-ENSMSE - Centre Ingénierie et Santé
2 STBio-ENSMSE - Surfaces et Tissus Biologiques
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 IFRESIS - Institut Fédératif de Recherche en Sciences et Ingénierie de la Santé
5 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
6 SMS-ENSMSE - Centre Science des Matériaux et des Structures
7 LAUM - Laboratoire d'Acoustique de l'Université du Mans

This communication presents a new implementation of DSPSI. Its main features are 1. an advanced model taking into account the beam divergence, 2. the coupling with a surface shape measurement in order to generalize DSPSI to nonplanar surfaces 3. the use of small shear distance made possible using a precise measurement procedure. A first application on a modified Iosipescu shear test is presented and compared to classical DIC measurements.

Mots clés: beam divergence; DSPSI; surface shape measurement; Iosipescu shear test; OFFT; shearography

Domaines: Génie des procédés; Optique / photonique; Optique [physics.optics]

Jérôme Molimard, Wajdi Dandach, Pascal Picart. Direct strain and slope measurement using 3D DSPSI. PhotoMechanics 2013, May 2013, Montpellier, France. ⟨hal-00842895⟩