Monday, May 13th, & Tuesday, May 14th, 2024
The fragmenting munitions material characterization symposium seeks to bring together subject matter experts who are involved in explosively driven fragmentation problems. The focus will be on the experimental characterization of metals and constitutive material model development and fitting. The goal is for attendees and participants to gain a better understanding of current on-going work, best practices, methods, and tools available for experimental and computational material characterization and the subsequent influence on munition models. In addition, we seek to facilitate discussion on the future directions of the research to better coordinate efforts and advance the state of the art.
What material models work best for naturally fragmenting munitions? Does the material model matter?
Best test methods for characterizing materials for munitions? How do you fit experimental data for modeling?
What physics are important to capture in the material model? Euler vs Lagrange: When do you use them?
Focus Area 1:
Experimental Characterization of Metals at High Strain Rates
Hopkinson Bar Testing – Current test methods and new sample geometries
Saryu Fensin, Los Alamos National Labs
Hopkinson Bar Testing of Ductile Cast Iron
Chris Meredith, Army Research Lab
TBD High-Rate Testing
Bo Song, Sandia National Laboratories
Focus Area 2:
Computational Approaches to Material Modeling and Fragmentation
Material Model Calibration of Ductile Cast Iron
Rebecca Nylen, Sandia National Labs
Fracture Models and Natural Fragmentation
Matthew Neidigk, AFRL/RWMAC
Calibration of Metal Plasticity and Ductile Failure Models for use at High Strain Rates
Edmundo Corona, Sandia National Laboratories
Non-local Failure Modeling
Michael Hopson, NSWC-Dahlgren
Trend Analysis of Fragment Size with Johnson-Cook Failure
Will Elmer and Colton Ross, LLNL