形状記憶合金薄帯板素子のねじり変形特性

概要

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If a shape-memory alloy (SMA) thin strip is applied to the elements subjected to torsion, a rotary driving element with a simple mechanism can be developed. In order to develop the rotary driving elements with the SMA thin strip, the torsion test, the recovery torque test and the torsion fatigue test were carried out for the TiNi SMA thin strip. The basic characteristics of the SMA thin strip for torsion were obtained. Torque increases in proportion to angle of twist and temperature. Recovery torque increases in proportion to angle of twist and temperature. The recoverable strain energy increases in proportion to temperature, but the dissipated work decreases slightly with an increase in temperature. Fatigue life decreases in proportion to amplitude of twisting angle. The fatigue life of the heat-treated material is longer than that of the as-received material. The fatigue limit of amplitude of twisting angle for the heat-treated material is almost the same as that for the as-received material. In order to develop the rotary driving elements, an opening or closing door driven by the SMA thin strip is demonstrated.
社団法人日本機械学会の論文
2007-11-25