J. Phys. IV France
Volume 134, August 2006EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||379 - 384|
|Publié en ligne||26 juillet 2006|
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 379-384
Effects of liner grain size on shaped – charge jet performance: A combined experimental/numerical/analytical approachJ. Petit1, V. Jeanclaude2 and C. Fressengeas2
1 DGA Centre d'Études de Gramat, BP. 80200, 46500 Gramat, France
2 Laboratoire de Physique et Mécanique des Matériaux, Université Paul Verlaine - Metz/CNRS, Ile du Saulcy, 57045 Metz Cedex, France
Published online: 26 July 2006
Experimental data on the fragmentation of copper shaped-charge jets are presented. A combined numerical/analytical analysis is designed to describe shaped-charge jet break-up. The method overcomes drawbacks from exclusively numerical or analytical analyses, such as mesh sensitivity or oversimplified description. It yields predictions for break-up time, total number and cumulative length of fragments in fairly good agreement with the experimental data. The dependence of fragmentation characteristics in the liner grain size is well predicted, except for the leveling out of performances at very large grain size. A discussion is provided.
© EDP Sciences 2006