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作者:

Tian, Shuanzhu (Tian, Shuanzhu.) | Yan, Qiushi (Yan, Qiushi.) | Jiang, Yudan (Jiang, Yudan.) | Du, Xiuli (Du, Xiuli.)

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EI Scopus SCIE

摘要:

Polyurea is extensively utilized as a protective coating material for structures under impact and blast loadings, owing to its significant large tensile deformation capability and strain hardening effect. In this study, the tensile performance of polyurea was experimentally and theoretically investigated. Firstly, rational geometric shapes and dimensions were designed, and a series of quasi-static and dynamic uniaxial tensile tests were conducted to obtain the nonlinear stressstrain curves at different strain rates. The results indicated a notable strain-rate effect in polyurea, with an increase in elastic modulus and tensile stress as the strain rate increased. Moreover, as the strain rate escalates, the strain hardening effect becomes more pronounced, thereby enhancing the protective capabilities of polyurea. Subsequently, an existing hyperelastic model, namely the Mooney-Rivlin (MR) model, was modified to incorporate the strain rate effect, resulting in a non-linear visco-hyperelastic constitutive model. Furthermore, the proposed constitutive model and parameters were validated by simulating existing tensile and blast tests using the finite element (FE) program LS-DYNA. This work could provide a reference for the design of structural protection.

关键词:

Visco-hyperelastic model Polyurea Dynamic mechanical properties Strain-rate effect

作者机构:

  • [ 1 ] [Tian, Shuanzhu]Beijing Univ Technol, Coll Architecture & Civil Engn, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Yan, Qiushi]Beijing Univ Technol, Coll Architecture & Civil Engn, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Jiang, Yudan]Beijing Univ Technol, Coll Architecture & Civil Engn, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Coll Architecture & Civil Engn, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China

通讯作者信息:

  • [Yan, Qiushi]Beijing Univ Technol, Coll Architecture & Civil Engn, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China;;

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来源 :

JOURNAL OF BUILDING ENGINEERING

年份: 2024

卷: 94

6 . 4 0 0

JCR@2022

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SCOPUS被引频次: 7

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