31 May 1996 Analysis of phase transformation fronts in SMA composites
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Shape memory alloy (SMA) wires can be embedded in a host material to alter the stiffness or modal response and provide vibration control. The interaction between the embedded SMA and the host material is critical to applications requiring transfer of loads or strain from the wire to the host. Although there has been a significant amount of research dedicated to characterizing and modeling the response of SMA alone, little research has focused on the transformation behavior of embedded SMA wires. In the current work, photoelasticity is utilized to quantify the development of internal stresses induced by the actuation of a SMA wire embedded in a pure polymer matrix. Through the use of a CCD camera and a frame grabber, photoelastic images are digitally recorded at discrete time increments. Shear stresses induced during the actuation are calculated as a function of time. Computational predictions of the transformation fronts are made using finite elements analysis and compared with experimental observations.
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Nancy R. Sottos, Nancy R. Sottos, G. E. Kline, G. E. Kline, Muhammad A. Qidwai, Muhammad A. Qidwai, Dimitris C. Lagoudas, Dimitris C. Lagoudas, } "Analysis of phase transformation fronts in SMA composites", Proc. SPIE 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures, (31 May 1996); doi: 10.1117/12.240819; https://doi.org/10.1117/12.240819

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