Shape memory alloy TiNi fiber epoxy resin composite (SMA-FEC) was developed and the active reinforcement effect of the material was investigated by strain gauge measurement and photoelastic method. In this paper material processing of the SMA-FEC and mechanical testing results are described. The recovery stress-strain at various ambient temperatures by means of strain gauges are reported. A typical shrinkage of the SMA-FEC was recognized with increasing temperature above the inverse transformation temperature of embedded SMA TiNi fiber, and it depended on the fiber volume fraction as well as prestrain value. The validity of the composite using the photoelastic model was discussed in detail. By adjusting the fiber volume fraction and prestrain, one can obtain expected elastic modulus and stress fringes value to conduct photoelastic experiment with SMA-FEC as model material. The active reinforcement of the SMA-FEC smart composite was reconfirmed visually from the change of the photoelastic fringe patterns of the specimen by heating at various temperatures.
Development of Shape Memory TiNi Fiber Reinforced Epoxy Matrix Composite and Its Properties
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division September 2, 2000; revised manuscript received April 3, 2002. Associate Editor: G. Newaz.
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Shimamoto, A., Hawong , J., and Lee, H. (September 30, 2002). "Development of Shape Memory TiNi Fiber Reinforced Epoxy Matrix Composite and Its Properties ." ASME. J. Eng. Mater. Technol. October 2002; 124(4): 390–396. https://doi.org/10.1115/1.1494449
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