Using Hydrodynamic Instabilities to Measure the Dynamic Strength of Polyurea at Extreme Pressures and
Abstract
Using Hydrodynamic Instabilities to Measure the Dynamic Strength of Polyurea at Extreme Pressures and Strain Rates 1. -Molecular Simulation of Polyurea at Extreme Pressure and Strain Rates- -Develop Hugoniot state calculations using quantum mechancs and molecular dynamics- -Develop Coarse-grained molecular modeling of the dynamic strength of polyuria2. -Large Deformation, Thermomechanical Modeling of Polyurea- -Transition of Coarse-Grained Models to Continuum Constitutive Description- -Implementation of Constitutive Models for Large Scale Numerical Analysis3. -Development of Dynamic Strength Experiments for ElastomersThe experiments will be performed at Los Alamos National Lab, using the TRIDENT laser facility at LANL. In second and third year, PI is exploring the use of Laboratory for Laser Energetics (LLE) at the University of Rochester to use its OMEGA and OMEGA EP lasers. Further activities associated with these experiments are:- -Computational design of specimens (baseline response of the samples to an ablative Richtmyer-Meshkov (RM) instability) and running simulations of the experiment.- -Specimen fabrication: Uniform and defect free samples- -Dynamic strength experiments utilizing hydrodynamic instabilities- -Measurements of the hydrodynamic instabilities in the elastomer under dynamic loading and counts with of dual Line VISAR diagnostic, which will be used to characterize the rippled shocks.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 21, 2018
- Source ID
- N000141612532
Entities
People
- Jay Oswald
Organizations
- Arizona State University
- Office of Naval Research
- United States Navy