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    Electromechanical Modeling of Softening Behavior for Dielectric Elastomers

    Source: Journal of Applied Mechanics:;2018:;volume( 085 ):;issue: 011::page 111010
    Author:
    Lv, Xiongfei
    ,
    Liu, Liwu
    ,
    Liu, Yanju
    ,
    Leng, Jinsong
    DOI: 10.1115/1.4040405
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Dielectric elastomer (DE) is a promising electroactive polymer. As DE material, rubbers are often filled with functional particles to improve their electromechanical performance. However, the filled particles also bring stress softening, which is known as Mullins effect. In this paper, we prepared the carbon nanotube filled silicone elastomer (SE) as DE composite and modeled its Mullins effect using the pseudo-elastic theory. Then, the thermodynamics of DE was combined to predict the idealized electromechanical softening behavior. Two cases are considered: linear dielectric and saturated dielectric. For linear dielectric with an initial force, “residual strain” will appear after every voltage-controlled cycle, and instability may be eliminated in reloading. For saturated dielectric, the material response changes a lot after saturation, which also affects the subsequent softening behavior. At last, viscoelasticity was further incorporated to account for rate-dependent softening deformation, and we also carried out some simple electromechanical experiments on VHB 4910 to explore its softening behavior. This work may lead to a better understanding of the softening behavior in DEs undergoing electromechanical coupling situations.
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      Electromechanical Modeling of Softening Behavior for Dielectric Elastomers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4251543
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    contributor authorLv, Xiongfei
    contributor authorLiu, Liwu
    contributor authorLiu, Yanju
    contributor authorLeng, Jinsong
    date accessioned2019-02-28T10:59:48Z
    date available2019-02-28T10:59:48Z
    date copyright8/31/2018 12:00:00 AM
    date issued2018
    identifier issn0021-8936
    identifier otherjam_085_11_111010.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4251543
    description abstractDielectric elastomer (DE) is a promising electroactive polymer. As DE material, rubbers are often filled with functional particles to improve their electromechanical performance. However, the filled particles also bring stress softening, which is known as Mullins effect. In this paper, we prepared the carbon nanotube filled silicone elastomer (SE) as DE composite and modeled its Mullins effect using the pseudo-elastic theory. Then, the thermodynamics of DE was combined to predict the idealized electromechanical softening behavior. Two cases are considered: linear dielectric and saturated dielectric. For linear dielectric with an initial force, “residual strain” will appear after every voltage-controlled cycle, and instability may be eliminated in reloading. For saturated dielectric, the material response changes a lot after saturation, which also affects the subsequent softening behavior. At last, viscoelasticity was further incorporated to account for rate-dependent softening deformation, and we also carried out some simple electromechanical experiments on VHB 4910 to explore its softening behavior. This work may lead to a better understanding of the softening behavior in DEs undergoing electromechanical coupling situations.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleElectromechanical Modeling of Softening Behavior for Dielectric Elastomers
    typeJournal Paper
    journal volume85
    journal issue11
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4040405
    journal fristpage111010
    journal lastpage111010-10
    treeJournal of Applied Mechanics:;2018:;volume( 085 ):;issue: 011
    contenttypeFulltext
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