期刊
SMART MATERIALS AND STRUCTURES
卷 22, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0964-1726/22/10/105003
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资金
- Air Force Office of Scientific Research [FA9550-09-1-0584]
The design of a reversible bending actuator based on a SMA/SMP composite is presented. The SMA/SMP composite is made of SMA NiTi wires with a bent 'U'-shape in the austenite phase embedded in an epoxy SMP matrix which has a memorized flat shape. The bending motion is caused by heating the composite above T-Af to activate the NiTi recovery. Upon cooling, the softening from the austenite to R-phase transformation results in a relaxation of the composite towards its original flat shape. In the three-point bending measurement the composite was able to exhibit a reversible deflection of 1.3 mm on a support with a 10 mm span. In addition, a material model for predicting the composite's deflection is presented and predicts the experimental results reasonably well. The model also estimates the in-plane internal force and the degree of the SMA phase transformation.
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