31 March 2009 Effects of phase inhomogeneity and boundary conditions on the dynamic response of SMA wire actuators
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Abstract
This paper reports the simulation results from the dynamic analysis of a Shape Memory Alloy (SMA) actuator. The emphasis is on understanding the dynamic behavior under various loading rates and boundary conditions, resulting in complex scenarios such as thermal and stress gradients. Also, due to the polycrystalline nature of SMA wires, presence of microstructural inhomogeneity is inevitable. Probing the effect of inhomogeneity on the dynamic behavior can facilitate the prediction of life and characteristics of SMA wire actuator under varieties of boundary and loading conditions. To study the effect of these factors, an initial boundary value problem of SMA wire is formulated. This is subsequently solved using finite element method. The dynamic response of the SMA wire actuator is analyzed under mechanical loading and results are reported. Effect of loading rate, micro-structural inhomogeneity and thermal boundary conditions on the dynamic response of SMA wire actuator is investigated and the simulation results are reported.
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Kannan Dasharathi, Kannan Dasharathi, D. Roy Mahapatra, D. Roy Mahapatra, } "Effects of phase inhomogeneity and boundary conditions on the dynamic response of SMA wire actuators", Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 72890Q (31 March 2009); doi: 10.1117/12.815999; https://doi.org/10.1117/12.815999
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