J. Phys. IV France
Volume 134, August 2006EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||305 - 310|
|Publié en ligne||26 juillet 2006|
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 305-310
Constitutive behaviors of a silicone rubber at high strain ratesFangyun Lu, Yuliang Lin and Li Lu
Scientific College, National Univ. of Defense Technology, Changsha, Hunan 410073, China
Published online: 26 July 2006
Silicone rubber is a macromolecule polymer, and can suffer a large deformation. In the paper, the silicone rubber specimens are tested at a series of strain rates by modified SHPB techniques. Based on the experimental data, a constitutive model of the silicone rubber is built up based on Ogden strain energy functions. An interesting phenomenon— localized damage cycle, so called lag circle— shows up in the tested specimen under high strain-rates loading. The diameters of the damage cycle are associated with strain-rate and specimen's size. A formulation about the relations between the diameter and the strain-rate, specimen's size is presented.
© EDP Sciences 2006