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A general solution for one dimensional chemo-mechanical coupled hydrogel rod

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Abstract

Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under chemo-mechanical coupling was analytically studied based on a poroelastical model. The already known constitutive and governing equations were simplified into the one dimensional case, then two different boundary conditions were considered. The expressions of concentration, displacement, chemical potential and stress related to time were obtained in a series form. Examples illustrate the interaction mechanism of chemical and mechanical effect. It was found that there was a balance state in the diffusion of concentration and the diffusion process could lead to the expansion or the stress change of the hydrogel rod.

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Acknowledgements

The financial supports from the National Natural Science Foundation of China (Grants 11472020, 11502007, and 11632005) and Hong Kong Scholars Program (Grant XJ2016021) are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Engineering Mechanics, Beijing University of Technology, Beijing, 100124, China

    Xing-Quan Wang & Qing-Sheng Yang

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  1. Xing-Quan Wang
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  2. Qing-Sheng Yang
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Correspondence to Qing-Sheng Yang.

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Wang, XQ., Yang, QS. A general solution for one dimensional chemo-mechanical coupled hydrogel rod. Acta Mech. Sin. 34, 392–399 (2018). https://doi.org/10.1007/s10409-017-0728-x

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  • DOI: https://doi.org/10.1007/s10409-017-0728-x

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