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Effective enhanced model for a large deformable soft pneumatic actuator

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Abstract

Soft pneumatic actuators have been widely used for implementing sophisticated and dexterous movements, due to numerous fascinating features compared with their rigid counterparts. Relatively speaking, modeling and analysis of an entire soft pneumatic actuator considering contact interaction between two adjacent air chambers is extremely rare, which is exactly what we are particularly interested in. Therefore, in order to establish an accurate mechanical model and analyze the overall configuration and stress distribution for the soft pneumatic actuator with large deflection, we consider the contact interaction of soft materials rather than hard materials, to produce an effective enhanced model for soft contact of a large deformable pneumatic actuator. In this article, a multiple-point contact approach is developed to circumvent the mutual penetration problem between adjacent air chambers of the soft actuator that occurs with the single-point contact approach employed in linear elastic rigid materials. In contrast to the previous simplified rod-based model that did not focus on contact interaction which was adopted to clarify the entire deformation of the actuator, the present model not only elaborates nonlinear large deformation and overall configuration variations, but also accurately delineates stress distribution law inside the chamber structure and the stress concentration phenomenon. By means of a corresponding static experiment, a comparison of the simulation results with experimental data validates the effectiveness and accuracy of this model employing a multiple-point contact approach. Excellent simulation of the actual bending deformation of the soft actuator is obtained, while mutual penetration is successfully circumvented, whereas the model with single-point contact cannot achieve those goals. Finally, as compared with the rod-based model, the results obtained using the proposed model are more consistent with experimental data, and simulation precision is improved.

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References

  1. Shen, H.: Meet the soft, cuddly robots of the future. Nature 530, 24–26 (2016)

    Article  Google Scholar 

  2. Gu, G.Y., Zhu, J., Zhu, L.M., et al.: A survey on dielectric elastomer actuators for soft robots. Bioinspir. Biomimetics. 12, 011003 (2017)

    Article  Google Scholar 

  3. Deimel, R., Brock, O.: A novel type of compliant and underactuated robotic hand for dexterous grasping. Int. J. Rob. Res. 35, 161–185 (2016)

    Article  Google Scholar 

  4. Kofod, G., Wirges, W., Paajanen, M., et al.: Energy minimization for self-organized structure formation and actuation. Appl. Phys. Lett. 90, 081916 (2007)

    Article  Google Scholar 

  5. Ilievski, F., Mazzeo, A.D., Shepherd, R.F., et al.: Soft robotics for chemists. Angew. Chem. Int. Ed. 123, 1930–1935 (2011)

    Article  Google Scholar 

  6. Lin, H.T., Leisk, G.G., Trimmer, B.A.: GoQBot: a caterpillar-inspired soft-bodied rolling robot. Bioinspir. Biomimetics. 6, 026007 (2011)

    Article  Google Scholar 

  7. Lee, H., Xia, C., Fang, N.X.: First jump of microgel: actuation speed enhancement by elastic instability. Soft Matter 6, 4342–4345 (2010)

    Article  Google Scholar 

  8. Martinez, R.V., Branch, J.L., Fish, C.R., et al.: Robotic tentacles with three-dimensional mobility based on flexible elastomers. Adv. Mater. 25, 205–212 (2013)

    Article  Google Scholar 

  9. Polygerinos, P., Lyne, S., Wang, Z., et al.: Towards a soft pneumatic glove for hand rehabilitation. In: IEEE/RSJ international conference on intelligent robots and systems (IROS), Tokyo, November 3–7 (2013)

  10. Wang, T.Y., Ge, L.S., Gu, G.Y.: Programmable design of soft pneu-net actuators with oblique chambers can generate coupled bending and twisting motions. Sens. Actuat. A. 271, 131–138 (2018)

    Article  Google Scholar 

  11. Connolly, F., Polygerinos, P., Walsh, C.J., et al.: Mechanical programming of soft actuators by varying fiber angle. Soft Rob. 2, 26–32 (2015)

    Article  Google Scholar 

  12. Bishop-Moser, J., Kota, S.: Towards snake-like soft robots: Design of fluidic fiber-reinforced elastomeric helical manipulators. In: IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Tokyo, November 3-7 (2013)

  13. Zhou, X., Majidi, C., O’Reilly, O.M.: Soft hands: an analysis of some gripping mechanisms in soft robot design. Int. J. Solids Struct. 64–65, 155–165 (2015)

    Article  Google Scholar 

  14. De Payrebrune, K.M., O’Reilly, O.M.: On constitutive relations for a rod-based model of a pneu-net bending actuator. Extreme Mech. Lett. 8, 38–46 (2016)

    Article  Google Scholar 

  15. De Payrebrune, K.M., O’Reilly, O.M.: On the development of rod-based models for pneumatically actuated soft robot arms: a five-parameter constitutive relation. Int. J. Solids Struct. 120, 226–235 (2017)

    Article  Google Scholar 

  16. Zhou, X., Majidi, C., O’ Reilly, O.M.: Flexing into motion: a locomotion mechanism for soft robots. Int. J. Non-Linear Mech. 74, 7–17 (2015)

    Article  Google Scholar 

  17. Matia, Y., Gat, A.D.: Dynamics of elastic beams with embedded fluid-filled parallel-channel networks. Soft Rob. 2, 42–47 (2015)

    Article  Google Scholar 

  18. Holland, D., Park, E.J., Polygerinos, P., et al.: The Soft Robotics Toolkit: shared resources for research and design. Soft Robot. 1, 224–230 (2014)

    Article  Google Scholar 

  19. Xu, Q.P., Liu, J.Y.: An improved dynamic model for a silicone material beam with large deformation. Acta. Mech. Sin. 34, 744–753 (2018)

    Article  MathSciNet  Google Scholar 

  20. Jung, S., Park, T., Chung, W.: Dynamic analysis of rubber-like material using absolute nodal coordinate formulation based on the non-linear constitutive law. Nonlinear Dyn. 63, 149–157 (2011)

    Article  Google Scholar 

  21. Orzechowski, G., Fraczek, J.: Nearly incompressible nonlinear material models in the large deformation analysis of beams using ANCF. Nonlinear Dyn. 82, 451–464 (2015)

    Article  MathSciNet  Google Scholar 

  22. Konyukhov, A., Schweizerhof, K.: Computational contact mechanics-geometrically exact theory for arbitrary shaped bodies. Springer, New York (2012)

    MATH  Google Scholar 

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grants 11772186 and 11272203).

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Authors and Affiliations

  1. Department of Engineering Mechanics, Key Laboratory of Hydrodynamics (Ministry of Education), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Qiping Xu & Jinyang Liu

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  1. Qiping Xu
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  2. Jinyang Liu
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Correspondence to Jinyang Liu.

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Xu, Q., Liu, J. Effective enhanced model for a large deformable soft pneumatic actuator. Acta Mech. Sin. 36, 245–255 (2020). https://doi.org/10.1007/s10409-019-00903-9

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  • DOI: https://doi.org/10.1007/s10409-019-00903-9

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