DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 295 - 301
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 295-301
DOI: 10.1051/dymat/2009041

Full-field strain measurements at high rate on notched composites tested with a tensile Hopkinson bar

R. Moulart1, F. Pierron1, S.R. Hallett2 and M.R. Wisnom2

1  Laboratoire de Mécanique et Procédés de Fabrication (LMPF – EA 4106), Arts et Métiers ParisTech, 51000 Châlons-en-Champagne, France
2  Advanced Composites Centre for Innovation and Science, University of Bristol, Queen's Building, BS8 1TR Bristol, UK

Published online: 15 September 2009

The present paper deals with full-field strain measurement on open-hole tensile specimens submitted to high strain rate through a Hopkinson bar device. After having briefly explained the methodology (using an Ultra-High speed camera), the strain results obtained on a first test are shown leading to a discussion on the non-uniform state of loading induced by the Hopkinson bar system. Then, a first attempt to identify stiffnesses on this dynamic case from only the strain and acceleration maps using the Virtual Fields Method is introduced. The results are extremely promising considering the limited quality of the measurements.

© EDP Sciences 2009