Penetration Physics at the Meso-Scale
Abstract
This effort focused on understanding the underlying physics through a multi-scale computational approach to quantify penetrator performance into particulate geologic materials at impact velocities up to 1,500 m/sec. The computational approach employed an explicit, updated Lagrangian finite element formulation that performed 2-D plain strain and axisymmetric analyses of multi-body systems subjected to shock wave loading. To capture the particulate response, a simple elastic-plastic constitutive model was used to represent the discretized grain behavior while relying on a parallel processing computing platform to capture the evolution of the penetrator/media interaction. The penetrator was modeled as an elastic body. Computational results showed the affects of impact velocity on projectile stability/trajectory and the influence of intergranular friction. The influence of nose geometry on penetrator stability and trajectory was also modeled and quantified by tracking the resultant force vector on an ogive, cylindrical, and blunt nosed penetrator during penetration into a granular body with a 0.3 friction coefficient and 30 percent porosity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 2009
- Accession Number
- ADA511357
Entities
People
- Conrad W. Felice
- Y. M. Gupta
Organizations
- Washington State University