Optimal design of robust piezoelectric microgrippers undergoing large displacements

D. Ruiz*, Ole Sigmund

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    Topology optimization combined with optimal design of electrodes is used to design piezoelectric microgrippers. Fabrication at micro-scale presents an important challenge: due to non-symmetrical lamination of the structures, out-of-plane bending spoils the behaviour of the grippers. Suppression of this out-of plane deformation is the main novelty introduced in this work. In addition, a robust approach is used to control length scale in the whole domain and to reduce sensitivity of the design to small fabrication errors. Geometrically non-linear modelling is used for the in-plane deformations whereas out-of-plane motions are modelled by a linear, un-coupled plate model to save computational time. Model and resulting designs are validated by subsequent 3D geometrically non-linear modelling.
    Original languageEnglish
    JournalStructural and Multidisciplinary Optimization
    Volume75
    Pages (from-to)71-82
    ISSN1615-147X
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Topology optimization
    • Unimorph
    • Large displacements
    • Energy interpolation
    • Piezoelectric effect
    • Electrode profile

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