Micro-RVE modeling of mechanistic response in porous intermetallics subject to weak and moderate impact loading
Abstract
In this article we propose macroscopic (continuum) simulation schemes to predict response of porous heterogeneous material systems subjected to weak and moderate impact velocities. The proposed simulation model includes (1) an equation of state for porous solids that describes the evolution of porosity in the material as a function of shock pressure and, (2) a macroscopic rate dependent plasticity model for the porous composite that accounts for the deviatoric strength of the material at weak to moderate shock strengths. In addition, the numerical scheme employs cold-mixture theory to predict shock response of porous intermetallics. The material model is validated using gas-gun impact experiments on Ni/Al Intermolecular Reactive Composite (IRC) at 70% TMD. The proposed model is also used to understand the effect of microstructure on the material response predictions. (C) 2013 Elsevier Ltd. All rights reserved.
Keywords
Porous material; Heterogeneous material; Energetic material; Impact modeling; Finite elements; DYNAMIC PORE-COLLAPSE; EQUATION-OF-STATE; SOLIDS; DEFORMATION; FORMULATION; COMPACTION; SIMULATION; HUGONIOT
DOI
10.1016/j.ijplas.2013.06.009
Date of this Version
12-2013
Recommended Citation
Nair, A R.; Mason, B A.; Groven, L J.; Son, S F.; Strachan, A; and Cuitino, A M., "Micro-RVE modeling of mechanistic response in porous intermetallics subject to weak and moderate impact loading" (2013). Birck and NCN Publications. Paper 1556.
http://dx.doi.org/10.1016/j.ijplas.2013.06.009