Experiments on shape memory alloy actuator and practical applicability considerations

Kari Tammi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    This paper describes the design and the experimental work on a force-generating Shape Memory Alloy (SMA) actuator concept.The objective of the work was to test the applicability of the actuator concept for semi-active vibration control.The actuator was designed for bolt-force adjustment in structural joints.The SMA material applied was standard commercial NiTinol alloy.Two different actuator designs were constructed and tested: a smaller air-heated design, and a larger water-heated design.The actuator's ability to generate a force as a function of the bolt pre-tension was studied in the experiments.The magnitude of the forces generated was from 1 kN to 70 kN.In terms of design and control, non-linear behavior of the actuator was considered a challenge.From the industrial application point of view, the long-term behavior and the price of the material were considered the greatest challenges.Ability to generate large forces relatively quickly was seen as a promising opportunity.Furthermore, both actuator constructions were relatively simple and consisted of a small number of components.
    Original languageEnglish
    Title of host publicationApplied Material Research at VTT
    Subtitle of host publicationSymposium on Applied Materials
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages71-81
    ISBN (Electronic)951-38-6312-3
    ISBN (Print)951-38-6311-5
    Publication statusPublished - 2006
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventInternal Symposium on Applied Materials - Espoo, Finland
    Duration: 8 Jun 20068 Jun 2006

    Publication series

    SeriesVTT Symposium
    Number244
    ISSN0357-9387

    Conference

    ConferenceInternal Symposium on Applied Materials
    CountryFinland
    CityEspoo
    Period8/06/068/06/06

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  • Cite this

    Tammi, K. (2006). Experiments on shape memory alloy actuator and practical applicability considerations. In Applied Material Research at VTT: Symposium on Applied Materials (pp. 71-81). VTT Technical Research Centre of Finland. VTT Symposium, No. 244 http://www.vtt.fi/inf/pdf/symposiums/2006/S244.pdf