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Experimental characterisation and modelling of mechanical behaviour of microcapsules

  • Polymers & biopolymers
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Abstract

Results of experimental characterisation and modelling of mechanical behaviour of microcapsules for self-sensing polymer composites are presented. Melamine–formaldehyde microcapsules were selected for this purpose. The average diameter, size distribution, and shell thickness of microcapsules were evaluated from scanning electron microscopy images. Compressive properties of the shell material were evaluated in several ways. AFM measurements allowed estimating stiffness and strength of a single microcapsule. In parallel, modelling of the mechanical behaviour of a single microcapsule was performed. Buckling of a thin-walled spherical shell under external pressure was considered and closed-form solution in a linear statement was obtained. The results of analytical calculations were compared with FEM modelling. Two demonstrator thin-shells with the radius of centimetre scale, hollow and filled with water, were tested in compression between two rigid plates. The results of their numerical analysis obtained by FEM models developed are in good agreement with experimental results.

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Acknowledgements

This research is funded by the Latvian Council of Science, project DUROCAPS, Project No. lzp-2018/1–0084. This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreements No 645662; was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 and UIDP/50011/2020, financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.

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Authors and Affiliations

  1. Institute for Mechanics of Materials, University of Latvia, Riga, Latvia

    A. Aniskevich, V. Kulakov & O. Bulderberga

  2. Faculty Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Pardubice, Czech Republic

    P. Knotek

  3. CICECO/DEMaC, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal

    J. Tedim

  4. Smallmatek-Small Materials and Technologies Lda, Aveiro, Portugal

    F. Maia

  5. Department of Mechanical Engineering, Kaunas University of Technology, Kaunas, Lithuania

    V. Leisis & D. Zeleniakiene

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  1. A. Aniskevich
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Correspondence to A. Aniskevich.

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Aniskevich, A., Kulakov, V., Bulderberga, O. et al. Experimental characterisation and modelling of mechanical behaviour of microcapsules. J Mater Sci 55, 13457–13471 (2020). https://doi.org/10.1007/s10853-020-04925-8

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