Cargando…

Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates

In order to clearly explain the large deformation mechanical characteristics of polyurea under impact and to construct a dynamic model that can be used for finite element analysis, two kinds of polyurea materials were prepared by formula design, and their uniaxial tensile properties were tested with...

Descripción completa

Detalles Bibliográficos
Autores principales: Chen, Yu, Guo, Hui, Sun, Minqian, Lv, Xiao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9460922/
https://www.ncbi.nlm.nih.gov/pubmed/36080652
http://dx.doi.org/10.3390/polym14173579
_version_ 1784786866197757952
author Chen, Yu
Guo, Hui
Sun, Minqian
Lv, Xiao
author_facet Chen, Yu
Guo, Hui
Sun, Minqian
Lv, Xiao
author_sort Chen, Yu
collection PubMed
description In order to clearly explain the large deformation mechanical characteristics of polyurea under impact and to construct a dynamic model that can be used for finite element analysis, two kinds of polyurea materials were prepared by formula design, and their uniaxial tensile properties were tested with strain rates ranging from 10(−3)~10(3) s(−1) using an electronic universal testing machine and a split Hopkinson tensile bar (SHTB). The tensile stress–strain curves of polyurea were obtained under different strain rates. The difference in tensile mechanical properties of the materials was analyzed under dynamic loading and quasi-static loading. Based on the nonlinear viscoelastic theory and the energy dissipation rate inequality, a dynamic visco-hyperelastic constitutive model of polyurea elastomer was established. The research results showed that the uniaxial tensile stress–strain curves of two kinds of polyurea at different strain rates had obvious nonlinear characteristics and strain rate sensitivity and that their tensile strength increased with increased strain rate. The polyurea gradually changed from exhibiting rubbery mechanical behavior under quasi-static loading to glassy mechanical behavior under dynamic loading. The fitting analysis of experimental data and the results of finite element simulation showed that the dynamic constitutive model can predict the nonlinear mechanical behavior of polyurea elastomers over a wide range of strain rates. The research results could contribute to a deepening of the understanding of the damage and failure behavior of polyurea under impact load and provide a theoretical basis for numerical studies on impact safety design of polyurea-coated protective structures.
format Online
Article
Text
id pubmed-9460922
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-94609222022-09-10 Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates Chen, Yu Guo, Hui Sun, Minqian Lv, Xiao Polymers (Basel) Article In order to clearly explain the large deformation mechanical characteristics of polyurea under impact and to construct a dynamic model that can be used for finite element analysis, two kinds of polyurea materials were prepared by formula design, and their uniaxial tensile properties were tested with strain rates ranging from 10(−3)~10(3) s(−1) using an electronic universal testing machine and a split Hopkinson tensile bar (SHTB). The tensile stress–strain curves of polyurea were obtained under different strain rates. The difference in tensile mechanical properties of the materials was analyzed under dynamic loading and quasi-static loading. Based on the nonlinear viscoelastic theory and the energy dissipation rate inequality, a dynamic visco-hyperelastic constitutive model of polyurea elastomer was established. The research results showed that the uniaxial tensile stress–strain curves of two kinds of polyurea at different strain rates had obvious nonlinear characteristics and strain rate sensitivity and that their tensile strength increased with increased strain rate. The polyurea gradually changed from exhibiting rubbery mechanical behavior under quasi-static loading to glassy mechanical behavior under dynamic loading. The fitting analysis of experimental data and the results of finite element simulation showed that the dynamic constitutive model can predict the nonlinear mechanical behavior of polyurea elastomers over a wide range of strain rates. The research results could contribute to a deepening of the understanding of the damage and failure behavior of polyurea under impact load and provide a theoretical basis for numerical studies on impact safety design of polyurea-coated protective structures. MDPI 2022-08-30 /pmc/articles/PMC9460922/ /pubmed/36080652 http://dx.doi.org/10.3390/polym14173579 Text en © 2022 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
Chen, Yu
Guo, Hui
Sun, Minqian
Lv, Xiao
Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title_full Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title_fullStr Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title_full_unstemmed Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title_short Tensile Mechanical Properties and Dynamic Constitutive Model of Polyurea Elastomer under Different Strain Rates
title_sort tensile mechanical properties and dynamic constitutive model of polyurea elastomer under different strain rates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9460922/
https://www.ncbi.nlm.nih.gov/pubmed/36080652
http://dx.doi.org/10.3390/polym14173579
work_keys_str_mv AT chenyu tensilemechanicalpropertiesanddynamicconstitutivemodelofpolyureaelastomerunderdifferentstrainrates
AT guohui tensilemechanicalpropertiesanddynamicconstitutivemodelofpolyureaelastomerunderdifferentstrainrates
AT sunminqian tensilemechanicalpropertiesanddynamicconstitutivemodelofpolyureaelastomerunderdifferentstrainrates
AT lvxiao tensilemechanicalpropertiesanddynamicconstitutivemodelofpolyureaelastomerunderdifferentstrainrates