Development of a frequency-dependent constitutive model for hysteresis of shape memory alloys
| Autor: | Saeid Shakiba, Moosa Ayati, Aghil Yousefi-Koma |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Mechanical Engineering Constitutive equation 02 engineering and technology Shape-memory alloy 021001 nanoscience & nanotechnology Smart material Condensed Matter::Materials Science Hysteresis 020303 mechanical engineering & transports 0203 mechanical engineering General Materials Science Development (differential geometry) 0210 nano-technology Excitation |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 234:1535-1549 |
| ISSN: | 2041-3076 1464-4207 |
| Popis: | In this study, a constitutive model based on Liang-Rogers’s relations is developed to characterize the effect of the excitation frequency in the hysteresis of shape memory alloys. Shape memory alloys are good candidates as smart actuators because of their high strain and power density, although the complex hysteresis behavior barricades their usage. Although constitutive models are one of the most potent methods to predict the shape memory alloys behavior, they cannot consider the effect of excitation frequency in active applications. In this paper, the Liang-Rogers model is modified to consider this effect using a linear relation between the excitation frequency and martensite transformation temperatures. A shape memory alloy-driven actuator as a morphing wing is employed to characterize the frequency effect on shape memory alloy hysteresis. Experimental results show that the hysteresis is widened when the excitation frequency increases. The modeling results show that the original model significantly fails to predict the correct behavior when the frequency increases, whereas the proposed model can adequately handle the frequency effect on the behavior of the shape memory alloy-driven actuator. |
| Databáze: | OpenAIRE |
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