Smart Structures and Systems

  • 제15권6호
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  • Pages.1521-1542
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  • 2015
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Experimental analyses of dynamical systems involving shape memory alloys

  • Enemark, Soren (Technical University of Denmark, Department of Mechanical Engineering) ;
  • Savi, Marcelo A. (Universidade Federal do Rio de Janeiro, COPPE-Department of Mechanical Engineering) ;
  • Santos, Ilmar F. (Technical University of Denmark, Department of Mechanical Engineering)
  • 투고 : 2013.09.05
  • 심사 : 2014.05.16
  • 발행 : 2015.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

The use of shape memory alloys (SMAs) in dynamical systems has an increasing importance in engineering especially due to their capacity to provide vibration reductions. In this regard, experimental tests are essential in order to show all potentialities of this kind of systems. In this work, SMA springs are incorporated in a dynamical system that consists of a one degree of freedom oscillator connected to a linear spring and a mass, which is also connected to the SMA spring. Two types of springs are investigated defining two distinct systems: a pseudoelastic and a shape memory system. The characterisation of the springs is evaluated by considering differential calorimetry scanning tests and also force-displacement tests at different temperatures. Free and forced vibration experiments are made in order to investigate the dynamical behaviour of the systems. For both systems, it is observed the capability of changing the equilibrium position due to phase transformations leading to hysteretic behaviour, or due to temperature changes which also induce phase transformations and therefore, change in stiffness. Both situations are investigated by promoting temperature changes and also pre-tension of the springs. This article shows several experimental tests that allow one to obtain a general comprehension of the dynamical behaviour of SMA systems. Results show the general thermo-mechanical behaviour of SMA dynamical systems and the obtained conclusions can be applied in distinct situations as in rotor-bearing systems.

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참고문헌

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피인용 문헌

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  2. Using 0–1 test to diagnose chaos on shape memory alloy dynamical systems vol.103, 2017, https://doi.org/10.1016/j.chaos.2017.06.016
  3. Experimental study on the aeroelastic behavior of a typical airfoil section with superelastic shape memory alloy springs 2017, https://doi.org/10.1177/1045389X17721024
  4. Investigation of Gas Foil Bearings With an Adaptive and Non-Linear Structure vol.13, pp.1, 2015, https://doi.org/10.2478/ama-2019-0001
  5. Simultaneous Measurements in Shape Memory Alloy Springs to Enable Structural Health Monitoring by Self-Sensing Actuation vol.46, pp.6, 2021, https://doi.org/10.1007/s13369-020-05259-y