Bulletin of the American Physical Society
22nd Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter
Volume 67, Number 8
Monday–Friday, July 11–15, 2022; Anaheim, California
Session W04: Energetic Materials Behavior II
4:00 PM–5:30 PM,
Thursday, July 14, 2022
Anaheim Marriott
Room: Platinum 2
Chair: Joshua Felts, NSWC Crane
Abstract: W04.00006 : Large deformation GnarlyX hydrocode simulations of the drop weight impact experiment*
5:15 PM–5:30 PM
Presenter:
Roseanne M Cheng
(Los Alamos National Laboratory)
Authors:
Roseanne M Cheng
(Los Alamos National Laboratory)
Milovan Zecevic
(Los Alamos National Laboratory)
Jeremiah Moore
(Los Alamos National Laboratory)
Marc J Cawkwell
(Los Alamos National Laboratory)
Virginia W Manner
(Los Alamos National Laboratory)
chemical reactions in drop weight impact experiments which have been studied for several
decades. In these experiments, a hammer with drop velocity ~1 m/s delivers energy to a 40 mg
sample over hundreds of microseconds and converts kinetic energy to thermal energy that can
initiate reactions in the explosive with an audible deflagration. Large deformation and heat
generation in the sample critically depend on the material properties of the HE although the exact
thermomechanical conditions which lead to a “Go” or “No-Go” are unclear. Our approach
toward identifying the leading mechanisms in this complex system is through multi-physics
hydrocode modeling of new transparent anvil drop weight impact experiments under
development at LANL. We use GnarlyX, a LANL hydrocode for large deformation
thermomechanics, to generate a suite of multi-material and strength hydrodynamics simulations
of the dynamic response of the HE to impact. In developing material models with increasing
complexity, we consider the thermomechanical conditions which lead to high temperature
distributions within the sample.
*This work was supported by the Laboratory Directed Research and Development program under projectnumber 20220068DR and the Advanced Simulation and Computing Physics and Engineering Modelsprogram of Los Alamos National Laboratory. Los Alamos National Laboratory is operated by TriadNational Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy(Contract No. 89233218CNA000001).
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