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Experimental study on pure-shear-like cyclic deformation of VHB 4910 dielectric elastomer

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Abstract

The cyclic deformation of VHB 4910 dielectric elastomer is experimentally investigated by performing a series of strain-controlled and stress-controlled pure-shear-like cyclic tests at room temperature. In the strain-controlled cyclic tests, obvious Mullins effect is observed in the first cycle, and continuous stress softening is characterized in the subsequent cycles; the Mullins effect and continuous stress softening are intensified by prescribing larger peak strains and higher strain rates. In the stress-controlled cyclic tests, remarkable ratchetting takes place, and its evolution becomes more significant if higher stress levels, lower stress rates and longer hold time at peak stress are prescribed. Moreover, a partial recovery of residual strain indicates that, besides obvious hyper-elasticity, the VHB 4910 dielectric elastomer also exhibits both recoverable viscoelasticity and measurable irrecoverable visco-plasticity during the cyclic tests.

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Acknowledgements

This work is financially supported by National Natural Science Foundation of China (11272269 and 11572265), the Opening Project of Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, China (SZDLH-1702) and Doctoral Innovation Fund Program of Southwest Jiaotong University (D-CX201837).

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Authors and Affiliations

  1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Yifu Chen & Guozheng Kang

  2. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Yifu Chen, Guozheng Kang & Jianghong Yuan

  3. Department of Engineering Mechanics, Zhejiang University, Zhejiang, 310027, Hangzhou, China

    Tiefeng Li

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  1. Yifu Chen
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Correspondence to Guozheng Kang.

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Chen, Y., Kang, G., Yuan, J. et al. Experimental study on pure-shear-like cyclic deformation of VHB 4910 dielectric elastomer. J Polym Res 26, 186 (2019). https://doi.org/10.1007/s10965-019-1858-6

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