| Free volume based nonlinear viscoelastic model for polyurea over a wide range of strain rates and temperatures | |
Gong CC(龚臣成)1,2; Chen Y(陈艳)1,2 ; Li, Ting3; Liu, Zhanli4; Zhuang, Zhuo4; Guo, Baohua3; Wang HY(汪海英)1,2; Dai LH(戴兰宏)1,2
| |
| Corresponding Author | Chen, Yan([email protected]) ; Dai, Lanhong([email protected]) |
| Source Publication | MECHANICS OF MATERIALS
 |
| 2021 | |
| Volume | 152Pages:11 |
| ISSN | 0167-6636 |
| Abstract | A series of quasi-static and dynamic uniaxial compression experiments over a wide range of temperatures were conducted on polyurea elastomer. The stress-strain response of polyurea exhibits extreme nonlinearity, temperature and strain-rate sensitivity. How to comprehensively describe these complex behaviors regulated by the unique micro-structure of polyurea is still an open question. In this paper, a nonlinear viscoelastic constitutive model for polyurea is developed. The nonlinear viscoelasticity, entropic and energetic elasticity are taken into account, correlated with the interaction of chain segments, the stretch of molecular chains and covalent bonds from the perspective of molecular structure. The viscoelastic response is formulated by the hereditary integral of relaxation modulus and strain rate with time. The real time is accelerated by shift factor, which depends on the free volume. A new mechanism of shear-induced increase of free volume, which gives rise to the nonlinearity of viscoelasticity, is proposed, and the corresponding rate-dependent evolution equation of fractional free volume is developed. Parameters in the model are determined through the compression experiments and DMA test. Comparison with experimental data, as well as the data from references, verifies the ability of the model to predict the nonlinear stress-strain response of polyurea over a wide range of temperatures and strain rates. |
| Keyword | Nonlinear viscoelasticity Free volume Constitutive model Polyurea |
| DOI | 10.1016/j.mechmat.2020.103650 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000599652400004 |
| WOS Keyword | CONSTITUTIVE MODEL ; MECHANICAL-PROPERTIES ; DEFORMATION-BEHAVIOR ; PHYSICAL-PROPERTIES ; AMORPHOUS POLYMERS ; RUBBER ELASTICITY ; PRESSURE ; MICROSTRUCTURE ; TENSILE ; EQUILIBRIUM |
| WOS Research Area | Materials Science ; Mechanics |
| WOS Subject | Materials Science, Multidisciplinary ; Mechanics |
| Funding Project | National Key Research and Development Program of China[2017YFB0702003] ; NSFC[11790292] ; NSFC[11972346] ; NSFC[11672316] ; Strategic Priority Research Program[XDB22040302] ; Key Research Program of Frontier Sciences[QYZDJSSW-JSC011] ; Science Challenge Project[TZ2016001] |
| Funding Organization | National Key Research and Development Program of China ; NSFC ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; Science Challenge Project |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Chen, Yan ; Dai, Lanhong |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85886 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 3.Tsinghua Univ, Dept Chem Engn, Adv Mat Lab, Minist Educ, Beijing 100084, Peoples R China; 4.Tsinghua Univ, Sch Aerosp Engn, Appl Mech Lab, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Gong CC,Chen Y,Li, Ting,et al. Free volume based nonlinear viscoelastic model for polyurea over a wide range of strain rates and temperatures[J]. MECHANICS OF MATERIALS,2021,152:11.Rp_Au:Chen, Yan, Dai, Lanhong |
| APA | 龚臣成.,陈艳.,Li, Ting.,Liu, Zhanli.,Zhuang, Zhuo.,...&戴兰宏.(2021).Free volume based nonlinear viscoelastic model for polyurea over a wide range of strain rates and temperatures.MECHANICS OF MATERIALS,152,11. |
| MLA | 龚臣成,et al."Free volume based nonlinear viscoelastic model for polyurea over a wide range of strain rates and temperatures".MECHANICS OF MATERIALS 152(2021):11. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2021064.pdf（5203KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment