Effect of Grain Scale Properties on Bulk Deformation of Granular Deposits Due to High Speed Projectile Impact
Abstract
In order to understand the behavior of granular deposit subjected to high-speed projectile impact, we perform some experiments and grain-scale numerical simulations. In the high-speed impact experiment, we adopted a new technology to measure the deceleration of projectile after penetrating into sand layer. The observed results together with simple one-dimensional model with Rankine-Hugoniot equations suggests the importance of grain-scale mechanics such as grain crushing to evaluate the evolution of material parameters. Then a series of numerical simulation using Discrete Element Method were performed and the compression behavior of granular materials was analyzed in terms of grain crushing. The results suggest the transition of three material phases; (1) elastic regime as a granular matter, (2) plastic regime due to grain crushing, and (3) Hugoniot solid regime, and they are the important ingredients for modeling the equation of state of granular materials subjected to high speed compression.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 2012
- Accession Number
- ADA570567
Entities
People
- Takashi Matsushima
Organizations
- University of Tsukuba