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Title: Hot spot and temperature analysis of shocked hydrocarbon polymer foams using molecular dynamics simulation

Hydrocarbon polymers, foams and nanocomposites are increasingly being subjected to extreme environments. Molecular scale modeling of these materials offers insight into failure mechanisms and complex response. Prior classical molecular dynamics (MD) simulations of the principal shock Hugoniot for two hydrocarbon polymers, polyethylene (PE) and poly (4-methyl-1-pentene) (PMP) have shown good agreement with density functional theory (DFT) calculations and experiments conducted at Sandia National Laboratories. We extended these results to include low-density polymer foams using nonequilibrium MD techniques and found good quantitative agreement with experiment. Here, we have measured the local temperature during void collapse to investigate the formation of hot spots and their relationship to polymer dissociation in foams.
Authors:
; ;
Publication Date:
OSTI Identifier:
1063425
Report Number(s):
SAND2013-0063J
Journal ID: ISSN 0927-0256
DOE Contract Number:
AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Computational Materials Science; Journal Volume: 79; Journal Issue: C
Publisher:
Elsevier
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE Molecular dynamics simulation; Shock; Polymer foam; Hot spot; Temperature; Dissociation