Volume 1, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||355 - 361|
|Published online||15 September 2009|
Dynamic optical technique applied to define the zone of 3D and transient effects during dynamic crack propagationsS. Hedan, V. Valle and M. Cottron
Université de Poitiers, Laboratoire de Mécanique des Solides – UMR 6610, 86962 Futuroscope Chasseneuil, France
Published online: 15 September 2009
The aim of this paper is to define the evolution of the out-of-plane displacement fields during a crack propagation on a SEN sample made in a brittle material (PMMA). This problem consists of determining the zones of difference between the theoretical formulation and the experimental out-of-plane displacements. In the literature, this zone is named zone of 3D effects and transient effects. To obtain the information of dynamic displacements around the tip and during crack propagation, Michelson interferometer is used and the interferograms are recorded by an ultra high speed CCD camera. The PMMA plate is a SEN sample and the material behavior is brittle. Comparisons between experimental data and theoretical formulations allow us to size the gap zone. The evolutions are studied according to the applied loading and the crack speed.
© EDP Sciences 2009