The paper mainly concerns the mechanical response of 2D dry dense sand specimens under shock loading.
The problem is numerically analysed by means of a SEM dynamic code, within which an already conceived
non-local viscoplastic constitutive model characterized by a non-associated flow rule and by an anisotropic
strain hardening has been implemented. In particular the strain localization and time dependency of the
material mechanical response are taken into consideration.
Both rapid/static loading and dynamic histories are numerically simulated. In the first case, the time
dependency of the material mechanical response can be captured by neglecting inertial effects, while in the
second one the two factors are superimposed and the propagation of the stress waves within the specimen is
discussed. The interest of these analyses derives from the fact that the diffusion phenomenon takes place
within a specimen already localized