855 形状記憶合金の微視的考察に基づく一次元内部ループモデル

概要

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A specimen-based one-dimensional model of SMA was derived from the grain-based micromechanical model we proposed under Reuss assumption, where the transformation criterion was used that the phase transformation was assumed to occur when a driving energy was equal to a required transformation energy. Moreover to describe inner loops the shift-skip model was proposed based on micromechanical consideration, where the required transformation energy was shifted or skipped at the turn volume fractions. To verify the validity of the proposed model, comparison of small-strain loops of stress-strain relationship between experiment and calculation based on the model was performed. Here an exponential function was applied to the required transformation energy function from the experimental observation. The result showed the model could capture the small-strain loops quantitatively. That suggests that this model can be applied to analyzing SMA or designing smart structural elements including SMA.
社団法人日本機械学会の論文
2003-08-05