Cargando…

Mechanisms of Shock Dissipation in Semicrystalline Polyethylene

Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock...

Descripción completa

Detalles Bibliográficos
Autores principales: Mikhail, John P., Rutledge, Gregory C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10650820/
https://www.ncbi.nlm.nih.gov/pubmed/37959945
http://dx.doi.org/10.3390/polym15214262
_version_ 1785135868923609088
author Mikhail, John P.
Rutledge, Gregory C.
author_facet Mikhail, John P.
Rutledge, Gregory C.
author_sort Mikhail, John P.
collection PubMed
description Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock wave energy in a realistic, united atom (UA) model of semicrystalline polyethylene. Systems characterized by different levels of crystallinity were simulated using equilibrium molecular dynamics with a Hugoniostat to ensure that the resulting states conform to the Rankine–Hugoniot conditions. To determine the role of structural rearrangements, order parameters and configuration time series were collected during the course of the shock simulations. We conclude that the major mechanisms responsible for the storage and dissipation of shock energy in semicrystalline polyethylene are those associated with plastic deformation and melting of the crystalline domain. For this UA model, plastic deformation occurs primarily through fine crystallographic slip and the formation of kink bands, whose long period decreases with increasing shock pressure.
format Online
Article
Text
id pubmed-10650820
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-106508202023-10-30 Mechanisms of Shock Dissipation in Semicrystalline Polyethylene Mikhail, John P. Rutledge, Gregory C. Polymers (Basel) Article Semicrystalline polymers are lightweight, multiphase materials that exhibit attractive shock dissipation characteristics and have potential applications as protective armor for people and equipment. For shocks of 10 GPa or less, we analyzed various mechanisms for the storage and dissipation of shock wave energy in a realistic, united atom (UA) model of semicrystalline polyethylene. Systems characterized by different levels of crystallinity were simulated using equilibrium molecular dynamics with a Hugoniostat to ensure that the resulting states conform to the Rankine–Hugoniot conditions. To determine the role of structural rearrangements, order parameters and configuration time series were collected during the course of the shock simulations. We conclude that the major mechanisms responsible for the storage and dissipation of shock energy in semicrystalline polyethylene are those associated with plastic deformation and melting of the crystalline domain. For this UA model, plastic deformation occurs primarily through fine crystallographic slip and the formation of kink bands, whose long period decreases with increasing shock pressure. MDPI 2023-10-30 /pmc/articles/PMC10650820/ /pubmed/37959945 http://dx.doi.org/10.3390/polym15214262 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mikhail, John P.
Rutledge, Gregory C.
Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title_full Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title_fullStr Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title_full_unstemmed Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title_short Mechanisms of Shock Dissipation in Semicrystalline Polyethylene
title_sort mechanisms of shock dissipation in semicrystalline polyethylene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10650820/
https://www.ncbi.nlm.nih.gov/pubmed/37959945
http://dx.doi.org/10.3390/polym15214262
work_keys_str_mv AT mikhailjohnp mechanismsofshockdissipationinsemicrystallinepolyethylene
AT rutledgegregoryc mechanismsofshockdissipationinsemicrystallinepolyethylene