N. A. Apetre, B. V. Sankar, and A. D. , Low-velocity impact response of sandwich beams with functionally graded core, International Journal of Solids and Structures, vol.43, issue.9, pp.2479-2496, 2006.
DOI : 10.1016/j.ijsolstr.2005.06.003

W. S. Sanders and L. J. Gibson, Mechanics of hollow sphere foams, Materials Science and Engineering: A, vol.347, issue.1-2, pp.70-85, 2003.
DOI : 10.1016/S0921-5093(02)00583-X

H. B. Zeng, S. Pattofatto, H. Zhao, Y. Girard, and V. Fascio, Impact behaviour of hollow sphere agglomerates with density gradient, International Journal of Mechanical Science
URL : https://hal.archives-ouvertes.fr/hal-00443066

Y. Li, J. B. Li, and R. Q. Zhang, Energy-absorption performance of porous materials in sandwich composites under hypervelocity impact loading, Composite Structures, vol.64, issue.1, pp.71-78, 2004.
DOI : 10.1016/j.compstruct.2003.07.003

R. A. Mines, C. M. Worrall, and A. G. Gibson, LOW VELOCITY PERFORATION BEHAVIOUR OF POLYMER COMPOSITE SANDWICH PANELS, International Journal of Impact Engineering, vol.21, issue.10, pp.855-879, 1998.
DOI : 10.1016/S0734-743X(98)00037-2

H. Fatt, M. S. Park, and K. S. , Perforation of sandwich plates by projectiles, Composites: Part A: applied science and manufacturing, pp.31-889, 2000.

T. Shyr and Y. Pan, Low velocity impact responses of hollow core sandwich laminate and interply hybrid laminate, Composite Structures, vol.64, issue.2, pp.189-198, 2004.
DOI : 10.1016/j.compstruct.2003.08.006

T. Wierzbicki, A. De-lacruz-alvarez, H. Fatt, and M. , Impact energy absorption of sandwich plates with crushable core, Proceedings of the ASME/AMD Symposium, Impact Waves, and Fracture, pp.391-411, 1995.

H. Zhao, I. Elnasri, and Y. Girard, Perforation of aluminium foam core sandwich panels under impact loading???An experimental study, International Journal of Impact Engineering, vol.34, issue.7, pp.1246-1257, 2007.
DOI : 10.1016/j.ijimpeng.2006.06.011

G. Gary, J. R. Klepaczko, and H. Zhao, CORRECTION DE DISPERSION POUR L'ANALYSE DES PETITES D??FORMATIONS AUX BARRES DE HOPKINSON, Le Journal de Physique IV, vol.01, issue.C3, pp.1-403, 1991.
DOI : 10.1051/jp4:1991357

H. Zhao and G. Gary, Une nouvelle méthode de séparation des ondes pour l'analyse des essais dynamiques, série II, pp.987-992, 1994.

H. Zhao and G. Gary, Behaviour characterisation of polymeric foams over a large range of strain rates, International Journal of Vehicle Design, vol.30, issue.1/2, pp.135-145, 2002.
DOI : 10.1504/IJVD.2002.002028

URL : https://hal.archives-ouvertes.fr/hal-00116219

J. O. Hallquist, Ls-Dyna theoretical manual, Livermore Software Technology Corporation, 1998.

V. S. Deshpande and N. A. Fleck, Isotropic constitutive models for metallic foams, Journal of the Mechanics and Physics of Solids, vol.48, issue.6-7, pp.1253-1283, 2000.
DOI : 10.1016/S0022-5096(99)00082-4