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Abstract:
The
restrained shape memory alloy (SMA) wires, as actuators, are winded and
pasted on the outside surfaces of a thin wall tube at angle of a degree
with respect to the tube axis. Upon beating the wires, the martensitic
residual strain will be restored, the large recovery forces are induced
so that the tube will induce deformation. A mechanic model of a thin
tube pasted with an actuator (SMA wires), is presented, the mixed
deformations of compression and torsion of the tube are analyzed and the
relation between the angle of twist of the tube and temperature in a
temperature cycle is given. The theoretical predictions are validated
with static experiments.
Key words:
Shape
memory alloy Actuator Thin walled tube Smart structure
CLC No: V257
国家自然科学基金、清华大学精密测试技术与仪器国家重点实验室基金资助项目. Received 19991130,
received in revised form 20001026
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