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Experimental Study of Low-Cycle Fatigue and Recovery of Polymer Blends for Viscous Damping Walls.

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Title: Experimental Study of Low-Cycle Fatigue and Recovery of Polymer Blends for Viscous Damping Walls.
Authors: He, Songhang1 (AUTHOR), Sun, Feifei1,2 (AUTHOR) wxj19960525@swu.edu.cn, Xu, Defeng1,3 (AUTHOR), Wu, Xiangjun1,3 (AUTHOR)
Source: Polymers (20734360). May2026, Vol. 18 Issue 9, p1022. 32p.
Subjects: Polymer blends, Viscoelastic materials, Silicones, Damping (Mechanics), Energy dissipation, Dynamic mechanical analysis, Viscoelasticity, Fatigue life
Abstract: The viscoelastic materials used in traditional viscous damping walls (VDWs) typically exhibit high storage moduli, which tend to exacerbate the structural response of adjacent components during earthquakes. Furthermore, existing studies are mostly limited to small-strain characterization and lack investigation into the macroscopic mechanical recovery characteristics of materials under mainshock-aftershock sequences. To overcome these limitations, this study introduces silicone oil (SO) as a softener to prepare a novel viscoelastic polymer blend (PIB-B12-SO). Utilizing a customized self-stabilization dynamic sandwich-type shear (S-DSTS) device, the macroscopic dynamic mechanical behavior of the blend was systematically evaluated, focusing on its low-cycle fatigue and rest-recovery characteristics. The results indicate that the addition of SO effectively reduces the storage modulus and significantly enhances the loss factor of the blend. Notably, at a mixing ratio of 1:4 (SO: PIB-B12), the loss factor increased by 65.6% compared to pure PIB-B12. Furthermore, the introduction of SO effectively suppresses the degradation of the loss modulus under cyclic loading and promotes viscous recovery during the rest periods. The silicone oil blend modification successfully optimizes the macroscopic viscoelastic properties of PIB-B12, significantly enhancing the energy dissipation stability of the material under low-cycle fatigue and interval loading. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193716157
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  Label: Title
  Group: Ti
  Data: Experimental Study of Low-Cycle Fatigue and Recovery of Polymer Blends for Viscous Damping Walls.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22He%2C+Songhang%22">He, Songhang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Feifei%22">Sun, Feifei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wxj19960525@swu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Defeng%22">Xu, Defeng</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Xiangjun%22">Wu, Xiangjun</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2026, Vol. 18 Issue 9, p1022. 32p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Polymer+blends%22">Polymer blends</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelastic+materials%22">Viscoelastic materials</searchLink><br /><searchLink fieldCode="DE" term="%22Silicones%22">Silicones</searchLink><br /><searchLink fieldCode="DE" term="%22Damping+%28Mechanics%29%22">Damping (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+mechanical+analysis%22">Dynamic mechanical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelasticity%22">Viscoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Fatigue+life%22">Fatigue life</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The viscoelastic materials used in traditional viscous damping walls (VDWs) typically exhibit high storage moduli, which tend to exacerbate the structural response of adjacent components during earthquakes. Furthermore, existing studies are mostly limited to small-strain characterization and lack investigation into the macroscopic mechanical recovery characteristics of materials under mainshock-aftershock sequences. To overcome these limitations, this study introduces silicone oil (SO) as a softener to prepare a novel viscoelastic polymer blend (PIB-B12-SO). Utilizing a customized self-stabilization dynamic sandwich-type shear (S-DSTS) device, the macroscopic dynamic mechanical behavior of the blend was systematically evaluated, focusing on its low-cycle fatigue and rest-recovery characteristics. The results indicate that the addition of SO effectively reduces the storage modulus and significantly enhances the loss factor of the blend. Notably, at a mixing ratio of 1:4 (SO: PIB-B12), the loss factor increased by 65.6% compared to pure PIB-B12. Furthermore, the introduction of SO effectively suppresses the degradation of the loss modulus under cyclic loading and promotes viscous recovery during the rest periods. The silicone oil blend modification successfully optimizes the macroscopic viscoelastic properties of PIB-B12, significantly enhancing the energy dissipation stability of the material under low-cycle fatigue and interval loading. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/polym18091022
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 32
        StartPage: 1022
    Subjects:
      – SubjectFull: Polymer blends
        Type: general
      – SubjectFull: Viscoelastic materials
        Type: general
      – SubjectFull: Silicones
        Type: general
      – SubjectFull: Damping (Mechanics)
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
      – SubjectFull: Dynamic mechanical analysis
        Type: general
      – SubjectFull: Viscoelasticity
        Type: general
      – SubjectFull: Fatigue life
        Type: general
    Titles:
      – TitleFull: Experimental Study of Low-Cycle Fatigue and Recovery of Polymer Blends for Viscous Damping Walls.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: He, Songhang
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          Name:
            NameFull: Sun, Feifei
      – PersonEntity:
          Name:
            NameFull: Xu, Defeng
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          Name:
            NameFull: Wu, Xiangjun
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 18
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              Value: 9
          Titles:
            – TitleFull: Polymers (20734360)
              Type: main
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