F. Collombet et al., A MESOMECHANICAL MODELING OF POROUS ALUMINUM UNDER DYNAMIC LOADING - COMPARISON EXPERIMENT-CALCULATION, Journal de physique. IV, 7(C3), 1997, pp. 643-648
The purpose of this work is to demonstrate the validity of a model bas
ed on a method of homogenization (Mori and Tanaka's method) to study t
he shock-wave behavior of 8.2% porous aluminum. At low stresses (below
2 GPa), the macroscopic response of this material is influenced by th
e coupling between matrix plasticity and void collapse under stress tr
iaxiality. The model is validated through the comparison of numerical
simulations to an interferometric measurement performed during a plate
impact test. For this approach, the satisfactory restoration of the e
xperimental profile by the proposed model depends on the physical anal
ysis of local events.