726 TiNi 形状記憶合金コイルばねの超弾性変形挙動の有限要素解析

概要

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Shape memory alloys (SMA) are in much expectation of successful adaptation in a broad set of advanced applications with superelastic behaviors accompanied by martensitic phase transformations. To increase the degree of sophistication in the design process, there is a growing need for computational tools able to support the design of SMA-based devices. In this paper, the Brinson's one-dimensional constitutive modeling for SMA is extended to take into account the asymmetric stress-strain behavior, twisting behavior and large deformation and applied to the finite element analysis. To show the validity of the present computational procedure in actual design of SMA actuators, the superelastic behavior of a helical spring is analyzed and the calculated results are compared with the experimental results of Taya.
一般社団法人日本機械学会の論文
2003-03-13