A MESOMECHANICAL MODELING OF POROUS ALUMINUM UNDER DYNAMIC LOADING - COMPARISON EXPERIMENT-CALCULATION

Citation
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
Citations number
16
Categorie Soggetti
Physics
Journal title
ISSN journal
11554339
Volume
7
Issue
C3
Year of publication
1997
Pages
643 - 648
Database
ISI
SICI code
1155-4339(1997)7:C3<643:AMMOPA>2.0.ZU;2-C
Abstract
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.