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...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-01-01
|
| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941820320924 |
| _version_ | 1818405549129072640 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-14T08:57:48Z |
| format | Article |
| id | doaj.art-d65ec2f9a8714839bc216885408e9043 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-12-14T08:57:48Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-d65ec2f9a8714839bc216885408e90432022-12-21T23:08:52ZengElsevierPolymer Testing0142-94182021-01-0193106863Experimental study on the tension and puncture behavior of spray polyurea at high strain ratesJian Cui0Yanchao Shi1Xihong Zhang2Weibo Huang3Mingliang Ma4Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China; School of Civil Engineering, Tianjin University, Tianjin 300072, ChinaKey Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China; School of Civil Engineering, Tianjin University, Tianjin 300072, China; Corresponding authorKey Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, ChinaCentre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Perth Western Australia 6845, AustraliaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaPolyurea 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.http://www.sciencedirect.com/science/article/pii/S0142941820320924PolyureaDynamic tension loadsDynamic puncture loadsStrain rate effect |
| spellingShingle | 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 Polymer Testing Polyurea Dynamic tension loads Dynamic puncture loads Strain rate effect |
| title | 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_short | 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 |
| topic | Polyurea Dynamic tension loads Dynamic puncture loads Strain rate effect |
| url | http://www.sciencedirect.com/science/article/pii/S0142941820320924 |
| work_keys_str_mv | AT jiancui experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT yanchaoshi experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT xihongzhang experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT weibohuang experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates AT mingliangma experimentalstudyonthetensionandpuncturebehaviorofspraypolyureaathighstrainrates |