形状記憶合金アクチュエータの出力(G03-10 構成式・変形解析(2),G03 材料力学)

概要

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Shape-recovery stress due to shape-memory effect can be utilized as a power source of SMA-based actuators. Based on experimental and modeling analysis, this study examines the magnitude of the recovery stress in a Nickel-Titanium shape-memory alloy (SMA). When the shape change of a martensite is blocked and the martensite is heated to a temperature above the Af, recovery stress develops to be larger than the stress for superelasticity at the temperature. This result cannot be explained by early works on constitutive equations of shape-memory effect (Tanaka 1986, Brinson 1993). It is found that the one-dimensional model proposed by present authors (Kato, Inagaki, Sasaki 2004) gives a close estimate on the magnitude of recovery stress and its dependence on the prestrain given to martensite.
社団法人日本機械学会の論文
2004-09-04