Experimental study on the tension and puncture behavior of spray polyurea at high strain rates

Polyurea is widely used as a protective coating material for structures subjected to impulsive loads. In this study, the mechanical properties of polyurea were investigated experimentally over a wide range of loading rates. Firstly, quasi-static tests were performed using conventional hydraulic mach...

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Autores principales:	Jian Cui, Yanchao Shi, Xihong Zhang, Weibo Huang, Mingliang Ma
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Polyurea Dynamic tension loads Dynamic puncture loads Strain rate effect Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/d65ec2f9a8714839bc216885408e9043
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spelling	oai:doaj.org-article:d65ec2f9a8714839bc216885408e90432021-11-24T04:23:31ZExperimental study on the tension and puncture behavior of spray polyurea at high strain rates0142-941810.1016/j.polymertesting.2020.106863https://doaj.org/article/d65ec2f9a8714839bc216885408e90432021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820320924https://doaj.org/toc/0142-9418Polyurea is widely used as a protective coating material for structures subjected to impulsive loads. In this study, the mechanical properties of polyurea were investigated experimentally over a wide range of loading rates. Firstly, quasi-static tests were performed using conventional hydraulic machine at strain rates of 7.7 × 10−4 - 7.3 × 10−3 s−1 for direct tension and at speeds of 1.67 × 10−5 - 1.67 × 10−4 m/s for puncture. Then high-speed tests were carried out using a high-speed servo-hydraulic testing machine (INSTRON VHS 160/100-20) at strain rates of 3.3–500.3 s−1 for direct tension and at speeds of 0.1–10 m/s for puncture. Deformation and failure processes of the polyurea specimens under high-speed tension were recorded with the aid of a high-speed camera. The testing results show that polyurea is a strain rate sensitive material. Under tensile loads, the initial yield stress and the strength increase with the increment of the strain rates while the fracture strain decreases. Under puncture loads, the yield force and the strength of the polyurea sheets also increase with loading rates. However, the strain rate effect on the failure deformation of the polyurea is only observed when the loading rate is less than 2 m/s. Based on the testing data, mechanism that causes the dynamic effect of polyurea material properties was discussed and some empirical relations were derived for engineering applications.Jian CuiYanchao ShiXihong ZhangWeibo HuangMingliang MaElsevierarticlePolyureaDynamic tension loadsDynamic puncture loadsStrain rate effectPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106863- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Polyurea Dynamic tension loads Dynamic puncture loads Strain rate effect Polymers and polymer manufacture TP1080-1185
spellingShingle	Polyurea Dynamic tension loads Dynamic puncture loads Strain rate effect Polymers and polymer manufacture TP1080-1185 Jian Cui Yanchao Shi Xihong Zhang Weibo Huang Mingliang Ma Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
description	Polyurea is widely used as a protective coating material for structures subjected to impulsive loads. In this study, the mechanical properties of polyurea were investigated experimentally over a wide range of loading rates. Firstly, quasi-static tests were performed using conventional hydraulic machine at strain rates of 7.7 × 10−4 - 7.3 × 10−3 s−1 for direct tension and at speeds of 1.67 × 10−5 - 1.67 × 10−4 m/s for puncture. Then high-speed tests were carried out using a high-speed servo-hydraulic testing machine (INSTRON VHS 160/100-20) at strain rates of 3.3–500.3 s−1 for direct tension and at speeds of 0.1–10 m/s for puncture. Deformation and failure processes of the polyurea specimens under high-speed tension were recorded with the aid of a high-speed camera. The testing results show that polyurea is a strain rate sensitive material. Under tensile loads, the initial yield stress and the strength increase with the increment of the strain rates while the fracture strain decreases. Under puncture loads, the yield force and the strength of the polyurea sheets also increase with loading rates. However, the strain rate effect on the failure deformation of the polyurea is only observed when the loading rate is less than 2 m/s. Based on the testing data, mechanism that causes the dynamic effect of polyurea material properties was discussed and some empirical relations were derived for engineering applications.
format	article
author	Jian Cui Yanchao Shi Xihong Zhang Weibo Huang Mingliang Ma
author_facet	Jian Cui Yanchao Shi Xihong Zhang Weibo Huang Mingliang Ma
author_sort	Jian Cui
title	Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
title_short	Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
title_full	Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
title_fullStr	Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
title_full_unstemmed	Experimental study on the tension and puncture behavior of spray polyurea at high strain rates
title_sort	experimental study on the tension and puncture behavior of spray polyurea at high strain rates
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d65ec2f9a8714839bc216885408e9043
work_keys_str_mv	AT jiancui experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT yanchaoshi experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT xihongzhang experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT weibohuang experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT mingliangma experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates
_version_	1718416062802821120

Experimental study on the tension and puncture behavior of spray polyurea at high strain rates

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