Ti-Ni形状記憶合金コイルばねの荷重-伸び特性

概要

論文の詳細を見る
The strain and stress behavior in a coil spring of a Ti-Ni SMA were investigated over a wide range of elongation, for the case of zero axial twist because of the simple calculation of shear and normal strain with the geometrical condition only. The basic σ-ε and τ-γ relations of the SMA material were obtained from the results of a tensile test and torsional test carried out under several constant temperatures, using a φ1 wire specimen. The strain criteria for start and finish of transformation under the combined strain were expressed by a strain circle and a modified strain circle, respectively, in each temperature. The simulation for load-elongation behavior of the SMA coil spring based on the basic stress-strain curves and the strain criteria under the combined strain showed a good correlation with experimental results.
社団法人日本機械学会の論文
1995-07-25