Experiments on shape memory alloy actuator and practical applicability considerations

Kari Tammi

    Research output: Contribution to journalArticleScientificpeer-review

    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 behaviour of the actuator was considered a challenge. For the industrial application point-of-view, the long-term behaviour 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 small number of components.
    Original languageEnglish
    Pages (from-to)57-64
    JournalRakenteiden Mekaniikka
    Volume40
    Issue number1
    Publication statusPublished - 2007
    MoE publication typeNot Eligible

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    Shape memory effect
    Actuators
    Experiments
    Bolts
    Vibration control
    Industrial applications
    Air
    Water

    Cite this

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    title = "Experiments on shape memory alloy actuator and practical applicability considerations",
    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 behaviour of the actuator was considered a challenge. For the industrial application point-of-view, the long-term behaviour 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 small number of components.",
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    Experiments on shape memory alloy actuator and practical applicability considerations. / Tammi, Kari.

    In: Rakenteiden Mekaniikka, Vol. 40, No. 1, 2007, p. 57-64.

    Research output: Contribution to journalArticleScientificpeer-review

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    AB - 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 behaviour of the actuator was considered a challenge. For the industrial application point-of-view, the long-term behaviour 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 small number of components.

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