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...
Autores principales: | , |
---|---|
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 |